Single Disc Wafer Check Valve, API 594, 2-48 IN, 150-1500 LB

Q: Which documentation is included in a standard EPC MDR package?

When specified: approved GA drawing, EN 10204 3.1 material certificates, hydrostatic/pneumatic test records to the applicable test standard, NDE reports required by the ITP, coating records if painted, and the ITP release note. CAD/STEP models and bilingual datasheets are issued after size, class and trim are frozen — they are not generic public downloads.

Q: Which design and test standards apply to the Single Disc Wafer Check Valve, API 594, 2-48 IN, 150-1500 LB?

Design reference: API 594, API 6D. Face-to-face: API 594. Pressure test / inspection: API 598. NACE, fire-safe or fugitive-emission clauses are quoted only when the purchase specification requires them.

Summary

Single Disc Wafer Check Valve, API 594, 2-48 IN, 150-1500 LB is designed for backflow prevention in process, power and pipeline systems. dual-plate wafer construction keeps face-to-face short where slam control matters; flanged ends support bolted pipeline integration and inspection access. Carbon-steel pressure parts suit general hydrocarbon and utility service when corrosion allowance and coating are defined on the data sheet. Typical duties include oil & gas, chemical processing, general industrial service. Confirm end connection, trim, actuation and inspection scope against the approved project data sheet.

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Features

Product features

Wafer Check Valve design
Bubble-tight soft-seat sealing

Advantages

Selection advantages

Select NPS and pressure class inside the published catalogue envelope; freeze the working size on the data sheet before GA release.
Design basis and face-to-face follow the standards shown in the technical grid; do not assume a single standard covers every option.
Construction (swing, dual-plate, axial, lift) is selected against slam and pressure drop, not a single listing for every line.

Plant application

Family plant duties. This SKU still uses the size, class, materials and tests listed on this page.

Pump-discharge backflow prevention

Function: Stops reverse flow on pump discharge. Closing characteristic must match the pump and system inertia.
Medium family: Water, hydrocarbons or process fluids on the datasheet.
Pressure & temperature: Family listing range is DN15–DN600. Do not treat DN1200 / 56 in as a check-valve default.
Applicable standards: API 594, BS 1868, ASME B16.34 and API 598 as applicable.
Send with RFQ: Size, class, swing/dual-plate/lift, installation orientation, flow and closing-speed concern.

Related application

Pipeline / compressor non-slam duty

Function: Non-slam or axial-flow designs where surge or slamming is a project concern.
Medium family: Gas or liquid pipelines listed on the datasheet.
Pressure & temperature: Closing speed, cracking pressure and orientation confirmed against the project, not a catalogue claim.
Applicable standards: API 6D / API 594 / ASME B16.34 when the selected design is specified to those standards.
Send with RFQ: Flow, density, reverse-flow risk, preferred non-slam type, class, ends and test scope.

Related application

Cooling-water and utility check

Function: Simple backflow prevention on plant utilities.
Medium family: Cooling water, firewater or utilities — coating/lining only when specified.
Pressure & temperature: Pressure class typically 150–600 on listed check SKUs; confirm the selected model.
Applicable standards: API 594 / BS 1868 / API 598 as applicable to the SKU.
Send with RFQ: DN, class, type, ends, orientation and hydrostatic test requirement.

Related application

Engineering hub

Technical data

Design & test

Design	API 594, API 6D
Face-to-face	API 594
Testing	API 598
Testing	API 598 / ISO 5208 to the class stated on the ITP
Connection	RF, BW, SW or threaded options

Parts and materials

Material	WCB, LCC, CF8M, CF3M
Connection	RF, BW, SW or threaded options

Wafer Check Valve design
Bubble-tight soft-seat sealing

Product FAQ

Engineering answers

How should check-valve construction be selected against slam and pressure drop?

Swing and tilting-disc checks suit moderate velocity with gravity closure. Dual-plate and axial/non-slam checks are used where reverse-flow slam is a concern. Lift and disc checks cover smaller sizes. The listing size is the catalogue envelope; confirm orientation, cracking pressure and face-to-face with the line list.

What size and pressure range is the Single Disc Wafer Check Valve, API 594, 2-48 IN, 150-1500 LB supplied in?

The catalogue series is DN15-DN300 (1/2"-12"), Class 150-1500 / PN16-PN250. A single NPS/class line in the notes is a typical working-size snapshot for drawing discussion, not the series limit. Confirm NPS, class, bore and trim against the approved data sheet.

Which documentation is included in a standard EPC MDR package?

When specified: approved GA drawing, EN 10204 3.1 material certificates, hydrostatic/pneumatic test records to the applicable test standard, NDE reports required by the ITP, coating records if painted, and the ITP release note. CAD/STEP models and bilingual datasheets are issued after size, class and trim are frozen — they are not generic public downloads.

Which design and test standards apply to the Single Disc Wafer Check Valve, API 594, 2-48 IN, 150-1500 LB?

Design reference: API 594, API 6D. Face-to-face: API 594. Pressure test / inspection: API 598. NACE, fire-safe or fugitive-emission clauses are quoted only when the purchase specification requires them.

Project engineering

Need a custom bore, CRA overlay, or actuator sizing?

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Check Valves

Single Disc Wafer Check Valve, API 594, 2-48 IN, 150-1500 LB

Product features