Q: What should be considered when using a micro air pump for particle counting applications?

A: Particle detection differs from gas analysis as it involves measuring the mass and number of particles. The common method used is the laser scattering method. The gas to be tested is passed through a laser beam, and the scattering of the beam is observed for detection and counting. This application requires a pump that can control the flow rate and demands stable airflow with minimal pulsation.

Both micro diaphragm pumps and rotary vane pumps are commonly used as sampling pumps. Diaphragm pumps generally have slightly higher pulsation compared to rotary vane pumps. However, diaphragm pumps with multi-chamber structures or those equipped with flow stabilization devices can achieve flow stability comparable to rotary vane pumps.

Importantly, diaphragm pumps can utilize various corrosion-resistant rubber materials, offering far superior media compatibility and a significantly longer operational lifespan than rotary vane pumps, effectively reducing the total life cycle cost. Hilead Technology can integrate various flow stabilization components based on customer requirements to effectively eliminate gas pulsation while meeting the flow rate requirement of 2.83 L/min.

Additionally, it is recommended to place the sampling pump at the very end of the gas path, operating in suction mode. Installing a filter between the detection chamber outlet and the pump inlet prevents impurities from entering the pump and affecting the media entering the chamber, thereby extending the pump’s service life.

Q: How to choose a more suitable micro vacuum pump for “vacuum filtration” applications?

A: Vacuum filtration, also known as “suction filtration,” is an application that uses vacuum-generating equipment, such as vacuum pumps, to accelerate the separation of solid-liquid mixtures.

The equipment used typically includes a Buchner funnel, a filtration flask, and a vacuum pump. When selecting an appropriate micro vacuum pump, two main factors should be considered:
(1) Consider the pressure resistance of the funnel and filter paper to determine the required vacuum level for the pump.
(2) Consider the power supply for the application scenario. For example, when used in the field without mains power, a low-power micro vacuum pump powered by batteries can be chosen.
Furthermore, when using a micro vacuum pump in this scenario, customers need to prevent liquids and other solid impurities from entering the pump chamber, as this can affect the pump’s service life.

Q: How to select an air pump suitable for aeration or gas washing applications?

A: In the field of chemical analysis, gas washing typically involves bubbling gas through a washing bottle filled with liquid to remove impurities soluble in the liquid or to remove or convert specific components through reaction with the liquid. In aquaculture, aeration increases the dissolved oxygen levels in the water. In wastewater treatment, the purpose of aeration is to prevent solids from settling in the tank, enhancing contact between organic matter, microorganisms, and dissolved oxygen, thus ensuring the oxidation and decomposition of organic pollutants by microorganisms under sufficient oxygen conditions.

Both aeration and gas washing usually require the exhaust tube to be submerged below the liquid surface to achieve optimal results. Therefore, this application requires an air pump capable of delivering positive pressure. Depending on the required flow rate, our series of combined pressure/vacuum pumps, such as the D15, D23, D35, D50, D60 models, are most suitable.

When selecting a pump, it’s crucial to consider the water pressure at the exhaust port (Pump Output Pressure = Actual Required Pressure + Water Pressure). The water pressure is determined by the depth of the gas outlet below the liquid surface; the deeper the outlet, the higher the output pressure required from the pump. When the pump’s output pressure equals the water pressure, the pump will deliver zero flow, as the flow rate decreases with increasing pressure.

I. Abstract

In the modern industrial automation field, efficiently and reliably integrating and controlling decentralized actuators (such as pumps and valves) and sensors is a key challenge in enhancing overall equipment performance and intelligence levels. Traditional discrete control methods have inherent pain points, including complex wiring, numerous protocols, and difficult maintenance.

This case presents and validates an integrated solution based on the Modbus industrial bus. The core of this solution lies in adopting our company’s TS-CC intelligent speed controller, specifically designed for micro diaphragm pumps. The TS-CC speed controller acts as an “intelligent gateway” for micro diaphragm pumps to access the industrial bus network, enabling all compatible micro diaphragm pumps to be easily converted into standard Modbus slave devices. Through a single master controller (such as a PLC or industrial PC), centralized start/stop, precise speed regulation, status monitoring, and coordinated linkage with other Modbus devices (solenoid valves, sensors) can be achieved for multiple diaphragm pumps.

This solution significantly simplifies the system architecture, reduces wiring costs and debugging difficulty, improves control precision and system maintainability, making it an ideal choice for flexible production units geared towards Industry 4.0.

