Hilintec Launches High-Air-Tightness Diaphragm Pump Product Line – D15TS/D37TS/D50TS High-Air-Tightness Specialized Diaphragm Pumps, Delivering a Reliable Core for High-End Equipment

Inside a precision gas chromatograph, the carrier gas flows through the chromatographic column at just a few milliliters per minute, separating each characteristic peak of the target components. In a clean semiconductor fab, a miniature pump on a robotic arm performs wafer vacuum adsorption with extremely high air-tightness. On a fuel cell test bench, hydrogen is precisely circulated under pump drive. These three seemingly unrelated scenarios all rely on the reliable operation of the same core component: the high-air-tightness diaphragm pump.

In March 2026, Chengdu Hilin Technology Co., Ltd.(Hilintec) officially launched the D15TS, D37TS, and D50TS series of high-air-tightness diaphragm pumps. This is not a set of three isolated products, but a systematically conceived complete solution—covering a full flow gradient from 100 mL/min to 20 L/min, a full pressure range from –90 kPa negative pressure to +300 kPa positive pressure, and full-scenario compatibility with multiple wetted materials including EPDM, FKM, PTFE, and 304 stainless steel. From portable analyzers on laboratory benches to large-scale gas handling systems on production lines, every flow level and every pressure requirement has a corresponding answer.

Behind this is Hilintec’s years of deep cultivation in the field of fluid control core components. With an industry-leading “ultra-low leakage” air-tightness design architecture, a modular pneumatic interface ecosystem, and an industrial-grade long-life reliability system, this product line targets five high-end application scenarios: gas analysis, medical and life sciences, semiconductor and precision manufacturing, new energy and fuel cells, and special industrial and scientific research. It provides a fully autonomous and controllable high-air-tightness fluid transfer solution for domestic high-end equipment, with leakage rates as low as 10⁻⁷ Pa·m³/s (Pascal cubic meters per second) as verified by helium mass spectrometry.

I. Industry Pain Points and Market Opportunities

When Leakage Is No Longer Tolerated

Driven by the wave of Industry 4.0, global manufacturing is accelerating its transformation toward higher-end, more precise, and greener directions. Semiconductor chip manufacturing, biomedicine, new energy batteries, environmental monitoring, and analytical instrumentation—these industries share a common trait: their sensitivity to “air-tightness” has reached an unprecedented level.

In chip manufacturing, even the slightest gas leak can disrupt the stability of the vacuum environment, causing deviations in lithography or etching processes, and potentially scrapping entire batches of wafers. In biochemical and gas analyzers, carrier gas leakage translates into drift in detection results, directly affecting the accuracy of clinical diagnoses and industrial production. In the hydrogen energy sector, hydrogen leakage is a red-line issue that directly impacts personal safety.

However, the miniature diaphragm pump products currently available on the market struggle to meet these stringent requirements across multiple dimensions:

First, insufficient air-tightness. Traditional miniature pumps mostly use sealing solutions derived from general industrial designs, resulting in relatively high leakage rates that often fall short in demanding analytical applications.

Second, the trade-off between flow rate and air-tightness—to achieve high flow rates, some products compromise on sealing structures, and under high-pressure conditions, even a tiny gap can be magnified, leading to seal failure.

Media compatibility is another unavoidable challenge: one medium requires the flexible weather resistance of EPDM, while another demands the corrosion resistance of FKM—a single material solution cannot satisfy both.

Moreover, the limited variety of port interfaces means that when engineers integrate miniature pumps into complex pneumatic systems, they often need to fabricate additional adapters, increasing system integration costs and leakage risks.

Uncontrollable reliability is the final straw for users—the lack of rigorous factory-wide inspection and life-cycle validation makes the degradation of sealing performance over long-term operation unpredictable.

The Window for Domestic Substitution Is Opening

On the flip side of these challenges lies opportunity. Against the backdrop of the national “domestic substitution” strategy and the push for localization of high-end equipment, domestic enterprises are accelerating breakthroughs through core technology development: the localization rate of high-performance diaphragm materials has significantly improved, and precision machining processes are gradually approaching internationally advanced levels. Hilintec’s simultaneous launch of the D15TS, D37TS, and D50TS high-air-tightness diaphragm pumps is a precise response at this critical juncture—offering a complete product matrix to meet high-air-tightness requirements across different levels, operating conditions, and budget ranges.

