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VA diaphragm pump

Category: VA
Updated: 2026-06-06


HENNVI VA Series Oil-Free Lubricated Pneumatic Diaphragm Pump,Oil-free pressure chamber and ceramic ball valve wear-resistant structureStable operation at low speeds without lag, easy and streamlined parts assembly, and strong self-priming suction. The pump body is available in PP/PVDF/316 stainless steel/acetal and other fully corrosion-resistant materials, with diameters of 1/4"~3" and multiple specifications, flow coverage of 1~1000L/min, suitable for conveying acidic and alkaline solutions, organic solvents, and viscous slurries. With its oil-free and lubricating-free design, it is widely used in chemical dosing scenarios, PCB chemical solution conveying, electroplating agent dosing, environmental wastewater chemical additive, and fine chemical slurry transfer scenarios.


Product Details

1. Five core product advantages✅

  1. Oil-free cavity and lubrication-free structure: The design of the oil storage pressure chamber is cancelled, and the whole machine does not require lubricating oil. It prevents oil from being mixed into the transportation medium, ensures the purity of the liquid, and is suitable for food and high-purity chemical chemicals working conditions.

  2. Ceramic valve ball with high wear resistance: The pressure valve cavity is equipped with a ceramic ball valve, which is resistant to particle wear and acid and alkali corrosion. It can transport slurries and suspended liquids containing fine impurities, and the service life of the valve parts is greatly improved.

  3. Stable at low speed without holding the pump back: Low-voltage and low-speed drive structure, smooth operation without low-speed stagnation failure, uniform flow output, and stable metering and dosing accuracy.

  4. Streamlined parts and easy disassembly and assembly: The whole machine has a small number of parts. The diaphragm, valve ball and pump casing can be quickly disassembled and replaced. Daily maintenance is convenient and the shutdown loss is low.

  5. Super self-priming ability: Excellent self-priming structure, excellent dry suction start-up ability, can pump liquid at a low position and pump residual liquid at the bottom of the tank, without the need for a pre-positioned bottom valve.



2. Model code interpretation: VA-25-PP-PP-TF-TF

coding bitcode nameParameter DescriptionOptional material specifications
1VAProduct SeriesMicro pneumatic diaphragm pump
225Import and export caliber8(1/4")/10(3/8")/15(1/2")/20(3/4")/25(1")/40(1-1/2")/50(2")/80(3")
3PPPump body materialAC =ACETAL、PP =POLYPROPYLENE、AL =ALUMINUM、KY=PVDF、SS=SUS316、CL =CAST LRON
4PPValve seat materialAC=AETAL、PP=POLYPROPYLENE、HY =HYTREL、SP =SANTOPRENE
5TFBall valve materialAC=AETAL、HY=HYTREL、SS=SUS316、SP=SANTOPRENE、GE =GEOLAST,BN-BUNA-NVT-VITON、TF-TEFLON
6TFDiaphragm materialTF=TEFLON、HY=HYTREL,BN-BUN-nvt-viton、SP=santoprene、GE=geolasa



3. Performance curve description

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Note: Actual measured data of clean water at normal temperature shows that when conveying viscous and highly corrosive media, the actual flow rate drops by 15%~30%.



4. Application industry & after-sales guarantee

✅Application fields

  1. PCB / Plating: Quantitative dosing and transportation of etching liquid, passivation agent, and degreasing agent;

  2. Environmentally friendly water treatment: Dosing and delivery of flocculants, acid-base neutralizing agents, and defoaming agents;

  3. Fine chemicals: Sealed transportation of various solvents, pigment slurries, weak acids and strong alkali;

  4. Daily chemicals / medicine: Oil-free and pollution-free transportation of high-purity raw materials and paste additives.

✅Supporting services

  1. Customized selection: Select the pump body/diaphragm/valve ball material according to the corrosiveness of the medium, particle content, and flow head;

  2. Customized service: Special high temperature resistant material, explosion-proof customized model;

  3. After-sales warranty: Whole machine warranty, diaphragm, valve ball and other consumable parts are supplied with original factory ready-made products.


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