Diaphragm valves are the first choice for applications that require maximum tightness, hygiene and process reliability. They are free of dead spaces, soft-sealing and glandless – ideal for aggressive, corrosive and sterile media. Whether chemical, pharmaceutical, food or water treatment: our selection includes manually and pneumatically actuated valves in various materials and designs.
| Feature | Type 671 | Type 675 | Type 695 | Type 687 | SISTO-16 |
| Nominal pressure | PN 10 | PN 16 | PN 16 | PN 16 | PN 16 PN 10 (DN 250 – DN 300) |
| Nominal size | DN 10 – DN 100 | DN 15 – DN 150 | DN 15 – DN 65 | DN 10 – DN 100 | DN 15 – DN 300 |
| Temperature | -10 °C to +80 °C | -10 °C to +100 °C | -10 °C to +150 °C | -20 °C to +150 °C | -10 °C to +160 °C |
| Material | Metal, plastic drive | Cast iron, ductile iron | Stainless steel 1.4408 | Electropolished stainless steel | EN-GJL-250, EN-GJS-400, stainless steel |
| Gasket | EPDM, PTFE/EPDM | EPDM, PTFE/EPDM | EPDM, PTFE/EPDM | EPDM, PTFE/EPDM | EPDM, FKM, TFM/EPDM |
| Special feature | Optical position indicator, compact | Robust handwheel, optimized for emptying | Pneumatic, CIP-capable, ATEX option | CIP/SIP-capable, sterile applications | Dead space-free, TA-Luft, long service life |
for hygienic processes
due to high-quality materials
Manual, pneumatic or electric
for potentially explosive atmospheres
thanks to chambered membranes
In addition to high-quality diaphragm valves, we develop complete SKID systems and modular process systems – tailored to your application. Proven components such as butterfly valves, ball valves and diaphragm valves are used, with automation by pneumatic or electric actuators on request. Our solutions combine precise control, compact design and easy maintenance – ideal for chemical, energy and water technology as well as many other industries.
Aggressive, corrosive, sterile and abrasive media as well as water, steam and technical gases.
Yes, especially the stainless steel versions such as GEMÜ 695 and 687.
EN 1092, ISO 5752, TA-Luft, ATEX and DGRL.
Yes, pneumatic and electric actuators are available.
Take into account the medium, temperature, pressure, connection type and hygiene requirements. Stainless steel valves (e.g. GEMÜ 695) are recommended for aggressive media, CIP/SIP-capable variants (e.g. GEMÜ 687) for sterile processes, and the SISTO-16 from KSB for large nominal sizes.
