A dual pressure relief device system that provides a safe, efficient method of switching from an active PRV to a standby, maintaining system overpressure protection
Anderson Greenwood Safety Selector Valve
Specs
Sizes
NPS 1 to 10 / DN 25 to 250
ANSI Class and Code
CL 150 to 2500, ASME up to 2500
Temperature Range
-423°F to 800°F / -253°C to 427°C
Materials
Carbon Steel, Stainless steel, duplex, other alloys
Features
Provides high Cv values, resulting in less than 3% pressure drop to the active PRV inlet, reducing destructive valve chatter.
One minimally sized penetration into the vessel or pipe reduces costs.
Reduces field installation costs and space requirements through preassembled and compact design.
Provides process isolation of standby PRV.
Allows PRV maintenance without process shutdown.
Bleed valve under each PRV vents entrapped process effectively and safely prior to removal for maintenance.
Clear, positive indication of active PRV.
Foolproof provisions for dual padlocking in either PRV position.
Tested packing design and minimal leak points reduce fugitive emissions.
No seat lapping required for maintenance. Minimal spare parts reduce cost of ownership.
Simple operation with built-in seat equalization and no special tools minimizes total valve operating time.
Tandem system available for dual PRV's discharging to a closed header system.
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