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Safety and relief valves · Pilot-operated Pressure Relief Valve

Pilot-operated Pressure Relief Valve

Pilot-operated pressure relief valve subject to certified sizing.

← Back to product center Submit technical RFQ

Referenced standards and project specificationsAPI 520 · API 526Relieving medium and phaseRelieving medium and gas, liquid or two-phase conditionSet conditionsSet pressure, allowable overpressure and relieving temperature

Information required for selection

Engineering selection criteria

Options are not freely interchangeable and require technical confirmation.

Product type: Pilot-operated Pressure Relief Valve
Referenced standards and project specifications: API 520API 526API 527Applicable pressure code
Relieving medium and phase: Relieving medium and gas, liquid or two-phase condition
Set conditions: Set pressure, allowable overpressure and relieving temperature
Back-pressure conditions: Normal, maximum and variable back pressure
Relieving duty: Required relieving capacity and governing contingency
Piping and code basis: Inlet and outlet piping, environment and applicable pressure code

API · ISO · IEC · ASTM · MSS

Verified industry sources

References use official standards and industry-organization sources only. They do not imply certification.

Verified industry sources

API 520 addresses sizing, selection and installation of pressure-relieving devices.
API 526 and API 527 address flanged steel pressure-relief valves and seat-tightness testing respectively.
A pilot-operated design is sensitive to back pressure, pilot lines, media cleanliness and ambient temperature.

Information required for selection

Relieving medium and phase: Relieving medium and gas, liquid or two-phase condition
Set conditions: Set pressure, allowable overpressure and relieving temperature
Back-pressure conditions: Normal, maximum and variable back pressure
Relieving duty: Required relieving capacity and governing contingency
Piping and code basis: Inlet and outlet piping, environment and applicable pressure code

APIAPI standards plan — 520, 526 and 527 APIAPI pressure-relieving systems committee

Inspection, documents and operating limits

Include these requirements in the RFQ and purchase order so suppliers quote and deliver on the same basis.

Inspection and testing

Verify shell test, set pressure and reseating performance
Confirm seat leakage to the applicable standard
Check nameplate, seal, spring range and required approvals

Delivery documents

Relieving-capacity calculation and selection datasheet
Set-pressure, cold differential test pressure, test and calibration reports
Capacity certification and material records required by the applicable code

Selection limits

Pressure-relief valves are safety-critical and cannot be selected by nominal size alone
Back pressure, two-phase flow, fire cases and inlet or outlet pressure drop must enter the calculation
Do not claim API, ASME or local-code approval without the applicable certificate

PRICING & RFQ

Price on request

Prices shown are reference prices for selected specifications only and do not constitute a final quotation. Actual pricing varies with technical requirements, inspection and documentation, packaging, order quantity, Incoterms and destination logistics. For other sizes or parameters, submit an RFQ and we will provide formal selection and quotation support for your service conditions and purchasing requirements.

Price on requestGet formal quote →

Submit technical RFQ

Provide the medium, phase, design temperature and pressure, size, materials, end connections, actuation, quantity, destination, delivery schedule and required inspection documents.Catalog entries describe configurable sourcing scopes and technical confirmation requirements. They do not represent stock, certification, verified manufacturing capacity or unrestricted combinations of parameters. Final specifications remain subject to approved datasheets, drawings, supplier documents and quotation.

VALVE.MEVALVE.ME

Safety and relief valves · Pilot-operated Pressure Relief Valve

Pilot-operated Pressure Relief Valve

Pilot-operated pressure relief valve subject to certified sizing.

← Back to product center Submit technical RFQ

Information required for selection

Engineering selection criteria

Options are not freely interchangeable and require technical confirmation.

Product type: Pilot-operated Pressure Relief Valve
Referenced standards and project specifications: API 520API 526API 527Applicable pressure code
Relieving medium and phase: Relieving medium and gas, liquid or two-phase condition
Set conditions: Set pressure, allowable overpressure and relieving temperature
Back-pressure conditions: Normal, maximum and variable back pressure
Relieving duty: Required relieving capacity and governing contingency
Piping and code basis: Inlet and outlet piping, environment and applicable pressure code

API · ISO · IEC · ASTM · MSS

Verified industry sources

References use official standards and industry-organization sources only. They do not imply certification.

Verified industry sources

API 520 addresses sizing, selection and installation of pressure-relieving devices.
API 526 and API 527 address flanged steel pressure-relief valves and seat-tightness testing respectively.
A pilot-operated design is sensitive to back pressure, pilot lines, media cleanliness and ambient temperature.

Information required for selection

Relieving medium and phase: Relieving medium and gas, liquid or two-phase condition
Set conditions: Set pressure, allowable overpressure and relieving temperature
Back-pressure conditions: Normal, maximum and variable back pressure
Relieving duty: Required relieving capacity and governing contingency
Piping and code basis: Inlet and outlet piping, environment and applicable pressure code

APIAPI standards plan — 520, 526 and 527 APIAPI pressure-relieving systems committee

Inspection, documents and operating limits

Include these requirements in the RFQ and purchase order so suppliers quote and deliver on the same basis.

Inspection and testing

Verify shell test, set pressure and reseating performance
Confirm seat leakage to the applicable standard
Check nameplate, seal, spring range and required approvals

Delivery documents

Relieving-capacity calculation and selection datasheet
Set-pressure, cold differential test pressure, test and calibration reports
Capacity certification and material records required by the applicable code

Selection limits

Pressure-relief valves are safety-critical and cannot be selected by nominal size alone
Back pressure, two-phase flow, fire cases and inlet or outlet pressure drop must enter the calculation
Do not claim API, ASME or local-code approval without the applicable certificate

PRICING & RFQ

Price on request

Price on requestGet formal quote →

Submit technical RFQ