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Alkaline Water Electrolysis Hydrogen

2026-08-12
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Applications · Alkaline Water Electrolysis Hydrogen

JONSN Precision Micro Gear Pump Application in the Hydrogen Production Industry Using Potassium Hydroxide (KOH) (Alkaline) ALK Electrolysis.

24/7 pulse-free KOH electrolyte circulation for alkaline water electrolyzers — engineered for 30% high-concentration alkaline lye loops, hydrogen skid systems, and long-cycle mass-production hydrogen plants with zero-flow-drift reliability under continuous non-lubricating alkaline operation.

24/7 pulse-free circulation
30% KOH alkali resistance
-40°C to 90°C range
94.3% volumetric efficiency
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Drawbacks of Conventional Pumps in Alkaline Electrolyzer Loops

Pumps currently integrated into ALK electrolysis hydrogen production lines suffer from critical failure modes that destroy membrane electrode durability, cause hydrogen crossover alarms, and break the 24/7 maintenance-free operation required by mass-production hydrogen plants.

Diaphragm / Plunger Pumps
Traditional electronic diaphragm pumps are reciprocating plunger pumps that deliver high pressure pulses, which fail to meet the stable constant fluid delivery requirements. Diaphragms suffer from fatigue, creep, and rupture, failing to meet the 24/7 continuous maintenance-free operation required by electrolyzers.
Screw / Ordinary Metal Gear Pumps
Conventional screw and ordinary gear pumps utilize metal rotors that lack self-lubricating properties, which are only suitable for conveying viscous media with inherent lubrication. When exposed to microscopic impurities in electrolytes, metal friction surfaces face severe wear and scratching, causing significant internal leakage and a drastic performance drop under high system pressure.
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Three Electrolyzer-Grade Technological Breakthroughs & Customer Feedback

JONSN's solid technical advantages for ALK hydrogen production come from a fully redesigned material stack (UK Victrex wear-resistant PEEK + 100% Zirconia nano-ceramic shaft pins) and a fully integrated two-stage housing with magnetic static leak-free seal, validated by a 300-unit bulk order from Tianjin Hydrogen Energy in July 2024.

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MATERIAL INNOVATION
Victrex PEEK Gears + Zirconia Nano-Ceramic Shaft Pins
While typical peers or European pump brands use ordinary carbon-fiber filled PEEK with soft 316L stainless steel shafts that suffer circular wear and severe runout within 5-6 months under non-lubricating alkaline loops, completely destroying the pump head. JONSN molds gears with premium imported wear-resistant PEEK from UK Victrex via precision CNC hobbing and thermal treatment. Transmission shafts and pins utilize 100% high-strength Zirconia Nano-Ceramic ceramics, guaranteeing near-zero wear over an extended running cycle.
BEARING INNOVATION
Nano-Ceramic Formula Modified PEEK Plain Bearing
Abandoning traditional carbonfiber filled bearings, JONSN's self-developed sliding bearings, formulated from a confidential modified PEEK-ceramic recipe, deliver exceptional dry friction resistance and a verified continuous self-lubricating lifespan exceeding 20,000 hours.
SEALING INNOVATION
Two-Stage Housing + Magnetic Static Leak-Free Seal
JONSN completely overturns the conventional three-section structure with PTFE dynamic seals used for over 20 years, which is highly vulnerable to gasket thickness variation and severe internal leakage. JONSN utilizes a two-stage shell design with a Magnetically driven leak-freestatic seal. The inner clearance tolerances are rigidly locked by Japanese Mazak multiaxis machining centers, eliminating artificial adjustment and ensuring peak volumetric efficiency
CUSTOMER PROOF · BULK ORDER
Tianjin Hydrogen Energy · 300 MRV Pumps · July 2022
Tianjin Hydrogen Energy bulk ordered 300 MRV220 pumps in 2024 July. Pumps sustain 24/7 high-concentration KOH lye operation with stable flow against pressure fluctuation, realizing domestic replacement of imported brands for the ALK electrolysis hydrogen skid production line.

JONSN R&D Testing Center Verified Reference

Advanced Microfluidic Dynamics Validation and System Flow Calibration Datasheet

HYDROGEN DATASHEET
MRV · Verified ALK Electrolyzer Performance · Issued by JONSN R&D Testing Center

Factory calibration datasheet covering working medium, thermal range, differential pressure, theoretical vs. real flow, volumetric efficiency and motor spec — measured on a high-precision full-inspection calibration bench at JONSN's Ganzhou Intelligent Manufacturing Base, perfectly matching the harsh demands of 30% KOH alkaline electrolysis at 70-90°C continuous operation.