II. Project Background and Industry Requirements

In numerous industries such as fine chemicals, environmental water treatment, food and beverage, biopharmaceuticals, and laboratory automation, micro diaphragm pumps are widely used for fluid transfer, metering, and dispensing due to their compact structure, pollution-free operation, and ease of metering. Typical application systems often include multiple diaphragm pumps, multiple solenoid valves, and various sensors like liquid level, flow, and pressure sensors.

Main Challenges Faced by Traditional Control Modes:

1. Complex Wiring: Each pump and valve typically requires independent power lines and control signal lines (such as PWM or 0-10V), leading to cumbersome control cabinet wiring, dense on-site cabling, and difficult fault troubleshooting.
2. Non-Uniform Protocols: Devices from different manufacturers may support different communication or control protocols, requiring additional protocol conversion modules for integration, increasing system complexity and cost.
3. Poor Scalability: Adding or adjusting equipment requires rewiring and modifying the controller program, resulting in long modification cycles and affecting production flexibility.
4. Lack of Status Monitoring: Traditional simple speed regulation methods struggle to obtain real-time operational status of the pump (such as faults, overload), hindering predictive maintenance.

As a mature, open, and widely adopted industrial communication standard, the Modbus bus provides an excellent solution path for the above issues. Its master-slave architecture and ease of implementation make it the preferred network for achieving centralized control at the device level.

III. Technical Solution Design: Modbus Bus Integrated Control System

System Architecture

This solution adopts a standard Modbus RTU over RS-485 bus network (Modbus TCP/IP over Ethernet is also supported) to build a distributed control system with one master and multiple slaves.

[Master Controller (PLC/Industrial PC)]

Figure 1: System Topology Diagram

Control Logic

• The master controller, acting as the Modbus master, periodically polls or communicates with each slave device based on event triggers.
• Each TS-CC speed controller and the micro diaphragm pump it drives act as an independent slave node with a unique station address.
• The master controller writes register values to the TS-CC speed controller at a specified station address to achieve start/stop control and speed setting (0-100%) for that pump.
• Simultaneously, the master controller reads the registers of the TS-CC speed controller to obtain real-time information such as the pump’s actual speed, operating current, and fault status.
• Based on feedback data from sensors (e.g., liquid level, flow), the master controller coordinately controls the actions of micro diaphragm pumps and solenoid valves via the bus, implementing complex process logic.

IV. Core Component Introduction: TS-CC Speed Controller

The TS-CC speed controller is the core intelligent interface unit of this integration solution, specifically designed to seamlessly upgrade our company’s micro diaphragm pumps into networked intelligent actuators.

Product Positioning: “Modbus Bus Intelligent Driver Card” for micro diaphragm pumps.

Key Features:

1. Full Protocol Compatibility: Natively supports Modbus RTU (RS-485) protocol for easy integration into existing industrial networks.
2. Precise Drive: Utilizes an efficient PWM drive circuit for stepless and smooth speed regulation of the micro diaphragm pump motor, offering high-speed control precision.
3. Comprehensive Feedback: Built-in current detection circuit allows real-time monitoring of pump operating current, featuring overcurrent protection, stall protection, and fault status reporting functions.
4. Industrial-Grade Design: Wide voltage input (5V/12/24VDC), features reverse polarity protection and overvoltage protection. Its compact housing facilitates easy installation and suits industrial field environments.
5. Plug-and-Play: Connects to specified model micro diaphragm pumps via a dedicated interface, eliminating complex wiring and debugging.
6. Dedicated PC Software: Convenient for debugging and configuration.

Technical Parameters Overview:

• Communication Interface: RS-485 (Isolated)
• Supported Protocol: Modbus RTU
• Control Commands: Start/Stop, Speed Setting (0-100%)
• Feedback Information: Actual Speed, Load Current, Fault Code
• Power Input: 12/24 VDC

V. Micro Diaphragm Pump Product Series

Our company offers a full range of micro diaphragm pumps perfectly compatible with the TS-CC speed controller, meeting various flow, pressure, and media requirements.

Product Line Overview:

• D Series Diaphragm Air Pumps: Used for transmitting gas or creating vacuum, typically suitable for gas transfer or gas sampling.
• S Series Micro Diaphragm Liquid Pumps: Pump heads and diaphragms can be made of corrosion-resistant materials like PTFE for transferring various corrosive or neutral liquids.
• DP-F Series: Food and pharmaceutical grade, meeting relevant hygiene standards, easy to clean and sterilize.

