Global Website


Asia - Pacific


Global - English

Asia - Pacific


APV SD4 Double Seal Valve

  • APV DELTA SD4 Mixproof Valve


Image 1of 1
  • APV DELTA SD4 Mixproof Valve
  • SD4 Valve Maintenance Video Icon
  • SD4 Valve Operation Icon
  • SD4 Valve Operation Icon
  • SD4 Valve Operation Icon
  • SD4 Valve Operation Icon
video player
Product Type:

double seal valves

Safe flow valve for safe media separation.
We are here to help
Find your local representatives within your region for product inquiries.

APV DELTA SD4 valves are (double seal) safe flow valves designed for safe media separation applications in the food, beverage, dairy, pharmaceutical and chemical industries. It is available as a shut-off, change-over and tank bottom valve. Other configurations are available on request.

The APV DELTA SD4 valve is available as a shut-off valve in 4 standard housing configurations. Other configurations are available on request.´


  • Leakage chamber arranged between the seat seals; the leakage chamber being forcibly closed (open valve) by the two leakage discharge valves (NO) or opened to the atmosphere (closed valve).
  • Excellent hygienic characteristics primarily due to the ball-shaped housing without sump or dome.
  • Profile seat seals providing crevice-free sealing and the compression of the seat seals is controlled by a metallic stop.
  • Leakage discharge valves to drain the neutral area between the seat seals. The leakage discharge valves (activated together with main actuator) are also used as flush - enabling CIP and SIP cleaning of the neutral area.
  • Actuator and control unit are standard parts from the SW4 product line. Additionally, a NOT element is fitted to the control unit as standard enabling to maintain higher line pressures.

All product-wetted parts are made of AISI 316L / 1.4404 (DIN EN 100888). Seat seal materials are EPDM (standard), HNBR, VMQ, FPM (options).

Available in DN 25 – DN 100, 1” – 4”.

Valve variants:

  • Standard shut-off version: SD4, SDE4
  • Long stroke shut-off version: SD4
  • Aseptic version (with PTFE diaphragm support): SDMS4
  • Change-over version: SDU4
  • Tank bottom version: SDT4

SD4 Double Seal Valve Maintenance Procedures - English

SD4 Double Seal Valve Maintenance Procedures - Chinese

SD4 Double Seal Valve Operation Animations