Large-bore cryogenic emergency release valve

Flanged / weld ends

A stainless steel emergency-disengagement valve series for large cryogenic transfer lines. The DN150-400 range uses PFA sealing and is illustrated as a bare-stem valve for a separately specified operating arrangement.

Size: DN 150-400
Body material: Stainless steel; exact grade to specify
Connections: Flanged / weld ends

Temperature: -196 to +80°C
Pressure: PN16 / PN20 (1.6 / 2.0 MPa nominal)
Medium: LNG / NG, LOX / O2, LN2 / N2, LAr / Ar

Configuration and operating limits are confirmed for your project.

Engineered for your application

Sizes and pressure ratings depend on construction, materials and configuration. Confirm the selected pressure-temperature rating with the quotation.

Applications

LNG Industrial Gases Marine & Offshore Cryogenic Storage & Transfer

Technical data

The specification, in detail.

ARD-TR-005 technical data
Parameter	Technical specification
Size range	DN 150-400
Pressure ratings	PN16 / PN20 (1.6 / 2.0 MPa nominal)
Temperature range	-196 to +80°C
Medium	LNG / NG, LOX / O2, LN2 / N2, LAr / Ar
End connections	Flanged / weld ends
Inspection references	GB/T 12237; GB/T 24925
Operating arrangement	Bare shaft shown; operating and release package to specify

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.

FlangedWeld ends - preparation to specify

Shown configuration: a large inline cylindrical body with annular flanged ends, an open bore and a bare extended shaft with an upper mounting flange

ARD-TR-005 end connection details
Connection detail	Connection / selection requirement
Connection options	Flanged / weld ends
Interface selection	Specify the end standard, nominal size, pipe dimensions and required mating interface.
Flange selection	Confirm pressure designation, facing, drilling and gasket; no flange standard is established by the photograph.
Weld alternative	Welded connections are listed as an alternative. Confirm BW/SW preparation and the selected outline drawing.

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.

ARD-TR-005 material schedule
Component	Material / option
Body, bonnet, stem and ball	Stainless steel; exact grade to specify
Seal	PFA

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.

Large-bore DN150-400 transfer-line configuration
Stainless steel wetted construction with PFA sealing
Extended shaft and upper mounting interface in the illustrated arrangement

ARD-TR-005 engineering requirements
Engineering data	Configuration requirement
Transfer-system definition	Specify medium, flow, line size, design conditions and the required emergency isolation or release sequence.
Actuation and mounting	Confirm actuator type, mounting, required torque and fail action. The illustrated valve has no actuator.

Sizes and pressure ratings depend on construction, materials and configuration. Confirm the selected pressure-temperature rating with the quotation.

The reference establishes a valve series, not a complete certified emergency-release system. Release logic, drive, isolation sequence and mating equipment must be specified for the selected assembly.

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-TR-005 · Revision 2026-10-29. Product illustrations show one configuration; the approved order documentation defines the supplied assembly.

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Dimensions

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 dimensions

Documentation

Product documents

Download the Arden data sheet for ARD-TR-005, or request the outline drawing for your selected configuration.

Product data sheet Request dimensional drawing

Product code ARD-TR-005 · Revision 2026-10-29. Illustrations show one configuration; approved order documentation defines the supplied assembly.

Large-bore cryogenic emergency release valve