SED – Steripur 407 Diaphragm valve

Pneumatically operated, Stainless steel Actuator and Valve, DN 65 - 100


  • 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




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. The Steripur is used where diaphragm valves entirely of stainless steel add value, such as clean rooms or aggressive (corrosive) environment.


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 makes for a very optimised wash down design.

Technical information

seizeIMP 21/2′ – 4″, DN 65 – 100
Membrane: MA 80, MA 100
Max. PressureDN65-DN80:
7 bar (EPDM)
6 bar (PTFE/EPDM)
6 bar (EPDM)
5 bar (PTFE/EPDM)
Temp. range-20 ºC to 140 ºC (EPDM)
-20 ºC to 150 ºC (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
Material– Body, connections: 316L (1.4435) Forged
– Bonnet: 316L (1.4435)
– Actuator: 316L (1.4435)
– Membranes: EPDM, PTFE/EPDM
surafce treatmentinternal surface RA value till max 0,25
controlPneumatische Actuator
actautor suitable forTwo-Way bodies, Welded configuraties, T-bodies, Multiport bodies, Tank bottom bodies
Control functionNormally Closed, Normally Open or Double Acting
Certificates3.1, FDA, USP Class VI, CE / PED


  • Investment cast
  • Other materials
  • Client specific connections
  • Available with a wide range of control equipment and accessories
  • Control air connection 90° to flow direction
  • Autoclavable