Core Advantages:

1. Seamless Compatibility: All models provide a standard interface for the TS-CC speed controller, ensuring connect-and-use capability.
2. High Performance: Long-life design, low power consumption, high reliability, and stable flow.
3. Easy Integration: Compact modular design facilitates embedding into equipment and offers plug-and-play functionality.

VI. System Integration and Configuration Guide

Hardware Connection Steps

1. Connect Pump and Controller: Directly insert the motor connector of the micro diaphragm pump into the dedicated output socket of the TS-CC speed controller.
2. Power Connection: Connect a 12/24V DC power supply to the TS-CC speed controller.
3. Bus Connection:
   • Use shielded twisted pair cable to connect the “A” and “B” terminals of all TS-CC speed controllers and other devices on the bus.
   • Connect 120Ω termination resistors in parallel between the “A” and “B” terminals at the beginning and end of the bus.
4. Address Setting: Set a unique Modbus station address (1-247) for each node using the TS-CC speed controller PC software.

Software Configuration and Programming Example

1. Master Configuration: Configure Modbus master parameters (baud rate, data bits, stop bits, parity) in the PLC or PC software. These must match the default settings of the TS-CC speed controller (e.g., 19200, 8, 1, None).
2. Register Mapping:
   • Control Register (Holding Register, Address 0x0001): Write 500-3000, corresponding to speed setting 500-3000 RPM.
   • Status Register (Input Register, Address 0x0002): Read 500-3000, representing actual speed in RPM.
3. Programming Example (Pseudocode Logic Fragment): // Set pump speed at station address 01 to 2000 RPM MODBUS_WRITE: Slave_ID := 1; Function := 0x06; // Write single holding register Address := 0x0001; // Corresponds to register 0x0001 Data := 2000; // 2000 RPM speed Trigger := Start_Signal; // Read pump start/stop status at station address MODBUS_READ: Slave_ID := 1; Function := 0x04; // Read input registers Address := 0x0000; // Start from 0x0000 Length := 1; // Read 1 register Trigger := Periodic_Timer;

VII. Application Example and Effect Analysis

Scenario: Intelligent Chemical Agent Quantitative Dosing System

In the pH neutralization stage of an environmental water treatment plant, precise control over the dosing amounts of acid and alkali agents is required based on influent flow rate and real-time pH value.

Traditional Solution: Using two independently regulated micro diaphragm pumps with analog speed controllers. pH meter and flow meter signals are connected to the PLC, which controls pump speeds via analog outputs (0-10V). This requires extensive analog signal wiring, is susceptible to interference, and cannot remotely obtain pump status.

After Adopting This Solution:

• Equipment: 2 S33 series corrosion-resistant diaphragm pumps + 2 TS-CC speed controllers + 1 Modbus pH meter + 1 Modbus flow meter.
• Integration: All devices connected to the PLC via a single RS-485 bus.
• Control Logic: The PLC calculates in real-time based on flow and pH feedback and adjusts the dosing speed of the two pumps via Modbus commands.

Implementation Effect Comparison:

Customer Feedback: The system operates stably, dosing accuracy is significantly improved, and daily maintenance workload is greatly reduced.

VIII. Summary of Advantages and Product Value

Core Value of TS-CC Speed Controller:

• Simplify Complexity: Transforms the traditional complex “power + signal” control mode into a minimalist “power + network” mode.
• Cost Optimization: Significantly saves costs related to PLC modules, cables, and installation labor, reducing the Total Cost of Ownership (TCO).
• Information Transparency: Enables data acquisition at the actuator level, providing a data foundation for equipment health management and predictive maintenance.
• High Reliability: Industrial-grade design and digital communication offer strong anti-interference capability, enhancing overall system reliability.

Advantages of Matching Micro Diaphragm Pumps:

• One-Stop Solution: Provides a complete product chain from the pump body to the bus interface, ensuring optimal compatibility and performance.
• Enhanced Product Competitiveness: Helps equipment manufacturers (OEMs) rapidly develop more advanced and competitive intelligent fluid handling equipment.

IX. Conclusion and Recommendation

Integration and networking are irreversible trends in industrial automation. By adopting a control architecture based on the Modbus bus, combined with our TS-CC intelligent speed controller and high-performance micro diaphragm pumps, customers can efficiently and economically build modern fluid control systems.

