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Check valves
Valve-family illustration; does not verify the exact configuration, dimensions or stock availability.

Check valves

12 models in this family

Review the listed models and configurations in this family, then select one for a quotation request.

Selected model

Check valve 56 in, Class 600, WCB

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Check valve with the listed size of 56 in, pressure Class 600 and material designation WCB. This defines a specific enquiry configuration; connection type, operation and any additional requirements must be confirmed in the technical enquiry.

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Selected model specifications

Listed size56 in
Pressure class600
Listed material designationWCB

Models and configurations

Select a configuration. The family image changes only when the model has a distinct illustration.

Horizontal piston check, standard portInstallation orientation: Horizontal · Closure type: Piston or ball · Flow port: Standard · Cover construction: Bolted · Body and cover: ASTM A105N forged steel · Seat: Z12CF13 stainless steel · Piston or ball: Z20C13 / ASTM A276 Gr.420 · Gasket: Stainless steel and graphite · End connections: Threaded ASME B1.20.1 or socket-weld ASME B16.11Horizontal check valve with a standard flow port and piston or ball closure. The ASTM A105N body and bolted cover contain a Z12CF13 seat and Z20C13 piston or ball. A stainless-steel/graphite gasket seals the cover joint. The valve acts automatically with the flow direction and has no operating handwheel. Threaded and socket-weld end arrangements are provided for this version.
Horizontal piston check, full portInstallation orientation: Horizontal · Closure type: Piston or ball · Flow port: Full port · Cover construction: Bolted · Body and cover: ASTM A105N forged steel · Seat: Z12CF13 stainless steel · Piston or ball: Z20C13 / ASTM A276 Gr.420 · Gasket: Stainless steel and graphite · End connections: Threaded ASME B1.20.1 or socket-weld ASME B16.11Full-port horizontal check valve with piston or ball internal arrangements. The body and cover are ASTM A105N forged steel, the seat is Z12CF13 and the closure member is Z20C13. The bolted cover uses a stainless-steel/graphite gasket. The full flow port distinguishes this version. Operation is automatic, without a manual actuator, and the ends can be threaded or socket-weld.
Vertical ball check valveValve type: Vertical ball check · Flow port: Standard · Bonnet construction: Bolted · Body and bonnet: ASTM A105N · Ball and seat: Z13C13 · Gasket: Stainless steel and graphite · Nominal size range: NPS 1/4–2 · End connections: Threaded ASME B1.20.1 or socket-weld ASME B16.11Vertical ball-type check valve with a standard port and bolted bonnet. The body and bonnet components are ASTM A105N forged steel, while the ball and seat are Z13C13 stainless steel. An internal guide directs the ball along the valve axis. A stainless-steel/graphite gasket seals the joint. This configuration covers nominal sizes from one-quarter to two inches, with threaded or socket-weld ends.
Forged steel flanged check valvePipeline connection: Flanged · Flanged-series classes: Class 150 / 300 / 600 · Series nominal size range: DN 10–50 / NPS 3/8–2 · Operation: Automatic, flow-operated · Internal arrangement: Guided closure member · Cover construction: Bolted · Manual actuator: NoneForged-steel flanged check valve with a bolted cover. A guided internal closure opens with forward flow and returns to the seat for reverse-flow shut-off. The valve operates automatically and does not require a handwheel or manual command. This type belongs to the flanged series covering Class 150, 300 and 600 arrangements and nominal sizes DN10 to DN50. Size, class and face-to-face length are the principal interface parameters for matching it to the pipeline.
Swing check valveClosure type: Swing disc with hinge arm and pin · Body and cover options: ASTM A216 WCB / A352 LCB / A352 LC3 / A217 WC6 / A217 C5 / A351 CF8M · Trim options: 13% Cr, F304/F316, Stellite hard-facing · Cover gasket: Stainless steel and graphite · Operation: Automatic, flow-operated · Design standard: BS 1868 · Face-to-face standards: ASME B16.10 / API 6D · Flange standard: RF / ASME B16.5Swing check valve with a hinged disc, hinge arm and pin, removable cover and RF flanged ends. Forward flow opens the disc; the disc returns to its seat to close the reverse-flow path. Body and cover options include carbon steel, low-temperature steel, chromium-molybdenum alloys and CF8M stainless steel. Disc and seat trim includes 13% chromium and F304/F316 stainless-steel arrangements, with Stellite-hard-faced options. Stainless-steel/graphite cover-gasket arrangements are used, and operation is automatic.
Check valve with ring-joint flangesValve type: Check · Pipeline connection: Ring-joint flanges, RJ · Connection sealing: Ring seated in flange grooves · Flange standard: ASME B16.5 · Nominal size range: DN 50–600 · Operation: Automatic; no manual handwheelCheck valve with ring-joint flanges at both ends, for a pipeline interface using a flange sealing ring. The valve operates automatically with the flow, returning its internal closure to the seat to stop reverse flow. The flange arrangement is defined with ASME B16.5, and the dimensional series includes nominal sizes from DN50 to DN600. Ring configuration and flange class must match the grooves of the mating flanges.
Check valve with butt-welding endsValve type: Check · Pipeline connection: Butt-weld, BW · End preparation: Bevelled · End standard: ASME B16.9 · Nominal sizes: DN 50 / 80 / 100 / 150 / 200 / 250 · Operation: Automatic; no manual handwheelCheck valve with butt-weld connections and two bevelled ends. Its automatic closure permits forward flow and closes the reverse-flow path. Direct welded connections integrate the body into the pipeline. The end arrangement is specified with ASME B16.9, with DN50, DN80, DN100, DN150, DN200 and DN250 sizes included in the arrangement. Pipe-end diameter and wall thickness must be specified for each size.
Horizontal ball check, standard portClosure: Ball · Installation: Horizontal · Flow port: standard port · Bonnet: Bolted · Body and cover: ASTM A105N · Ball: ASTM A276 Grade420 · Cover gasket: Stainless steel / GraphiteThis horizontal check valve uses a ball to close the reverse-flow path. It has a bolted bonnet and standard port construction; its closure member is distinct from the piston-type check. Listed materials include A105N forged body and cover, an A276 Grade420 ball, and a stainless-steel/graphite cover gasket. Threaded and socket-weld end arrangements are described. Confirm the installation direction and pressure-temperature envelope for the selected type and line conditions.
Horizontal ball check, full portClosure: Ball · Installation: Horizontal · Flow port: full port · Bonnet: Bolted · Body and cover: ASTM A105N · Ball: ASTM A276 Grade420 · Cover gasket: Stainless steel / GraphiteThis horizontal check valve uses a ball to close the reverse-flow path. It has a bolted bonnet and full port construction; its closure member is distinct from the piston-type check. Listed materials include A105N forged body and cover, an A276 Grade420 ball, and a stainless-steel/graphite cover gasket. Threaded and socket-weld end arrangements are described. Confirm the installation direction and pressure-temperature envelope for the selected type and line conditions.