II. Product Line Overview – Three Series, Full-Matrix Layout

The D15TS, D37TS, and D50TS series are built on a unified high-air-tightness technology platform, yet each has been independently and specifically designed for different flow levels and application scenarios. Together, they form a complete product line spanning from micro-flow to medium-to-large flow—each product with its own clear mission.

Product Comparison Parameter Table

Parameter	D15TS Series	D37TS Series	D50TS Series
Product Positioning	Compact, low-energy, portable series	Medium-flow industrial-grade series	High-flow, high-power series
Rated Voltage	5V / 12V / 24V DC	12V / 24V DC	12V / 24V DC
Peak Flow Rate	≤1 L/min	≥6.0 L/min	≥20 L/min
Relative Vacuum	≥–40 kPa	≥–90 kPa (V-type) / ≥–65 kPa (P-type)	≥–50 kPa
Output Pressure	≥40 kPa	≥50 kPa (V-type) / ≥300 kPa (P-type)	≥115 kPa
Pump Head Material	Aluminum alloy / Stainless steel	304 Stainless steel	Stainless steel
Diaphragm Material	EPDM / FKM	EPDM (diaphragm + valve), FKM (seal)	EPDM / FKM
Motor Type	BLDC brushless motor	BLDC brushless motor	BLDC brushless motor
Port/Connector	M3 / M5 female thread	Rp1/8 female thread + K6 push-in + 6mm ferrule	Rp1/8 + NPSC1/8 female thread + B6/B8/K6/K8 push-in quick-connect
Protection Rating	—	IP66 (fully sealed pump body)	—
Loaded Lifetime	7,500h (standard) / 10,000h (premium)	5,000h	8,000h
No-Load Lifetime	10,000h (standard) / 12,000h (premium)	7,000h	12,000h
Motor Lifetime	15,000h	10,000h	15,000h
Weight	Approx. 240 g	Approx. 700 g	Approx. 1,600 g
Typical Applications	GC/MS injection, microfluidics, lab analysis, medical diagnostics, handheld/portable instruments	High-load gas transfer, high-pressure line sampling, industrial gas analysis, semiconductor equipment, high-humidity/dusty harsh environments	Hydrogen energy equipment, nuclear power/nuclear industry, specialty high-value gas transfer, bulk gas handling

D15TS: Small Size, Big Performance

The D15TS is the most compact of the three products. Weighing just 240 grams, it offers three voltage options—5V, 12V, and 24V—with the 5V version directly powered by USB or battery, making it naturally suited for portable analytical instruments, handheld detection devices, and mobile medical devices.

But compactness does not mean compromised performance. The D15TS features an all-metal pump head (aluminum alloy or stainless steel optional) paired with EPDM or FKM diaphragms, delivering excellent baseline air-tightness. Its gas ports can be rotated 360° freely—a seemingly simple design detail that often solves major issues in space-constrained instrument interiors: engineers no longer need to re-route tubing to accommodate the pump’s port orientation. Every unit undergoes rigorous 100% air-tightness inspection before shipment, with leakage rates controlled within high-standard limits.

For applications such as GC/MS injection systems, microfluidic chip drivers, compact medical diagnostic equipment, and handheld/portable analyzers, the D15TS is a nearly effortless choice—small enough, low enough in power consumption, and with air-tightness good enough.

D37TS: All-Metal Workhorse, Built for Harsh Conditions

If the D15TS is the capable assistant in the precision instrument room, the D37TS is the battle-hardened iron warrior on the industrial floor. Its pump head is made of 304 stainless steel all-metal material, offering corrosion resistance and mechanical strength far superior to conventional aluminum alloy solutions.

Even more striking is its pressure performance: the V-type version achieves a relative vacuum of –90 kPa, while the P-type version delivers 300 kPa of positive pressure—meaning the D37TS can not only “suck cleanly” but also “push powerfully,” sufficient to handle demanding scenarios such as high-pressure line sampling and high-load gas transfer.

The D37TS is also the only series in the entire product line with an IP66 protection rating. Its fully sealed pump body allows it to withstand dust and moisture ingress without concern, ensuring long-term stable operation even in outdoor monitoring stations, high-humidity workshops, or dusty environments.

