Relief Valve Nozzles - Pumps, Valves, Piping and Fittings
Relief valve nozzles are replaceable internal components that form the inlet and seating passage of pressure-relief valves installed in marine pumps, piping and machinery systems. They must match the valve manufacturer, size, pressure setting, temperature range and fluid service.
ProShipWorks provides end-to-end support to source and supply Relief Valve Nozzles for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.
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Product Information
| Product Name | Relief Valve Nozzles |
|---|---|
| Product Category | Pumps, Valves, Piping and Fittings |
| Product Reference | 681 |
| Brands / Manufacturers | Crosby, LESER, Kunkle |
| Unit of Measure | Piece |
Key Features
| Key Feature |
|---|
| 1. Precision-machined inlet and seating surface |
| 2. OEM-specific dimensional compatibility |
| 3. Available in corrosion-resistant metallic alloys |
| 4. Supports defined pressure-relief flow capacity |
| 5. Replaceable during valve overhaul |
Applications of Relief Valve Nozzles
| Application |
|---|
| 1. Marine boiler and steam systems |
| 2. Fuel oil, lubricating oil and hydraulic systems |
| 3. Seawater, cooling-water and cargo piping systems |
Technical Specifications
| Model | Specification | Value | Unit |
|---|---|---|---|
| OEM-specific relief valve nozzle | Material | Specified by valve manufacturer; commonly stainless steel or alloy steel | — |
| OEM-specific relief valve nozzle | Compatibility | Must match valve body, inlet size, pressure class and trim design | — |
| OEM-specific relief valve nozzle | Pressure rating | According to the complete relief valve rating | — |
| OEM-specific relief valve nozzle | Fluid service | Steam, gas, liquid, fuel oil, seawater or hydraulic fluid as specified | — |
Standards, Certifications & Class Approval
Review the available standards and approval information relevant to the product. Actual certification, material traceability, inspection and classification requirements depend on the product type, intended application and purchasing specification.
| Applicable Standards & Certification | Applicable requirements may include ASME BPVC Section VIII, ISO 4126 and API 527 for the complete pressure-relief valve. API 526 applies primarily to standardized flanged steel pressure-relief valves. The nozzle itself is normally supplied as an OEM replacement component. |
|---|---|
| Class Approval | Class approval is normally associated with the complete relief valve or protected marine system, not the nozzle alone. Acceptance may involve DNV, ABS, Lloyd's Register, Bureau Veritas or ClassNK, depending on vessel notation and application. |
Installation, Maintenance & Safety Information
| Installation Notes | Isolate, depressurize, drain and verify the system is safe before dismantling. Confirm the valve tag, nozzle designation, material and dimensions against OEM documentation. Clean mating surfaces, install with approved gaskets where applicable, and follow OEM torque and adjustment procedures. |
|---|---|
| Maintenance Tips | Inspect the nozzle seating surface for corrosion, erosion, pitting and wire-drawing during valve overhaul. Do not lap or machine beyond OEM limits. Replace damaged components and test the complete relief valve after reassembly at an approved facility. |
| Safety Notes | Never remove or replace a nozzle while the system is pressurized. Do not alter the nozzle bore, seat angle or material. The relief valve must be correctly set, sealed where required and function-tested before returning the equipment to service. |
Request a Quote for Relief Valve Nozzles
Contact ProShipWorks for marine or industrial product sourcing, quotations and delivery.
- Vessel name and IMO number
- ETA / vessel schedule
- Berth or vessel location
- Required quantity
- Preferred delivery window
- Shipping agent contact details
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