KMD 188 SED Diaphragm Valve

Pneumatically operated, plastic actuator directly mounted onto rvs body DN 8 - 20

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.


  • Efficient plastic piston actuator direct assembled with the valve body
  • Control air connectyion 90º to flow direction
  • Actuator high resistance to heat transfer
  • Smooth exterior design ideal for wash downs
  • Encapsulated diaphragm
  • Optical indicator
  • CDSA sealing concept

Technical Information

Sizes Body: 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)
Weight 0,6 kg
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 and bonnet: 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 configurations
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 188 Datasheet - DN 8-20 mm
English - 434 kB - TD06 0018 Rev. M