Relief duty & set pressure
State the required set pressure, relieving conditions and capacity. Include inlet and outlet connections, backpressure and the medium for sizing.
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| Available Sizes | DN15-DN25 |
|---|---|
| Connection Type | BSP · NPT |
| Size | DN15 · DN20 · DN25 |
| Body Material | CF8 |
| Seat Material | HPb59-1 |
| Disc Material | HPb59-1 |
| Media | LNG. LO2. LN2. LAr, CO2 |
| Thread Type | Female |
Catalogue options. Operating limits depend on the selected size, materials and configuration.
Cryogenic safety valve with a CF8 body and female BSP or NPT connections for pressure-relief duties. Provide the set pressure, relieving capacity, medium, temperature and outlet backpressure for sizing.
Applications: Cryogenic applications
For technical documentation or assistance with your selection, contact Nordic Valves.
Cryogenic safety valve with a CF8 body and female BSP or NPT connections for pressure-relief duties. Provide the set pressure, relieving capacity, medium, temperature and outlet backpressure for sizing.
| Specification | Catalogue data |
|---|---|
| Size range | DN15-DN25 |
| Connection | Female threaded, BSP / NPT |
| Pressure / setting | Specify rating and required set pressure |
| Operation | Spring-loaded pressure relief |
| Source temperature* | -196°C to +80°C |
| Catalogue media | LNG, LOX, LN2, LAr, CO2 |
Catalogue options. Nominal ratings are not the allowable pressure at every temperature; confirm the selected configuration. *Documented family temperature range; confirm pressure-temperature limits and the selected trim.
| Component | Catalogue material |
|---|---|
| Body | CF8 |
| Seat | HPb59-1 |
| Disc | HPb59-1 |
Materials shown are the published catalogue construction. Confirm seat, seals and any service-specific trim with the quotation.
| DN | H | H1 | M1 | M2 | L | Operating pressure (MPa) | Set pressure (MPa) |
|---|---|---|---|---|---|---|---|
| 15 | 150 | 56 | G3/4 | M30x1.5 | 35 | 4.0 | 0.4 - 1.0 |
| 15 | 150 | 56 | G3/4 | M30x1.5 | 35 | 4.0 | 1.0 - 2.0 |
| 15 | 150 | 56 | G3/4 | M30x1.5 | 35 | 4.0 | 2.0 - 3.0 |
| 25 | 197 | 69 | G1 1/4 | M36x2 | 47 | 4.0 | 0.4 - 1.0 |
| 25 | 197 | 69 | G1 1/4 | M36x2 | 47 | 4.0 | 1.0 - 2.0 |
| 25 | 197 | 69 | G1 1/4 | M36x2 | 47 | 4.0 | 2.0 - 3.0 |
Linear and diameter dimensions are in mm; weights are in kg. Pressure bands are in MPa (1 MPa = 10 bar). Height and length datums follow the drawing. Thread designations and ISO mounting codes are not linear dimensions. Supplied female-threaded relief arrangement, DN15 and DN25. M1/M2 are the exact source connection designations, including metric threads; do not substitute BSP/NPT. DN20 is not tabulated. Set-pressure bands do not establish relief capacity. Use the approved order drawing for installation and fabrication.
| Component | Source arrangement material |
|---|---|
| Cover | HPb59-1 |
| Spring Seat | S30408 |
| Adjusting Ring | HPb59-1 |
| Adjusting Screw | HPb59-1 |
| Ejector Bar | 20Cr13 |
| Body | S30408 |
| Lock Nut | S30408 |
| Spring | S30210 |
| Sealing | T2 |
| Sealing | PTFE |
| Disc | S32168 |
| Valve Seat | S32168 |
| Bonnet | S30408 |
Materials apply to the supplied reference arrangement. Supplied female-threaded relief arrangement, DN15 and DN25. M1/M2 are the exact source connection designations, including metric threads; do not substitute BSP/NPT. DN20 is not tabulated. Set-pressure bands do not establish relief capacity.
| Engineering data | Configuration requirements |
|---|---|
| Dimension data | Reference table and drawing: DN15, DN25. Dimensions and connection reference. |
| Installation drawing | Confirm BSP or NPT, male/female ends, thread sizes, engagement, end-to-end length and installation clearance. |
| Pressure-temperature rating | Confirm allowable inlet pressure at the relieving temperature for the selected body, trim and seals. Specify set pressure, back pressure and certified relief capacity separately. |
Nominal pressure class, temperature range and relief set pressure are separate specifications. Confirm the allowable pressure at the design temperature for the selected construction.
Supplied female-threaded relief arrangement, DN15 and DN25. M1/M2 are the exact source connection designations, including metric threads; do not substitute BSP/NPT. DN20 is not tabulated. Set-pressure bands do not establish relief capacity.
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Explore application guidanceState the required set pressure, relieving conditions and capacity. Include inlet and outlet connections, backpressure and the medium for sizing.
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Listed body options: CF8. seat or seal options: HPb59-1. Match the selected combination to the medium and operating temperature.
Include the operating conditions in your enquiry. Add your medium, pressure, temperature and documentation requirements alongside the selected options.
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