SED – Steripur 317 Diaphragm valve

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


  • 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


Suitable for

Multiport bodies, T-bodies, Tank bottom bodies, Two-way bodies, Welded configurations


Butt Weld, Flange, Tri-Clamp


SF1, SF4

Man. process



316L (1.4435)



Weld connection

ASME-BPE, BS-4825, DIN 11850, ISO 1127, SMS 3008




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, this makes for a very 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.

Technical information

seizetube: IMP 3/8″ tot 3/4″, DN 8 tot DN 20
Membrane: MA 10
Max. Pressure8 bar (EPDM)
7 bar (PTFE/EPDM)
Temp. range-20 ºC to 140 ºC (EPDM)
-20 ºC to 150 ºC (PTFE/EPDM)
weight1 kg
type of connectionsTri-clamp connection (ISO, ASME-BPE, DIN 32676), Flange, Butt Weld
weld conectionsISO 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
surface treatmentinternal surface finish SF1
controlPneumatic Actuator
Control functionNormally 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