Romynox delivers the SISTO-CT-valve with zero dead leg for high purity applications in the pharmaceutical, food, fine chemical and cosmetic industries.
The SISTO-CT diaphragm valves are usually used as a point of use in a WFI loop system. It can also be used as a drain point in other systems. The operation can be manual or pneumatic actuator.

  • Forged stainless steel body (1.4435)
  • Design allowing the installation of an enclosed diaphragm
  • Optimised hydraulic design
  • No dead volume
  • Weld ends or clamps in accordance with different standards
  • DN 6 to DN 200

Technical Information

Sizes 1/3" to 8" (DN 6 to DN 200)
Max. Pressure 16 bar
Temp. range
  • 20 ºC to 140 ºC (EPDM)
  • 20 ºC to 150 ºC (PTFE/EPDM)
Type of connections Butt Weld
Weld connections ISO 1127, ASME-BPE, DIN 11850
  • Body, connections: 316L (1.4435)
  • Bonnet: 316L (1.4435)
  • Hand wheel: Plastic PA6GF30 or Stainless steel 1.4409
  • Membranes: EPDM, PTFE/EPDM
Finishes Surface finish SF1
Operation Manual or Pneumatic Actuator
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


  • Actuator accessoire: SK-i box
  • Other materials: 904, Hastelloy
  • Certificates:surface finish certificaat, ATEX
  • Special versions: customization is always possible

pdfDatasheet SISTO C T-valves - ZDL
English - 1,1 MB - Rev. 8652.10/05-DE EN / 01.09.2017

pdfSISTO C T-Valves - ZDL
English - 661 kB - Rev. 8652.10/06