Steripur 317 SED Diaphragm valves

Pneumatically operated with stainless steel Bonnet and Actuator - DN 8 - 20 mm

SED Diaphragm Valves

Romynox delivers Steripur diaphragm valve series SED for high purity applications in the pharmaceutical, food, fine chemical and cosmetic industries. The Steripur 317, for use in sizes DN 8 - 20, has a compact design; the outside diameter of the actuator is the same size as the bonnet flange.

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

The Steripur 317 is the new version of the Steripur. 307 The technical data stayed the same. The 317 has the control air on the top, which makes it overall easier to install and to insulate the pipeline.


  • High cycle stainless steel piston actuator
  • Compact design
  • Advantages in multiport bodies and manifold valve assemblie
  • Control air connection is in flow direction
  • CDSA sealing concept
  • Flexible diaphragm suspension
  • Clean and polished exterior design ideal for sterile wash downs


Technical information

Sizes 3/8" to 3/4", DN 8 to DN 20
Diaphragm: MA 10
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
  • Other alloys, materials
  • Surface finish Ra value to max 0.25 μm
  • Client specific connections
  • Available with a wide range of control equipment and accessories
  • Control air connection 90° to flow direction
  • Autoclavable

pdfSteripur 317 Datasheet - DN 8-20 mm
English - 462 kB - TD06 0018 Rev. M