Check Valves
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PHOTO SHOWS SPECIFICATION AS BELOW
SIZE:30″
RATING:600LB
BODY AND BONNET : ASTM A216 WCB
DISC: ASTM A216 WCB+STELLITE 6
SHAFT: ASTM A182 F6A
SEAT: ASTM A105+STELLITE 6
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PHOTO SHOWS SPECIFICATION AS BELOW
SIZE:12″
RATING:600LB
BODY AND BONNET : ASTM A216 WCB
DISC: ASTM A216 WCB+STELLITE 6
SHAFT: ASTM A182 F6A
SEAT: ASTM A105+STELLITE 6
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PHOTO SHOWS SPECIFICATIONS AS BELOW
SIZE:1″
RATING:150LB
BODY AND BONNET : ASTM A105
DISC: ASTM A105+STELLITE 6
SPRING: INCONEL X-750
SEAT: ASTM A105+STELLITE 6
LIFT/PISTON TYPE
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PHOTO SHOWS SPECIFICATIONS AS BELOW
SIZE:4″
RATING:125LB
BODY AND BONNET : ASTM 536 65-45-12
DISC: ASTM 536 65-45-12 + BRONZE B62/B148
SHAFT: BRONZE B62/B148
SEAT: BRONZE B62/B148
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PHOTO SHOWS SPECIFICATIONS AS BELOW
SIZE:24″
RATING:600LB
BODY AND BONNET : ASTM A216 WCB+STELLITE 6 HF
DISC: ASTM A351 CF8M + STELLITE 6 HF
SHAFT: ASTM A182 F6A
SEAT: STELLITE 6 HF
SPRING: INCONEL X-750
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SAMPLE SPECIFICATIONS
SIZE: DN25 DN40
RATING: PN16
END: BW AS PER B16.25
TEMPERATURE: -196 ℃
BODY AND BONNET : ASTM A351 CF8
PLUG: ASTM A182 F304+HF
SEAT: PCTFE OR HF METAL
ACTUATION: SPRING LOADED
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SAMPLE SPECIFICATIONS
SIZE: DN20
RATING: PN420
END: BW AS PER B16.25
TEMPERATURE: -196 ℃
BODY AND BONNET : ASTM A182 F304
PLUG: ASTM A182 F304+HF
SEAT: PCTFE OR HF METAL
ACTUATION: SPRING LOADED
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Size: 8" (DN 200)
Pressure Rating: 2500LB (ASME B16.34)
Key Materials:
Body: ASTM A350 LF2
Bonnet: ASTM A350 LF2
Disc: ASTM A350 LF2 + STL.6 HF
Stem: AISI 410
Seat: ASTM A350 LF2 + STL.6 HF
Actuation: Self-operated
Connection End: Butt Weld (BW)
Design Configuration: Single disc, swing type
Surface Treatment: Sandblasted + epoxy coating
Temperature Range: -46°C to +425°C (-50°F to +800°F)
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PHOTO SHOWS SPECIFICATIONS AS BELOW
SIZE:8″
RATING:150LB
BODY AND BONNET : ASTM A351 CF8+STELLITE 6 HF
DISC: ASTM A351 CF8 + STELLITE 6 HF
SHAFT: ASTM A182 F316
SEAT: STELLITE 6 HF
SPRING: INCONEL X-750
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1. Sealing System
o Pure FKM (Viton®) seats bonded directly to C95800 discs
o Zero metal sealing components – eliminates galling risk
o Leakage rate: ≤ 0.01 ml/min per inch seat dia. (Class VI)
2. Simplified Disc Design
o No Stellite hardfacing – cost-optimized for non-abrasive services
o Disc surface: Machined to Ra 3.2 μm for optimal rubber adhesion
3. Standard Hinge Mechanism
o No torsion springs (non-slam feature removed)
o Gravity-assisted closing (vertical installation required for optimal performance)
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SAMPLE SPECIFICATIONS
SIZE: 2″
RATING: 900LB
END: RF AS PER ASME B16.5
TEMPERATURE: -196 ℃
BODY AND BONNET : ASTM A182 F304
PLUG: ASTM A182 F304+HF
SEAT: PCTFE OR HF METAL
ACTUATION: SPRING LOADED
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PHOTO SHOWS SPECIFICATIONS AS BELOW
SIZE:DN100
RATING:PN16
BODY AND BONNET : ASTM A536 65-45-12
DISC: ASTM A536 65-45-12
SHAFT: 416SS
SEAT: EPDM
A check valve, also known as a non-return valve, is a type of valve that allows fluid or gas to flow in one direction only, preventing backflow that could damage equipment or disrupt system performance. It operates automatically and doesn’t require manual or external control. Inside the valve, a disc or similar mechanism opens when fluid flows in the intended direction and closes if the flow reverses. There are several types of check valves, such as swing, lift, ball, and diaphragm types, each designed for specific applications or media. For instance, swing check valves are commonly used in water and wastewater systems, while lift check valves are more suitable for high-pressure lines. Check valves are critical in protecting pumps, compressors, and pipelines from backflow damage, maintaining pressure, and preventing contamination. Their simple, self-operating design makes them ideal for both industrial and domestic use, especially in systems where reliability and safety are essential.
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