We sincerely recommend adopting this solution for new project designs or upgrades of existing equipment to reap the multiple benefits of simplified engineering, enhanced performance, and reduced long-term operational costs. Our technical team can provide full-process support from selection and solution design to commissioning assistance.

Whether a micro pump possesses good air tightness and one-way pressure retention capability is a key distinction between industrial-grade and consumer-grade micro pumps. In industrial applications, micro pumps are often used to transfer high-risk or high-value media. Therefore, having excellent air tightness to prevent media leakage is a typical characteristic of industrial-grade micro pumps. Customers frequently inquire about a pump’s air tightness or pressure retention. Many tend to conflate a pump’s one-way pressure retention with its inherent air tightness. While these two performance aspects are distinct, they also influence each other. This article primarily explains the differences between these two characteristics and introduces the air tightness testing methods for Hilin Technology’s micro pumps.

One-Way Pressure Retention of a Pump

One-way pressure retention in a pump refers to the ability where, after a micro vacuum pump evacuates a sealed container or a micro air pump pressurizes it, the vacuum or positive pressure inside the container can be maintained for an extended period even after the pump is powered off. This requires the pump to act as a check valve in this state, emphasizing the unidirectional nature of airflow, hence “one-way pressure retention.” This performance has been discussed in previous articles. A micro pump is a power element within a pneumatic system; its primary duty is to provide power to the system.

The function of a check valve cannot be entirely entrusted to the pump. While micro pumps do contain two internal check valves, they differ from standard one-way check valves available on the market. Their purpose is to reliably ensure unidirectional airflow during pump operation, focusing on dynamic performance, not on providing a tightly sealed closure under static conditions. If pressure needs to be maintained after the pump stops, a separate one-way check valve should be added to the pneumatic circuit, along with ensuring proper sealing of the tubing.

Inherent Air Tightness of a Pump

The inherent air tightness of a pump reflects the extent of leakage from the pump itself when used for gas transfer. A pump’s air tightness is influenced by factors such as mechanical structure and assembly precision. All Hilin micro pumps undergo air tightness testing before leaving the factory. Standard and Premium versions have strict testing standard requirements for air tightness, while the Simplified version has no such requirements. Below is an introduction to Hilin’s micro pump air tightness testing fixture and standards.

Introduction to Air Tightness Testing Fixture Principles and Standards

The air tightness testing fixture consists of two parts , connecting to the inlet and outlet of the pump under test. Before testing a pump with this fixture, the fixture itself must undergo an air tightness test. The testing principle involves connecting the two parts of the fixture together. The test is divided into positive pressure testing and negative pressure testing.

Gas is pushed in or drawn out by a source pump to reach the target test pressure (for positive pressure testing, the gauge pressure should exceed the maximum output pressure of the micro pump under test by 10 kPa; for negative pressure testing, the absolute value of the gauge pressure should exceed the absolute value of the maximum vacuum of the micro pump under test by 10 kPa, but not exceed -92 kPa). The ball valve is then closed. After stabilizing for 1 minute, the initial pressure is recorded. Pressure retention continues, and the sum of pressure changes on both gauges over 10 minutes must not exceed 1 kPa.

Introduction to Pump Air Tightness Testing Principles and Standards

Pump air tightness testing is also divided into positive pressure testing and negative pressure testing . The principle involves using a source pump to push gas in or draw it out to reach the target test pressure, closing the ball valve, stabilizing for 1 minute to record the initial pressure, continuing pressure retention, and recording the sum of pressure changes on both gauges over a specified period. The testing standards for some of Hilin Technology’s micro pump series are shown in Table 1.

Table 1: Micro Pump Test Pressure Values and Standards

Furthermore, when testing a pump’s air tightness using the testing fixture, the sum of pressure changes includes the inherent air tightness condition of the fixture itself.

Summary

As a typical manufacturer of industrial-grade micro pumps, Hilin Technology has developed specialized testing equipment, methods, and standards for pump air tightness. We can provide strict factory inspection reports for product air tightness based on customer needs, thereby meeting the high standards required for industrial applications. We welcome all customers to consult our pre-sales engineers for further inquiries regarding air tightness, pressure retention, and related products.

What customization options are available for Hilin micro pumps?

Our customization options are divided into four major categories, offering extensive choices to meet diverse customer requirements.

