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 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.
•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