SED – ZDL T-valve Zero Dead Leg Diaphragm valve

T-diaphragm valve ZDL with stainless steel or plastic actuator


  • Customer’s specific design
  • Compact design and smaller envelope dimension is achievable with the Steripur Series actuators
  • Combination of many different nominal diameters
  • Optimized drainability
  • Minimized dead leg
  • Reduces surface contact, hold up volume and cross contamination of the product
  • Reduction of fittings, tubing and field welds in the system
  • Reduces qualification and validation documentation requirements
  • All end connections and materials are available according to the customer’s specification





316L (1.4435)


Actuator, Manual

Weld connection

ASME-BPE, DIN 11850, SMS 3008


ROMYNOX delivers the T-valve, with zero dead leg, of SED for high purity applications in the pharmaceutical, food, fine chemical and cosmetic industries.

The zero dead leg 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 actuators for valves ZDL are part of the KMA or Steripur Series of SED. The SED T-diaphragm valves are also available with a casting body. This is an unique product of SED.

Technical information

Sizes1″ to 3″, DN 25 – DN 80
Max. Pressure10 bar
Temp. range-20 ºC to 140 ºC (EPDM)
-20 ºC to 150 ºC (PTFE/EPDM)
Type of connectionsButt Weld
Weld connectionsASME-BPE, DIN 11850, SMS 3008
Material– Body, connections: 316L (1.4435) Forged or casting
– Bonnet: 316L (1.4435)
– Membranes: EPDM, PTFE/EPDM
FinishesInterior surfaces SF1
OperationManual 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


  • Handles; control valve or open-close signaling
  • materials: 904, hastelloy
  • Special versions: customization are always possible