SED – Steripur 417 Diaphragm valve

Pneumatically operated, Stainless steel DN 15 - 50


  • High cycle stainless steel piston actuator
  • Compact design
  • Advantages in mulitport bodies and manifold valve assemblies
  • Control air connection in flow direction
  • CDSA sealing concept
  • Flexible diaphragm suspension
  • Encapsulated diaphragm
  • 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




ROMYNOX delivers Steripur diaphragm valve series SED for high purity applications in the pharmaceutical, food, fine chemical and cosmetic industries. Compact design, the outside diameter of the actuator is the same size as the bonnet flange. The Steripur is used where diaphragm valves entirely of stainless steel add value, such as clean rooms or aggressive (corrosive) environment.


Smooth surfaces, no explored nuts, no edges, and outside self-draining in all assemblies gives an optimised wash down design. The outside diameter of the actuator is the samen size as the bonnet flange. This gives advantages in multiport bodies and manifold valve assemblies.

The Steripur 417 DN 15 – 50 mm is the new design of the former Steripur 407 DN 15 – 50 mm.

Technical information

SizesDN 15 to DN 50 (3/4″ to 2″)
Max. Pressure10 bar (EPDM)
8 bar (PTFE/EPDM)
Temp. range-20 ºC to 140 ºC (EPDM)
-20 ºC to 150 ºC (PTFE/EPDM)
Material– Body, connections: 316L (1.4435) Forged
– Bonnet: 316L (1.4435)
– Actuator: 316L (1.4435)
– Membranes: EPDM, PTFE/EPDM
type connectionsTri-clamp connection (ISO, ASME-BPE, DIN 32676), Flange, Butt Weld
weld connectionsISO 1127, ASME-BPE, DIN 11850, BS-4825, SMS 3008
surface treatmentinternal surface finish SF1
controlsPneumatic Actuator
Control functionNormally Closed, Normally Open or Double Acting
actuator suitable forTwo-Way bodies, welded configuraties, T-bodies, Multiport bodies, Tank bottom bodies
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 materials
  • Surface finish Ra value to max 0.25 μm
  • Client specific connections
  • Available with a wide range of control equipment and accessories, also for retrofitting
  • Control air connection 90° to flow direction
  • Autoclavable