icon-Tight shut-off, throttle and control valves


Ideal protection from backflows for steam turbines

Extremely reliable check valves are needed to protect steam and gas turbines from reverse flows. With their reliable, non-jamming closures, our SCV valves are optimally designed to fulfil this important protective function.

SCV check valves efficiently protect steam and gas turbines from backflows coming from steam extraction pipes. This is guaranteed by a free-swinging model that closes automatically by means of its own weight. This enables it to swing closed against a double bearing friction moment without the assistance of a drive system. This makes extremely short closure times of under 0.5 seconds possible.
A hydraulic or pneumatic drive can be added as a closure aid by means of a two-part stem construction.

The SCV is a robust cast valve with butt-welded ends.
Welding neck flanges can be welded on.
The valve disc made of chrome steel reduces abrasions.

The valve discs of installed valves can be replaced via the inspection and assembly opening.
The seal seat is manufactured by deposit welding and can be hard-coated if necessary.

• Tightness at least in accordance with
ANSI/FCI 70-2 Cl. V

• No jamming at seat

• Low pressure loss due to overrunning clutch

• High resilience to temperatures

• Fireproof design

• Low drive torque

• Compact, robust design

• Minimal maintenance; on-site maintenance possible

• Inspection and assembly opening

150 mm / 6 inches up to 1050 / 42 inches

Temperature range
Steam up to 550 °C / 1,025 °F

Pressure Class
PN 10/16/25/40/64/100
ANSI 150/300/600/900

Construction lengths in accordance with
DIN EN 558 table 8

Valves designed in accordance with international
standards, e. g.
AD technical instructions, ANSI, API, ASME, ATEX,

Self-closing, pneumatic, hydraulic

- free swinging design
- pneumatic spring return actuator as closing assistance
- welding flanges
- duct for condense water release