With Rp1/8 female thread, K6 push-in connectors, and ferrule-type connectors available as options, the D37TS can be easily integrated into different types of tubing systems. Industrial gas analysis, gas transfer in semiconductor equipment, fuel cell testing—these scenarios with extremely high demands on air-tightness, reliability, and environmental adaptability are precisely the D37TS’s battlefield.

D50TS: High Flow, No Compromise

When the application requires handling larger gas volumes, the D50TS takes the stage. Its peak flow rate reaches 20 L/min, making it the undisputed “heavy lifter” among the three. However, high flow does not come at the expense of air-tightness—the all-stainless pump head, EPDM/FKM diaphragm options, and 100% factory air-tightness inspection ensure that standards are not relaxed simply because of increased size.

In terms of interfaces, the D50TS offers the richest selection: Rp1/8 national standard thread and NPSC1/8 American standard thread dual coverage, while B6/B8 ferrule connectors and K6/K8 push-in connectors accommodate different tubing diameters and materials. The pump head supports 90° rotation and offers a side-mounting option—when space inside equipment is limited and bottom mounting is not feasible, this design proves especially thoughtful.

Hydrogen equipment gas circulation, specialty gas transfer in the nuclear power industry, batch chemical processing—these scenarios demand not only high flow but also long-term, stable air-tightness performance from the pump. The D50TS achieves an 8,000-hour lifetime under loaded conditions, with a motor lifetime of up to 15,000 hours—sufficient to cover the full lifecycle needs of the vast majority of industrial equipment.

Selection Logic: Match by Need, Not by Compromise

The three products form a clear tiered system: For analytical instrument engineers who work with micro-flow gases daily, the D15TS is the lightweight yet precise choice. For R&D personnel who need to handle complex gases and high loads on industrial sites, the D37TS’s all-metal ruggedness and IP66 protection inspire confidence. And for equipment integrators responsible for high-flow gas handling and batch production lines, the D50TS responds with 20 L/min flow and a wealth of interface options.

All three share the same high-air-tightness technological DNA and have been validated through 7×24-hour continuous operation testing in Hilintec’s aging and lifetime laboratory, designed to a 10,000-hour lifetime benchmark. All experimental data is authentic and traceable, and the factory test results for each pump are fully documented.

III. Core Technological Breakthroughs – Redefining “High Air-Tightness”

Specifications can only explain what a product can do; technology explains why it can do it. The design challenge of high-air-tightness diaphragm pumps lies in how to maintain sealing performance without degradation over long-term continuous operation, in an extremely compact space, and when handling gases of various natures. Hilintec’s answer is a systematic breakthrough across three technological dimensions.

3.1 The “Zero Leakage” Three-Layer Defense, from Structure to Materials

The first line of defense for high air-tightness comes from structural design. The D15TS/D37TS/D50TS series employs a “full-process sealing” architecture—a concept that may sound abstract but is quite intuitive at the physical level: the diaphragm chamber and drive chamber are completely isolated by a flexible diaphragm, meaning that no motion of the drive mechanism directly contacts the conveyed media. This means that the common shaft seal leakage path found in traditional miniature pumps is eliminated from the design from the outset.

But physical isolation alone is not enough. Hilintec engineers have added two additional layers of protection at the contact interface between the diaphragm and the pump head: O-ring auxiliary sealing compensates for microscopic gaps during assembly, while a self-adjusting compression mechanism automatically adjusts the clamping force when the diaphragm experiences slight wear over extended operation, ensuring continuous tight contact. These three layers form a complete sealing loop from the first day of delivery to the end of the pump’s service life.

Material selection is the cornerstone supporting this sealing architecture. The diaphragm is the most critical wear component of a diaphragm pump. Hilintec offers two mainstream options: EPDM, which provides good flexibility and weather resistance for medium-to-low temperature and general corrosive conditions; and FKM, which offers superior corrosion resistance and high-temperature performance for chemical and special industrial applications. For the pump head, aluminum alloy balances lightweight construction and heat dissipation, while 304 stainless steel meets the highest requirements for corrosion resistance and cleanliness.

