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The Cast Steel Accessible Feed Check Valve PN 40 Rating Outside Screw & Yoke Type Bolted Bonnet is specially designed for controlling boiler feed water flow and preventing reverse flow in steam and process systems. Manufactured from premium-grade cast steel, the valve offers excellent strength, durability, and dependable performance under medium and high-pressure operating conditions.

Featuring an Outside Screw & Yoke (OS&Y) mechanism with bolted bonnet construction, the valve ensures smooth operation, secure shut-off, and easy maintenance accessibility. It is widely used in boilers, power plants, steam distribution systems, and industrial process applications requiring reliable feed water control



The Cast Steel Accessible Feed Check Valve PN 40 Rating Outside Screw & Yoke Type Bolted Bonnet is a heavy-duty industrial valve engineered for precise feed water regulation and automatic backflow prevention in boiler and steam systems. Constructed using high-quality cast steel, the valve provides superior mechanical strength, pressure resistance, and long-lasting operational reliability in demanding industrial environments.

The valve combines manual flow regulation with automatic non-return functionality, ensuring controlled feed water supply while preventing reverse flow that could damage boilers and associated equipment. Its Outside Screw & Yoke (OS&Y) design keeps the stem threads external to the process media, reducing corrosion and enhancing operational safety. The bolted bonnet construction provides strong structural integrity and allows convenient inspection and servicing of internal components.

Designed with precision-engineered seating arrangements and durable internal mechanisms, the valve ensures tight shut-off performance, smooth operation, and minimal leakage. The accessible cover design simplifies maintenance and internal cleaning without removing the valve from the pipeline. Its robust construction offers excellent resistance against steam pressure, temperature fluctuations, corrosion, and industrial wear.

Widely used in industries such as power generation, steam boilers, petrochemicals, refineries, chemical processing, marine systems, and industrial process plants, the Cast Steel Accessible Feed Check Valve PN 40 Rating Outside Screw & Yoke Type Bolted Bonnet is suitable for handling boiler feed water, steam, condensate, and industrial fluids. It serves as an ideal solution for applications requiring controlled feed regulation, backflow prevention, operational safety, and dependable industrial performance.


Component / Standard Specification
BODY / COVER ASTM A 216 Gr WCB
TRIMS 13 Cr
MFG STD FLOLINK / 015
INSP & TEST STD FLOLINK / 015
ENDS FLANGED TO DIN 2532 / 2533
HYD-TEST PRESSURE BODY : 854 Psig (60 Kg / Cm²)
SEAT : 569 Psig (40 Kg / Cm²)
SIZE RANGE 25 MM to 65 MM

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