ParameterSpecification
Working Medium30% High-Concentration Alkali Solution (KOH)

Liquid Viscosity: 1.00 to 3000 mPa·s

Specific Gravity: 1.2 g/cm³

Design TemperatureOperating range: -40°C to 90°C
Differential PressureDesign differential pressure: 4 bar
Maximum system pressure capacity: 4 MPa
Pipe DimensionsSuction line length: 1 m (DN10 mm)
Discharge line length: 5 m
Theoretical Flow RateQ_th = 5.304 L/min
Real Flow RateQ_th = 5.004 L/min
Equivalent output: 300.240 L/h
Volumetric EfficiencyEffhydr = 94.3%
Absolute flow precision control under 4 bar low-viscosity differential pressure.
Motor SpecificationMotors can be selected based on working conditions, including brushless motors, AC motors, stepping/servo motors, variable frequency motors, and explosion-proof motors.
Hydrogen

Millimeter-Scale Space Dimensions Alignment

Millimeter-Scale Space Dimensions Alignment: Providing comprehensive 2D engineering drawings and clearance specifications to ensure seamless space co-design and reduce installation footprints for global hydrogen integrators.

How JONSN Guarantees Hydrogen Pump Quality?

Simulated by ANSYS, Sculpted by World-Class CNC Centers, Verified by ZEISS Metrology.

Two-Stage Structure & Precision Machining + Digital Quality Control
Advanced Manufacturing: Two-stage pump housings & flow paths processed by Japanese Mazak Multi-Axis CNC & Tsugami lathes, micron-level clearance via high-speed double-plane lapping to cut internal leakage & human error, completely eradicating dead volume and KOH-crystal trapping.
Rigid Quality Control: Operating under TÜV Rheinland ISO 9001:2015 compliance, JONSN executes a full-process digital "One Item, One Code" tracking system. All geometric parameters are inspected by German ZEISS CMM & Keyence digital coMParators at 22.7°C dust-free workshop, cross-batch deviation controlled within ±0.5% to guarantee consistent 24/7 electrolyzer mass-production safety.
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Tsugami

Global Classification Society & Industrial Certificates

JONSN micro gear pumps obtained Type Approval from CCS, BV, ABS, NK ,LR classification societies, fully compliant with strict global energy supply chain audit standards, offering low-TCO replacement solutions for harsh ALK electrolysis hydrogen loops and downstream hydrogen storage / transport systems.

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CCS
China Classification Society
Type Approval for hydrogen energy & marine-grade micro gear pump supply chains.
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BV
Bureau Veritas
Type Approval for global hydrogen production & ALK electrolyzer OEMs.
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ABS
American Bureau of Shipping
Type Approval for North-American hydrogen energy & offshore electrolyzer projects.
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NK
Nippon Kaiji Kyokai
Type Approval for Japanese & Asia-Pacific hydrogen infrastructure deployments.

Frequently Asked Questions

Why do JONSN pumps outperform diaphragm pumps in ALK electrolysis?

Diaphragm pumps create heavy pressure pulses; JONSN's magnetic static seal realizes full pulse-free delivery, meeting the 24/7 continuous run requirement of mass-production hydrogen electrolyzers without diaphragm fatigue or rupture.

How does JONSN resist anti-wear performance against 30% KOH?

Built with UK Victrex PEEK gears + 100% Zirconia ceramic shafts, JONSN pumps avoid metal runout and keep volumetric efficiency 94.3% without flow attenuation, even after long-cycle exposure to high-concentration alkaline lye.

Can JONSN pumps tolerate electrolyzer extreme temperature conditions?

Yes. Operating range -40°C - 160°C perfectly fits the alkaline cell core temperature zone (70-90°C working zone), maintaining stability under repeated thermal stress and online hot-water flushing cycles.

Does JONSN offer custom coMPact pump arrays for hydrogen container skids?

Yes. The MRV coMPact series is available for limited-space hydrogen skid and containerized electrolyzer assemblies. Submit the 5-item dynamic flow matrix to receive official CAD / 3D STEP models & wiring specifications within 24 hours to eliminate any space interference.

Please Contact Us!

ADDRESS

Building A3, Qiuyue Science and Technology Park, Ganzhou Economic and Technological Development Zone, Jiangxi Province

Tel.

0086-21-34720020

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