The ultimate means of validating these designs is helium mass spectrometry leak detection. Helium, with its small molecular size and high permeability, is the gold standard for leak detection. All products in the series undergo 100% high-precision pressure-decay testing before shipment. Under helium mass spectrometry, sample leakage rates are ≤1×10⁻⁷ Pa·m³/s—one to two orders of magnitude better than similar products on the market.

3.2 Brushless Motor-Driven Intelligent Control

A decade ago, most miniature diaphragm pumps had only two states: “on” or “off.” Today, users expect more than just brute force—they need precise flow regulation, real-time operating feedback, and intelligent capabilities for seamless coordination with host systems.

Hilintec equips the entire product line with BLDC brushless DC motors as standard. The greatest advantage of brushless motors is the absence of carbon brush wear—motor life can reach 15,000 hours, far surpassing the limits of brushed motors. Its low electromagnetic interference characteristics are especially important for analytical instruments—in the presence of chromatographic or mass spectrometric detection signals, electromagnetic noise from the motor is often the enemy of signal-to-noise ratio.

To further lower the barrier to system integration, Hilintec also offers TS-OC and TS-CC series speed controllers as optional accessories. These controllers support Modbus industrial bus protocol as well as multiple control signal inputs including voltage, frequency, potentiometer, and PWM signals, allowing users to remotely set and monitor pump operating parameters directly via host computer or PLC without the need to develop PWM control circuits themselves.

3.3 The Widest Range of Connector Options – No More Compromises in Pneumatic Connections

In pneumatic system design, the connection between the miniature pump and the tubing is often the weakest link in the entire system’s air-tightness. A mismatched adapter or a loosely tightened ferrule can become a source of leakage.

Hilintec’s approach is to offer as many connector options as possible directly on the product, eliminating the need for additional adapters or modifications.

The D15TS is designed for miniature analytical instruments and portable devices, hence it comes standard with M3 female threads, with M5 female threads available as an option—these two specifications cover the interface standards of the vast majority of miniature chromatographs, mass spectrometers, and microfluidic devices on the market. Combined with the ability to rotate the port direction 360° freely, engineers no longer need to add tubing bends to accommodate pump orientation in space-constrained instrument layouts.

The D37TS offers Rp1/8 national standard cylindrical female threads, the most common interface specification in industrial gas analysis, semiconductor equipment, and medical pneumatic systems. The optional K6 push-in connectors allow for tool-free installation and removal of PU tubing—an obvious efficiency boost for applications requiring frequent media changes. The 6mm ferrule connectors are suitable for stainless steel precision tubing, providing long-lasting sealing reliability in high-pressure pneumatic systems.

The D50TS goes even further in connector richness. It simultaneously supports Rp1/8 national standard threads and NPSC1/8 American standard threads—allowing direct integration into both export equipment and American-standard systems without additional adapters. Six optional connectors (B6/B8 ferrule + K6/K8 push-in) cover stainless steel and PU tubing from 6mm to 8mm, encompassing virtually the most common industrial tubing specifications. Notably, the D50TS also supports side mounting—when the bottom space inside a cabinet or equipment is already occupied, this option often resolves layout challenges at a stroke.

All connectors are pre-inspected for air-tightness before shipment, ensuring that users can install and use them straight out of the box without additional sealing treatment.

IV. Quality Assurance System

High air-tightness is not a state that is “achieved” once; it is a process that must be “continuously maintained.” From the incoming inspection of raw materials for a single diaphragm to the packaging and shipment of the complete pump, Hilintec has established a quality control system covering the entire chain:

In terms of system certification, the company has passed ISO9001:2015 quality management system certification, and all high-air-tightness products have obtained CE EMC certification, meeting the access requirements for export to the EU market.

In terms of factory inspection, the most stringent step is 100% air-tightness full inspection—every pump must pass the pressure-decay leakage rate test before leaving the factory. Non-conforming products are immediately quarantined and never proceed to the next process.

In terms of reliability verification, Hilintec operates its own aging and lifetime laboratory, equipped with high-low temperature test chambers, humid-heat environment simulation chambers, pressure cycle test stands, and other equipment capable of simulating dozens of complex operating conditions including high temperature, high humidity, high/low pressure fluctuations, and frequent start-stop cycles. The lifetime data for all three series come from this laboratory, with complete and traceable test records.

