Steripur 217.25 SED Diaphragm Valves

Pneumatical operated with Stainless steel Bonnet and Actuator

SED Diaphragm Valves

Romynox delivers Steripur diaphragm valve series SED for high purity applications in the pharmaceutical, food, fine chemical and cosmetic industries. This valve is available in two different designs. The type 217.30 is available in the control function fail safe close (normally closed) and performs at a higher working pressure for standard application. The type 217.25 in control function fail safe close is mainly designed for filling applications or all other where the working pressure is lower.

One advantages of this design are a longer diaphragm life time because there spring force is less. Other advantages of this design are a very high cycle life and a smaller overall dimensional height. Type 217.25 is also available in control functions fail safe open and double acting for standard working pressures.

The valve is predestined for applications with high purity, dirty and aggressive fluids, and gases. Smooth surfaces, no explored nuts, no edges, and outside self-draining in all assembly, positions describe the optimised wash down design. The Steripur is used where diaphragm valves entirely of stainless steel add value, such as clean rooms or aggressive (corrosive) environment.


  • High cycle stainless steel piston actuator
  • Compact design
  • Low control air volume, high switching speed
  • High repeatablity
  • Control air connection on the top
  • Direction of control air connection is mountable in 90° rotations
  • CDSA sealing concept
  • Flexible diaphragm suspension
  • Clean and polished exterior design ideal for sterile wash downs

Technical information

Sizes Tube: 1/4" to 1/2", DN 4 to DN 15
Diaphragm: MA 8
Max. Pressure 8 bar (EPDM)
7 bar (PTFE/EPDM)
Temp. range -20 ºC to 140 ºC (EPDM)
-20 ºC to 150 ºC (PTFE/EPDM)
Type of connections Tri-clamp connection (ISO, ASME-BPE, DIN 32676), Flange, Butt Weld
Weld connections ISO 1127, ASME-BPE, DIN 11850, BS-4825, SMS 3008
Material - Body, connections: 316L (1.4435) Forged
- Bonnet: 316L (1.4435)
- Actuator: 316L (1.4435)
- Membranes: EPDM, PTFE/EPDM
Finishes Interior surfaces SF1
Operation Pneumatic Actuator
Control function Normally Closed, Normally Open or Double Acting
Certificates (standard) 3.1 material, FDA, USP Class VI 121 ºC, {87}, {88}, EHEDG, PED, CE1935/2004, TSE/BSE
Certificates (optional) 2.2 surface finish, ATEX 2GD



  • Investment cast
  • Surface finish Ra value to max 0.25 μm
  • Other materials
  • Client specific connections
  • Available with a wide range of control equipment and accessories
  • Autoclavable
  • Type 217.25 is also available in control functions 'fail safe open' and 'double acting for standard working pressures

pdfSteripur 207-25 Datasheet - DN 4-15 mm
English - 767 kB - TD06 0018 Rev. M