Compact designed one piece body to reduce space Low friction bonnets to increase both accuracy and to improve consistency of cracking and reseal pressure Lock wire to secure a given pressure setting Identifying color coded springs and labels indicate spring cracking pressure Selective and replaceable springs with narrow pressure ranges RA3 series – One spring for all set pressure range RA6 series – 7 Replaceable springs for a variable pressure range
|10||Lower Spring Support||316SS|
|12||Upper Spring Support||316SS|
UNILOK relief valves are free from machine oils, loose particles and grease throughout the close cleaning process.
Every relief valve is 100% factory tested with nitrogen for cracking and reseal performance.
Proper installation, materials compatibility, operation and maintenance of these valves are the responsibility of the user. The total system design must be taken into consideration to ensure optimal performance and safety.
UNILOK relief valves that were not actuated for some time may contain pressure higher than the set pressure.
Cracking pressure is not affected by the outlet pressure.
UNILOK VR series relief valves are ordered by part number as shown below.
Example : The following part number, VR3MU-08N08T-SS is designated for VR3 series low pressure relief valve with 1/2″ male NPT x 1/2″ UNILOK tube fitting, 316SS.
|R3||Low Pressure, 300psig|
|R6||High Pressure, 6000psig|
|U||UNILOK Tube Fitting|
|F||Female NPT or ISO7/1[PT]|
|M||Male NPT or ISO7/1[PT]|
|Fractional[Inch] Tube O.D. Designation|
|Metric Tube O.D. Designation|
|Pipe Size Designation [NPT or ISO7/1-PT]|
Options are only for VR6 series. VR3 series
spring is yellow color and cracking pressure
range with 10~250psig.