1. Parameter Customization:
We can customize flow parameters, pressure parameters, power supply parameters, and lifespan parameters. For special parameter requirements that cannot be met by our standard products, please contact the Hilin Chengdu pre-sales engineers to obtain a quotation for parameter customization options.

2. Operating Temperature Customization:
Our standard products typically operate within an ambient temperature range of 0-50°C. If operation in lower or higher ambient temperatures is required, specially designed ambient temperature models can be ordered. There are also temperature requirements for the gas or liquid medium being pumped. If there is a need to pump special high-temperature gas or liquid, our company can provide high-temperature medium custom products capable of handling media up to 100°C.

3. Function and Connector Customization:
For specific control function requirements, such as compatibility with particular control signals, or for specific material or size requirements for inlet/outlet ports, our company can provide customization options.

4. Special Customization Options:
For special customization needs beyond the above standard options, our company offers project-based custom R&D services. We can perform custom development and production to meet unique, non-standard customer demands, such as military standard products, special materials or dimensions, or specific functions/parameters. For details, please contact the Hilin Chengdu pre-sales engineers.

What effects can be achieved by connecting miniature diaphragm vacuum pumps in series or parallel?

Common miniature diaphragm vacuum pumps include single-head and double-head pumps. Double-head pumps allow for the series or parallel connection of the two pump heads.

• Parallel connection of double heads increases flow rate. Neglecting pneumatic circuit attenuation, the theoretical flow rate is the sum of the two pumps, while the pressure remains unchanged.
• Series connection of double heads increases pressure, but not multiplicatively. This secondary compression or evacuation needs to be calculated based on the pump’s compression ratio or evacuation ratio (which is fixed for a given pump).

For example: The relative vacuum level of our miniature single-head vacuum pump model VBY8009A is -80 kPa (standard atmospheric pressure is 101 kPa), which converts to an absolute pressure of 21 kPa. The evacuation ratio of this pump is approximately 0.207. When two VBY8009A pumps are connected in series, the second pump continues evacuation starting from the absolute pressure of 21 kPa achieved by the first pump. If the evacuation ratios of both pumps are consistent, the absolute pressure after the second pump’s evacuation would be 4.36 kPa. At this point, the relative vacuum level would be approximately -96.63 kPa. Actual tests align closely with this theoretical calculation.

Currently, Hilin micro pumps also feature dual-chamber pump applications utilizing series connection for pressure boost or parallel connection for flow increase, such as the C60, D60, and C61 series. However, our series/parallel configurations are integrated within the pump housing. If there is a need for external double-head pump configurations, please consult with our staff for further discussion.

Which models of Hilin miniature air pumps are suitable for portable applications?

We often receive inquiries from customers about air pumps suitable for portable applications, such as mobile atmospheric monitoring. Portable applications typically have the following characteristics:

1. Compact size, lightweight, and easy to install.
2. Primarily used outdoors and powered by batteries.
3. Long lifespan and maintenance-free.

To address the needs of portable applications, Hilin Technology offers mature and widely applied product solutions, including:

• The D15 series miniature air pumps, which feature integrated voltage stabilization modules and are suitable for wide-voltage battery power supply without compromising performance parameters.
• The D23 series miniature air pumps, known for their ultra-quiet operation and excellent air tightness.
• The D09 series compact pumps, which are only about the size of a thumb and have low power consumption.
• The D25 series miniature air pumps, which offer high cost-effectiveness.

For portable applications with other specific requirements, please consult our staff for further assistance.

Overview of Circulating Coolant Replenishment Applications

In industrial environments requiring liquid cooling, circulating pumps are typically used to drive the coolant flow within pipelines. However, due to evaporation, leaks, and other factors over time, there is a need to use small-flow micro vacuum liquid pumps to replenish the coolant in the liquid cooling circuit as needed. For example, in the metal heatsink manufacturing industry, testing liquid cooling circuits is essential to evaluate heatsink quality and effectiveness. These test circuits require on-demand replenishment of refrigerant. Utilizing micro-flow control for refrigerant liquid addition enables precise, stable, and reliable coolant replenishment.

In such scenarios, micro vacuum liquid pumps with low flow rates and high head are more suitable as coolant replenishment pumps. Integrated with on-site equipment processes and controlled by level sensors combined with PLCs or microcontrollers, these pumps can promptly activate to draw liquid when the coolant level falls below the normal line, thereby completing the liquid transfer and replenishment task.

