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904L Swing Check Valve Class 300

904L Swing Check Valve Class 300 combines Swing Check Valve, 904L, Class 300, Flanged / Wafer and Metal / Soft Seat in one defined purchasing configuration. Use it when those core parameters are already fixed by the valve list or piping specification.

API 594 / ASME B16.34Design basis
Class 300Pressure class
904LPressure-boundary material
Technical Configuration

904L Swing Check Valve Class 300

DesignSwing Check Valve
StandardAPI 594 / ASME B16.34
Pressure ClassClass 300
Body Material904L
End ConnectionFlanged / Wafer
Seat / SealMetal / Soft Seat
Service / Application
OperationSelf-Acting
Request Technical QuoteTechnical Documents
Buyer Decision Summary

Why This Exact Configuration Exists

The commercial scope for 904L Swing Check Valve Class 300 is controlled by the interaction of body construction, material, pressure class, piping interface, sealing and operation—not by the valve name alone.

Selection reason

Choose 904L Swing Check Valve Class 300 when the RFQ specifically calls for Swing Check Valve, 904L, Class 300 and Flanged / Wafer. Swing-disc construction provides reverse-flow protection with closing response influenced by disc travel, hinge geometry and system velocity.

What changes technically

For 904L Swing Check Valve Class 300, the combined technical effect is high-alloy austenitic stainless steel for selected corrosive chemical environments; medium pressure service with heavier flanges, bolting and wall sections than Class 150; and wafer versus flanged body selection changes bolting, face-to-face and installation requirements. Metal seating shifts the design toward hardfacing/coating, lapping, higher torque and wear control rather than polymer-seat compliance.

What to confirm before quote

Before pricing 904L Swing Check Valve Class 300, confirm nominal size and bore, design pressure/temperature, trim and stem/shaft material, the Metal / Soft Seat sealing requirement, Self-Acting operating basis, leakage/test acceptance and the final drawing/document package.

Compared with a nearby configuration

Compared with 904L Swing Check Valve Class 150, this configuration changes pressure class (Class 300 instead of Class 150). That difference is what a buyer should verify before treating the two pages as commercially interchangeable.

Design Basis

In 904L Swing Check Valve Class 300, the Swing Check Valve construction determines the closure support, body arrangement and maintenance approach. Confirm bore or flow path, body joint, stem/shaft retention, seat support, anti-blowout features where applicable and access requirements against the approved GA.

Pressure-Boundary Material

For 904L Swing Check Valve Class 300, the pressure boundary is 904L. High-alloy austenitic stainless steel for selected corrosive chemical environments. Because this valve is Class 300 with Flanged / Wafer, verify the material condition, trim compatibility, bolting and any PMI/NDE or corrosion-control requirement as one package.

Pressure Class and Piping Interface

For 904L Swing Check Valve Class 300, the specified rating is Class 300 and the piping interface is Flanged / Wafer. Medium pressure service with heavier flanges, bolting and wall sections than class 150. Wafer versus flanged body selection changes bolting, face-to-face and installation requirements. Final dimensions and pressure-temperature suitability must therefore be checked against the selected material and design temperature, not inferred from class alone.

Seat and Seal Arrangement

For 904L Swing Check Valve Class 300, the listed sealing basis is Metal / Soft Seat. Metal seating shifts the design toward hardfacing/coating, lapping, higher torque and wear control rather than polymer-seat compliance. Confirm leakage acceptance, pressure/temperature limits and cycling together with the Class 300 loading and the selected Self-Acting operating method.

Operation and Actuation

For 904L Swing Check Valve Class 300, operation is Self-Acting. Self-acting operation depends on process differential pressure and closure dynamics rather than an external operator. The final operator or actuator basis should use the actual size, maximum differential pressure, Metal / Soft Seat friction/seating behavior and required operating or emergency time.

Service Conditions

No service qualifier is fixed by the product name, so 904L Swing Check Valve Class 300 should be released only after the actual fluid, temperature range, pressure cases, cycling and special service requirements are known.

Inspection and Testing

For 904L Swing Check Valve Class 300, tie MTC/heat traceability, dimensional inspection, PMI/NDE where specified, shell/seat testing, coating checks, witness points and final records to the approved API 594 / ASME B16.34 datasheet and ITP.

Documents Before Release

The manufacturing release for 904L Swing Check Valve Class 300 should reference the approved GA, material/trim schedule, seat/seal definition, operator or actuator data, test scope and required final documentation.

Relevant Product Ranges

904L ValvesProduct range→Swing Check ValvesProduct range→904L Check ValvesProduct range→NACE Sour Service Check ValvesProduct range→Class 300 Check ValvesProduct range→
904L Swing Check Valve Class 150API 594 / ASME B16.34 · Class 150→904L Swing Check Valve Class 600API 594 / ASME B16.34 · Class 600→254 SMO Swing Check Valve Class 300API 594 / ASME B16.34 · Class 300→Alloy 20 Swing Check Valve Class 300API 594 / ASME B16.34 · Class 300→C95800 Swing Check Valve Class 300API 594 / ASME B16.34 · Class 300→Hastelloy C276 Swing Check Valve Class 300API 594 / ASME B16.34 · Class 300→Inconel 625 Swing Check Valve Class 300API 594 / ASME B16.34 · Class 300→Monel 400 Swing Check Valve Class 300API 594 / ASME B16.34 · Class 300→

Ready to Review 904L Swing Check Valve Class 300?

Send the project specification for 904L Swing Check Valve Class 300; the quotation can then confirm size-dependent dimensions, trim, sealing, operation, inspection and final documents without changing the defined 904L / Class 300 basis.

Request Technical Quote