Safety & protectionARD-SF-007
Flanged connectionCryogenic safety valve
Class 150 / PN40 flanges
A flanged cryogenic safety-valve range covering DN40–150. Class 150 and PN40 describe separate flange options; the required relief setting and capacity are specified independently.
- Size
- DN 40–150
- Body material
- CF8
- Connections
- Flanged · Class 150 / PN40
- Operation
- Spring-loaded pressure relief
- Pressure
- Relief setting to specify
- Temperature
- Confirm design temperature
Engineered for your application
A flanged cryogenic safety-valve range covering DN40–150. Class 150 and PN40 describe separate flange options; the required relief setting and capacity are specified independently.
Sizes and pressure ratings depend on construction, materials and configuration. Confirm the selected pressure-temperature rating with the quotation.
Technical data
The specification, in detail.
| Parameter | Technical specification |
|---|---|
| Size range | DN 40–150 |
| Pressure ratings | Relief setting to specify |
| Connection | Flanged CL150 / Flanged PN40 |
| Pressure / setting | Specify rating and required set pressure |
| Operation | Spring-loaded pressure relief |
| Temperature | Confirm limits for the selected construction |
| Medium | LNG, LOX, LN2, LAr, CO2 |
Nominal pressure and ASME class are different rating systems. Confirm the pressure–temperature rating for the selected material and design.
End connections
Define the interface.
Shown configuration: Vertical bottom inlet flange and horizontal side outlet flange, bolted cover and spring housing.
| Connection detail | Connection / selection requirement |
|---|---|
| Published connection | Flanged CL150 · Flanged PN40 |
| Flange interface | Confirm standard, pressure class, facing, drilling and mating dimensions. The image alone does not establish any of these. |
| Published flange options | Class 150 and PN40 are alternative flange ranges, not relief set pressures or equivalent designations. |
The illustration shows one configuration. Published connection alternatives are options for enquiry; their availability depends on size, rating, material and design. Installation dimensions come from the drawing, not the illustration.
Materials
From body to seal.
| Component | Material / option |
|---|---|
| Body | CF8 |
Published material alternatives are configuration-dependent. H.F. denotes hard facing; the exact grade and material certificates are confirmed with the offer.
Selection notes
Defined around your application.
- Catalogue body: CF8
- Published connections: Flanged CL150 · Flanged PN40
| Engineering data | Configuration requirement |
|---|---|
| Dimension data | Order-specific dimensions required; no matched dimension table is published for this configuration. |
| Installation drawing | Confirm end-to-end length, overall height, flange standard, facing, drilling and operating/removal 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. |
Sizes and pressure ratings depend on construction, materials and configuration. Confirm the selected pressure-temperature rating with the quotation.
the technical record categorises this range for cryogenic service but does not publish a numeric temperature limit for this construction. Confirm the minimum design temperature and trim before selection.
Specify required set pressure, relieving medium and temperature, back pressure and certified capacity. Spring-setting bands, nominal pressure and flange rating are separate values. No capacity or approval is inferred from the product illustration.
Published ratings do not establish suitability for every listed medium. Oxygen cleaning, material compatibility, trapped-liquid relief and project approvals are specified for the selected assembly. Liquid-hydrogen and helium service require a separate temperature and material review.
Arden product datasheet
Product code ARD-SF-007 · Revision 2026-10-28. Product illustrations show one configuration; the approved order documentation defines the supplied assembly.
Download PDFDimensions
Plan the connection.
Need installation dimensions?
No numeric dimension table is published for this reference. Request a configuration-specific outline drawing with your enquiry.
Request dimensionsDocumentation
Product documents
Download the Arden data sheet for ARD-SF-007, or request the outline drawing for your selected configuration.
Product code ARD-SF-007 · Revision 2026-10-28. Illustrations show one configuration; approved order documentation defines the supplied assembly.
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