Thermal cycling
Expansion changes alignment, seating load and packing stress.
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Critical Service / High Temperature & High Pressure
High-Temperature & High-Pressure Valves Built Around the Full Duty
For main steam, boiler, feedwater and high-pressure process lines requiring stable sealing under extreme duty.
Portfolio contextUp to Class 4500*
Temperature contextUp to 680°C*
Typical solutionPressure-seal gate / globe / check
Engineering focus
Design out the dominant failure risks
Verify pressure and temperature together with thermal cycling, differential pressure, trim, packing, torque and the complete test scope.
High differential pressure
Velocity and wire-drawing can erode seats and increase load.
Pressure-boundary fatigue
Body, bonnet and bolting must support design and upset cases.
Valve selection
Match the architecture to the duty
Starting points for engineering review. Final selection depends on the completed process data and project specification.
Pressure-Seal Gate Valve
Best fit: Full-open isolation in steam and feedwater lines.
Engineering focus: Bonnet seal, wedge guidance and hardfacing.
Pressure-Seal Globe Valve
Best fit: Shut-off or controlled throttling.
Engineering focus: Plug profile, flow direction and stem thrust.
Pressure-Seal Check Valve
Best fit: Backflow prevention in high-pressure piping.
Engineering focus: Disc stability, closing behavior and pressure loss.
Buyer essentials
Six inputs for a comparable quotation
Send the same completed datasheet to every supplier and require a clear deviations list.
Design/operating pressure and temperature plus upset cases.
Maximum operating and shut-off Δp and flow rate.
Isolation, throttling or check; position and cycles.
Body, trim, seat, packing, bolting and hardfacing.
Manual or actuator; fail action and closing time.
NDE, tests, MTC, PMI, ITP and witness points.
Service-specific RFQ data
Heat-up rateHot torque marginWarm-up bypassStem orientation
Standards & verification
Specify measurable acceptance
Confirm edition, test medium, pressure, duration, leakage acceptance, material traceability and witness points in the purchase order.
ASME B16.34API 598ISO 15848-1ASME B16.10
Buyer FAQ
Is pressure class alone enough?
No. Confirm the material rating at the actual design temperature.
When is pressure-seal construction considered?
Commonly for high-pressure, high-temperature service after engineering review.
What should be witnessed?
Define pressure, leakage, NDE, material and functional checks in the ITP.
Send your RFQ for an engineering review
Share the completed datasheet, quantity, destination and delivery target for a practical recommendation and factory quotation.
*Portfolio limits depend on valve type, size, material, pressure-temperature rating and completed engineering review.
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