In terms of customization capabilities, for clients with special requirements, Hilintec offers comprehensive services ranging from material selection (pump head, diaphragm, sealing rings), connector types, electrical interfaces, to mounting customization. Whether your equipment requires a specific port angle, a special voltage specification, or precise compatibility with an existing tubing system, it can be achieved through custom development.

V. Typical Application Areas

Gas Analysis and Environmental Monitoring

At environmental monitoring stations, air samplers need to extract PM2.5, VOCs, and other target components from the air around the clock for concentration analysis. If the pump itself has leakage, ambient air can mix into the sampling line, rendering the final analytical data meaningless. Similarly, in gas chromatography and mass spectrometry systems, the stable delivery of carrier gas directly determines the accuracy of detection results. The D15TS and D37TS series, with their ultra-low leakage rates and oil-free clean transfer characteristics, have already become the standard gas source solution for a number of domestically produced analytical instruments.

Medical and Life Sciences

Ventilators need to deliver precise oxygen concentrations and airflow pressures to patients; biochemical analyzers need to switch rapidly between different reagents and dispense samples accurately; cell culture incubators require continuous CO₂ supplementation to maintain the culture environment—these medical and life science scenarios share a highly consistent set of core requirements for miniature pumps: oil-free, sterile, leak-free, and low-noise. Hilintec’s high-air-tightness diaphragm pumps are completely oil-free by design, and combined with the clean characteristics of EPDM material, they introduce no contamination to the conveyed media. The D15TS is suitable for portable medical devices and benchtop diagnostic instruments, while the D37TS is better suited for respiratory therapy equipment and larger analytical platforms with higher pressure and flow requirements.

Semiconductor and Precision Manufacturing

Semiconductor manufacturing demands an almost extreme level of environmental cleanliness—the number of particles larger than 0.1 μm per cubic meter of air in a cleanroom cannot exceed the volume of a fist. In such environments, any gas transfer equipment containing oil mist or particle contamination would be directly eliminated. The oil-free design and all-metal sealed pump head of high-air-tightness diaphragm pumps inherently meet semiconductor cleanliness requirements, playing an irreplaceable role in wafer vacuum adsorption, inert gas protective transfer, and ultra-pure water transfer cavity pressurization. The IP66 protection rating of the D37TS provides additional reliability redundancy when facing high-temperature, high-humidity, or chemically aggressive environments.

New Energy and Fuel Cells

The performance and safety of a fuel cell depend largely on the air-tightness of the hydrogen transfer system. Hydrogen molecules are the smallest of all gases, meaning they pose the most stringent test of sealing. The D50TS’s 20 L/min high flow rate can meet the gas circulation needs of fuel cell test benches, while the brushless motors and over-current protection features standard across the entire series provide safety assurance for long-term, unattended operation. In the lithium battery manufacturing sector, diaphragm pumps are used for electrolyte filling and atmosphere protection gas transfer—here, high air-tightness prevents not just media leakage, but also safety incidents.

Special Industrial and Scientific Research

Nuclear energy gas sampling, corrosive gas transfer in the chemical industry, deep-sea high-pressure environment simulation—these scenarios that sound inherently “extreme” are precisely where high-air-tightness diaphragm pumps demonstrate their greatest value. The stainless steel pump head with FKM diaphragm can withstand highly corrosive gases; the entire series supports customizable connectors and mounting configurations to accommodate various non-standard experimental setups; and the traceable leakage test reports behind each pump provide the foundational assurance for the reliability and reproducibility of scientific data.

Conclusion: Leak-Free Sealing, Unrestricted Flow Control

From micro-flow injection in analytical instruments to high-flow gas transfer in fuel cells, from pristine clean laboratories to dust-swept outdoor monitoring stations—Hilintec’s D15TS/D37TS/D50TS high-air-tightness diaphragm pump product line, with its “zero leakage” air-tightness architecture, full-matrix product layout, modular connector ecosystem, and industrial-grade reliability validation, provides a solid and reliable “fluid heart” for the accelerating localization of high-end equipment.

We sincerely invite customers from all fields, partners, and industry experts to visit Hilintec for inspection and guidance, or to request samples for on-site verification testing. Whether it is mass supply of mature products or custom development for specific operating conditions—Hilintec is fully prepared.