This product is an industrial - grade corrosion - resistant handwheel plastic one - piece flange diaphragm valve. It is specifically designed for the transportation of strong acids, strong alkalis, organic solvents, and high - purity media.
The valve body is made of PPH (polypropylene homopolymer reinforced) or PVDF (polyvinylidene fluoride), combined with an EPDM/FKM diaphragm. This configuration ensures excellent corrosion resistance and a long service life.
It is suitable for harsh working conditions in industries such as chemical engineering, electroplating, pharmaceuticals, and environmental water treatment.
✅ All - plastic One - piece Structure
The valve body, bonnet, and handwheel are all made of PPH/PVDF, with no metal components, eliminating the risk of electrochemical corrosion.
It features flange connections (in accordance with the standard HG/T20592), ensuring easy installation and reliable sealing.
✅ Superb Corrosion Resistance
- PPH: Resistant to strong acids (such as sulfuric acid and hydrochloric acid) below 80℃, weak alkalis, and some organic solvents.
- PVDF: Can withstand high temperatures up to 120℃, resist strong oxidants (such as concentrated nitric acid and hydrogen peroxide), and organic solvents (such as acetone and benzene).
✅ Zero - leakage Design
- EPDM diaphragm (resistant to ozone, weak acids, and alkalis) or FKM diaphragm (resistant to oil, strong acids, and alkalis) ensures 100% sealing.
- The dead - free flow passage prevents medium residue and complies with FDA/EHEDG hygiene standards.
✅ Precise Manual Control
- Operated by a handwheel, it is easy to open and close (torque ≤ 5N・m) and supports frequent adjustments.
- An optional visible dial allows for fine - tuning of the flow rate.
✅ Long - lasting & Easy Maintenance
- The diaphragm can be quickly replaced without disassembling the valve body, reducing maintenance costs by 50%.
- It has a lifespan of ≥ 5 years in corrosive media under normal operating conditions.
- Chemical Industry: Transportation of sulfuric acid, hydrochloric acid, and sodium hypochlorite.
- Electroplating Industry: Plating solution circulation and waste acid treatment.
- Pharmaceutical Industry: Pipelines for high - purity liquid medicine.
- Environmental Water Treatment: Sludge dosing and acid - base neutralization systems.
![Structural pictures of flanged diaphragm valves]()
![Flange diaphragm valve parameter pictures]()