Check Valves0 pages

Bulletin 8K

Check Valves
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PROTECT EQUIPMENT FROM BACKFLOW
DAMAGE IN STEAM AND WATER LINES

• RAPID AUTOMATIC CLOSURE IN RESPONSE TO
BACK FLOW OR ACTUATOR CONTROLLED
CLOSURE TO ALLOW TWO- WAY FLOW
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VARIETY OF CONFIGURATIONS AVAILABLE TO
MEET CRITICAL APPLICATION REQUIREMENTS

Description
Schutte & Koerting Check Valves prevent backflow
in steam and water lines to protect valuable
equipment from damage.
Used in extraction lines from steam turbines to
feedwater heaters, heating systems or process
equipment, these valves are engineered for
exceptional reliability.
Under normal flow conditions, a counterbalance
weight holds the disc in position for free flow of
steam or water. However, the slightest back flow will
cause the disc to close tightly against the seat,
preventing reverse flow through the valve.
Where reverse flow is desired, the valves can be
configured to remain open until closed by a cylinder
actuator on signal.
S&K check valves are available in a variety of
configurations for suitability to your application
requirements.
In addition, they can be
manufactured with soft packing, hardened leak-off
bushings, and various materials for critical
applications.
Complete physical testing offered by S&K includes
hydrostatic and pneumatic testing as well as
magnetic particle (magnaflux) and radiographic (xray) inspection. All models are ANSI rated.

The basic Type 828 Check Valve protects against
back flow of steam or water. The weight linked to
the disc provides a delicate counterbalance to the
weight of the disc itself. With normal flow in the
proper direction the disc swings open to permit full
flow. The slightest back flow will close the disc
tightly against the seat, preventing reverse flow
through the valve.
In applications where a controlled reverse flow is
desired, these valves can be arranged to remain
open until closed by a cylinder actuator on signal.
Typical “hold open” arrangements are described on
page 3.
In other applications these valves have been
equipped with a spindle to act as both a stop and
check valve.

Schutte & Koerting • 2510 Metropolitan Drive • Trevose, PA 19053 • USA • tel: (215) 639-0900 • fax: (215) 639-1597 • www.s-k.com • sales@s-k.com

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