KMD 402 SED Diaphragm Valve

Pneumaticalluy operated, Plastic piston actuator direct assembled onto the valve body

SED Diaphragm Valves

Romynox delivers the KMD series of SED Flow Control for high purity applications in the pharmaceutical, food, fine chemical and cosmetic industries. Specialty of the KMD- series of SED is the plastic actuator. Compact design, the outside diameter of the actuator is the same size as the bonnet flange.


  • Plastic piston actuator 
  • Compact design
  • Actuator high restistance to heat transfer
  • Control air connection in flow direction
  • CDSA sealing concept
  • Flexible diaphragm suspension
  • Encapsulated diaphragm
  • Smooth exterior design, ideal for wash downs

Technical Information

Sizes IMP 3/4" to 21/2"-, DN 15 to DN 50
Diaphragm: MA 25, MA 40, MA 50
Max. Pressure 10 bar (EPDM)
8 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
- Actuator: Polyarylamide (Ixef)
- Membranes: EPDM, PTFE/EPDM
Finishes surface finish Ra value to max 0.25 μm
Operation Pneumatic Actuator
Control function Normally Closed, Normally Open or Double Acting
Actuator suitable for Two-Way bodies, Welded connections
Certificates 3.1, FDA, USP Class VI, CE / PED



  • Investment cast
  • Other materials
  • Client specific connections
  • Available with a wide range of control equipment and accessories, also for retrofitting
  • Control air connection in flow direction

pdfKMD 402 Datasheet - DN 15-50 mm
English - 415 kB - TD06 0018 Rev. M