The S36 series micro vacuum liquid pump features rapid response, convenient control, and real-time operational status monitoring and feedback. It is particularly well-suited for automated control in application scenarios that require integration with sensors and microcontrollers to achieve precise micro-volume liquid replenishment.

Product Features and Functions

• Operational Status Indication
  Only the knob speed control type and frequency speed control type are equipped with operational indicator lights, which provide intuitive feedback on the pump’s working status. The top-tier model is equipped with an LCD screen capable of displaying fault codes.
• Brushless Motor
  Utilizes high-quality brushless motors, offering advantages such as long lifespan, low interference, and high reliability.
• Protection Functions
  Incorporates overheat protection, overload protection, power under-voltage/over-voltage protection, and reverse connection protection to minimize the risk of accidental pump damage.
• Liquid and Gas Dual-Use
  Capable of functioning as both a liquid pump and a vacuum pump, and can also handle gas-liquid mixed media. It can run dry and is self-priming.
• Modular Connectors
  This pump series features an Rc1/8 internal threaded port. It can be fitted with stainless steel quick-connect fittings (for 6mm or 8mm inner diameter tubing), stainless steel barbed air nozzle connectors, or PP plastic barbed air nozzle connectors. The product comes standard with a PP plastic barbed connector.
  • The standard PP plastic barbed connector and the optional stainless steel barbed air nozzle are recommended for use with 7*13 silicone tubing. Tube size can be adjusted slightly based on tubing flexibility.
  • Two sizes of stainless steel quick-connect fittings are provided for use with 6*8mm or 4*6mm rigid tubing.
    Users can select the appropriate interface during ordering based on their piping requirements.
• Speed Control Function
  The pump’s flow rate can be adjusted by regulating the motor speed.
  • The top-tier model features an LCD touch screen and a speed control signal interface, allowing for start/stop control and speed adjustment either via the touch screen or through frequency signals.
  • The knob speed control type includes an external speed control knob for adjusting pump speed and controlling start/stop.
  • The frequency speed control type allows for speed adjustment and start/stop control via user-input frequency signals.
• Status Memory Function
  In the event of a power failure causing the pump to stop, it will resume operation in the same state (including memorized speed and operational status) upon power restoration.
  During normal use, when the micro vacuum liquid pump is started via the knob or touch switch, it will operate at the speed set before the previous shutdown.

In factory settings, liquid circulation is primarily achieved using AC circulating pumps as the core pressurizing components, enabling high-pressure, high-flow coolant circulation to drive coolant flow within pipelines. However, such pumps are not suitable for the role of coolant replenishment pumps.

Challenges in Coolant Circulation Replenishment Projects

1. Most micro vacuum liquid pumps on the market lack speed control functionality. Variations in on-site workload pressure lead to significant discrepancies between actual and expected flow rates, hindering the achievement of automated liquid replenishment control.
2. On-site applications often require micro vacuum liquid pumps to be self-priming, capable of drawing liquid immediately upon power-on, and able to run dry when no liquid is present.
3. There is a need to pump liquids with a certain degree of viscosity.
4. Factory equipment demands that micro vacuum liquid pumps operate continuously 24/7 without power interruption, requiring long lifespan, high stability, and minimal maintenance.

Application Analysis of the S36 Series Micro Vacuum Liquid Pump

The S36 series micro vacuum liquid pump, developed and manufactured by Chengdu Hailin Technology, generally offers a small liquid output flow rate, with an optional flow range of 0.2 L/min to 3 L/min. Its on-site connection to PWM signals enables adjustment of output flow and pressure, and it features pump speed feedback signal functionality, making it more aligned with practical on-site application needs.

The S36 series micro vacuum liquid pump is a dual-use type for both liquids and gases, functioning as either a liquid pump or a vacuum pump. It can run dry and is self-priming. There is no need to prime the pump chamber with liquid before starting; it can directly self-prime to create a vacuum and then draw the liquid.

Being a liquid and gas dual-use type, the S36 series micro vacuum liquid pump can directly run dry to create a vacuum, drawing a container to a certain negative pressure, and then directly pump liquids with some viscosity from the container.

Notes:

1. Input voltage requirement: 24V ±10%.
2. Unless otherwise specified, technical parameters are measured under conditions of 20°C and standard atmospheric pressure (101 kPa). Products with other parameter specifications can be customized upon request.
3. Parameters in the table are measured at the motor’s maximum speed. When speed varies, pressure/vacuum level remains largely unchanged.
4. The above parameters are measured with the standard PP plastic barbed air nozzle configured. Parameters may change slightly if other types of connectors are used.
5. The average flow rate in the table is measured using a soap film flowmeter.

