Working principle:
◎Seat valves are operated automatically by a single-acting or a double-acting pneumatic actuator. By supplying compressed air, the shaft is moved to turn valve to the "on" or "off" position.
◎The 180°rotation of the pneumatic cylinder can make normally open and normally closed interchangeable.

Design and features:
◎Compact and robust design. 3A certified.
◎Available sizes: from DN 25/1" to DN 100/4".
◎Normally closed valve (NC) is the standard version.
◎The valve can be changed to normally open (NO) by simply reversing the position of the pneumatic actuator.
 ◎Hygienic design according to 3A standards.
◎360° adjustable body.
◎Open window allows visual inspection of the shaft sealing.
◎Easily assemble/disassemble the internal parts by loosening the clamp.
◎Welded connections (mm or inches).

Materials
◎Parts in contact with medium: AISI 316L
◎Other parts: AISI 304
◎Gasket: EPDM according to FDA 177.2600
◎Internal surface finish: Ra ≤ 0.8 μm
◎External surface finish: bright polish
Technical specifications:
◎Available sizes：DN 25 - DN 100 DN 1"- DN 4"
◎Working temperature：-10 ℃ to +120℃ (EPDM) 1 4°F to 248 °F+140 ℃ (SIP, max. 30 min) 284 °F
◎Max. working pressure：10 bar 145 PSI
◎Compressed air pressure：6-8 bar 87-116 PSI
◎Air connecitons：G1/8" (BSP)
Options:
◎Gaskets: FPM (Viton (R)) in compliance with FDA 177.2600
◎Connections: DIN, Clamp, SMS, RJT, FIL-IDF, etc. Recommended configuration
◎Double-acting pneumatic actuator.
◎"Twin-Stop" actuator.
◎External position sensors.
◎Steam barrier (if shaft sterilisation is required).
◎Jacketed body.
◎C-TOP control unit.
◎Surface finish: Ra ≤ 0,5 μm
◎Manual actuation.
◎Material and roughness certificates.
Operating principle:
◎The valve body combination is also suitable for the divert seat valve manually.
◎The valve body combination with 20 type and 30 type is single-seat valve.
◎The valve body combination with 21 type,22 type, 31 type and 32 type is double-seat valve.
Below combination it is reference for diagram of fluid.