Diaphragm Valves

Pipestock’s range of polypropylene diaphragm valves delivers robust, reliable flow control for demanding chemical process and corrosive liquid applications. Engineered from high-grade polypropylene (PPH), these valves combine exceptional chemical resistance, abrasion tolerance and long-term performance across a wide range of aggressive fluids. Whether you need spigots or flanged end connections, and standard EPDM or high-performance PTFE seals, our diaphragm valve selection offers the flexibility your system deserves.

Ideal for use in hot corrosive liquid pipework, chemical dosing systems, process skids, waste treatment plants and industrial fluid lines, these valves are engineered to DIN 3442 and available in sizes from 20mm to 90mm, allowing precise flow regulation across a broad scope of installations.

Polypropylene is an industry-preferred material for corrosive environments due to its inherent resistance to acids, alkalis and solvents. Combined with the diaphragm design - which isolates the valve body from the fluid - this results in minimal wear, reduced maintenance and prolonged service life compared with traditional valves in harsh chemical conditions.

• Material: High-quality polypropylene (PPH) for superior chemical resistance
• Seal Options: Standard EPDM or PTFE for compatibility with a broad range of media
• Temperature Range: 0°C to 80°C for reliable operation across typical process conditions
• Standards: Manufactured to DIN 3442 for trusted quality and performance
• Colour: Beige-grey finish for easy identification in specialist plastics systems
• Sizes: From 20mm up to 90mm to fit a wide selection of PP pipework

Our PPH diaphragm valves are widely used for:

• Chemical processing and handling lines
• Corrosive liquid transfer and control systems
• Industrial wastewater treatment
• Laboratory and pilot plant installations
• Dosing and metering systems

Pipestock offers one of the broadest selections of diaphragm valves in the UK market. Whether you require EPDM seals for general chemical service, or PTFE seals for aggressive media compatibility, you’ll find the right valve for your application. All products are backed by comprehensive technical support and fast UK delivery options.