Product Types and Specifications

The S36 series products are divided into four types based on functionality: Basic Type, Knob Speed Control Type, Frequency Speed Control Type, and Top-tier Type. Different versions exist within each type based on varying quality control and manufacturing processes. The differences between versions are illustrated in the chart below. For specific distinctions between different types, please visit the Hailin Technology official website at www.mini-pump.com to download the corresponding product manual free of charge.

Notes:

1. More ★ symbols indicate better performance in that specific aspect.
2. The lifespan for the Standard Edition and Quality Edition is still under testing.
3. The number of ★ symbols is for illustrative purposes only, intended to help readers intuitively understand the differences between versions.

Dear Customers, Partners, and Industry Colleagues,

We are thrilled and proud to announce that after months of rigorous testing, the SCVP Series Servo Proportional Valve has successfully completed the 1 million full-load reciprocating life cycle evaluation test! This is not only a significant milestone in product reliability verification but also a crucial step in fulfilling our commitment to the industry and setting a new benchmark for quality!

Milestone Breakthrough: Phase One Design Goal Achieved

In this landmark test, the SCVP Servo Proportional Valve demonstrated exceptional technical strength and product quality:

• Outstanding Operational Lifespan: Under continuous high-intensity testing simulating real working conditions, the product maintained stable performance for over 1 million cycles, with all key parameters remaining highly consistent—far exceeding standard industrial application requirements.
• Excellent Reliability: Throughout the test, the valve’s response speed, control accuracy, and dynamic characteristics remained at an optimal level, with no signs of performance degradation, confirming the scientific design and precision manufacturing.
• Superior Sealing Performance: Even after 1 million cycles, the valve’s sealing system maintained near-perfect airtightness, with leakage rates well below design standards, showcasing our profound expertise in fluid control technology.

Industry-Leading Performance Metrics

The SCVP Servo Proportional Valve achieved multiple key performance indicators at an industry-leading level:

• Control accuracy error maintained within ±0.5%;
• Response time stabilized below 10 milliseconds;
• Full-stroke operation time under 500 milliseconds;
• Repeat positioning accuracy better than 0.1%;
• Energy consumption and current draw reduced by 30% compared to similar products.

These exceptional results not only validate the product’s superior performance but also ensure higher production efficiency and more stable quality control for our customers.

The Foundation Behind Our Technical Strength

This achievement stems from our continuous advancements in multiple technical fields:

• Breakthroughs in Material Science: Self-developed wear-resistant and corrosion-resistant special material combinations significantly extend the service life of critical moving parts.
• Precision Manufacturing Processes: Nanometer-level machining accuracy combined with intelligent assembly ensures every product meets design specifications.
• Innovative Sealing Technology: Multi-layer composite sealing structures with intelligent compensation design ensure long-term stable sealing performance.
• Smart Control Algorithms: Adaptive control algorithms optimize dynamic response in real time, enhancing control precision and stability.

Toward New Horizons: Next-Phase R&D Goals Launched

The successful completion of the 1 million-cycle test is not an end but a new beginning. The SCVP R&D team has already initiated the next phase of objectives:

• 5 Million Ultra-Long Life Verification Plan: Conduct higher-standard life testing for more demanding application scenarios.
• Extreme Condition Adaptability Research: Expand the product’s applicability in high-temperature, high-pressure, and highly corrosive environments.
• Intelligent Function Integration: Incorporate industrial IoT and predictive maintenance technologies to develop next-generation intelligent fluid control solutions.
• Energy Efficiency Optimization: Further reduce product energy consumption to support customers’ green and sustainable development goals.

Gratitude and Collaboration for the Future

This milestone would not have been possible without the trust and support of our customers, the collaboration of our partners, and the relentless efforts of our R&D, manufacturing, and testing teams. We extend our sincerest gratitude to everyone who contributed to this achievement!

Precision Fluid Control, Driving the Future—We will continue to uphold our spirit of innovation and dedication to craftsmanship, constantly pushing technological boundaries to provide more reliable, efficient, and intelligent fluid control solutions for our customers. Together, we will advance industry progress and technological upgrading.

For more detailed information and application cases about the SCVP Servo Proportional Valve, please visit our official website or contact your local sales representative.

Let us join hands and contribute Chinese ingenuity to the advancement of global fluid control technology!