Check Valve

Check Valve

A check valve, clack valve, non-return valve, reflux valve, retention valve or one-way valve is a valve that normally allows fluid to flow through it in only one direction. Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Check valves are often part of common household items.

A swing valve is a check valve in which the disc, the movable part to block the flow, swingson a hinge or trunnion, either onto the seat to block reverse flow or off the seat to allow forward flow. The seat opening cross-section may be perpendicular to the centerline between the two ports or at an angle.

OGV Swing Check Valves are quiet operating valves that effectively prevent backflow. The “flapperless” design is gentle on the seat as the piston rises and lowers with increased and decreased flow rates.

Standard Specifications

Basic Design API 6D/BS 1868
Face-to-Face Dimension ANSI B16.10
Flange End Dimension ANSI/ASME B16.5 (1” to 24”)
ANSI/ASME B16.47 (26” & up)
Butt-Weld End Dimension ANSI/ASME B16.25
Inspection & Testing API 598

Swing Check Valve Expanded View

Bill of Material

No. Part Name Material
1 Body A216 WCB A352 LCB A351 CF8M A217 WC6
2 Nut A194 2H A194 7 A194 8M A194 4
3 Bolt A193 B7 A320 L7 A193 B8M A193 B16
4 Disc A216 WCB+13Cr A352 LCB+13Cr A351 CF8M A217 WC6+STL
5 Pin A182 F6a A182 F6a SS 316 A182 F6a
6 Arm A216 WCB A352 LCB A351 CF8M A216 WCB
7 Hinge Pin A182 F6a A182 F6a SS 316 A182 F6a
8 Yoke A216 WCB A352 LCB A351 CF8M A217 WC6
9 Hex Bolt Carbon Steel Carbon Steel SS 316 Carbon Steel
10 Gasket 304+Graphite 304+Graphite 316+Graphite 304+Graphite
11 Cover A216 WCB A352 LCB A351 CF8M A217 WC6
12 Lifting Lug Carbon Steel Carbon Steel Stainless Steel Carbon Steel
13 Nut A193 B7 A320 L7 A193 B8M A193 B16