* Set prssure up to 6000 psig (414 bar)
* Working temperature: -40～148°C (-40～300°F)
* End connection size: 1/8″ to 1″, 6mm to 12mm
* Stainless steel 316, 316L, 304, 304L, 321, 904L material
* Multiple springs for a selection of set pressure ranges
* Label identifies the set pressure range
* AmsSystem standard cleaning
* Packaging: single bagged with inner box and outer carton
* Permanently Heat code marked; traceable to original mill certificate of test
* Critical surfaces are 100% visually inspected using magnification and lighting
* All valves 100% factory tested and come with high-quality appearance

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• Description

AmsSystem high pressure and low pressure proportional relief valves OPEN when system pressure reaches the set pressure and CLOSE when system pressure falls below the set pressure. Multiple springs for a selection of set pressure ranges. Back pressure is the pressure of the outlet of valves. It increases the set pressure of proportional relief valves. PRV1 and PRV3 series: Balanced stem design to eliminate the effect of system back pressure. PRV2 series: Pre-set pressure = Desired pressure – 0.8 × Back pressure. Lead seal lock wire through lock wire holes to lock proportional relief valve so as to secure a set pressure effectively. Relief valves are proportional relief valves that open gradually as the pressure increases. Consequently, they do not have a capacity rating at a given pressure rise (accumulation), and they are not certified to ASME or any other codes. Variety of end connection types available: female/male NPT, BSPT, BSPP, female/male metric thread, fractional/metric double ferrule tube fitting compression fitting.

PRV1 Series – High Pressure Valves

* Set pressure from 50 to 6000 psig (3.4 to 414 bar)

* Maximum outlet pressure 1500 psig (103 bar)

* Working temperature -40°C to 148°C (-40°F to 300°F)

* End connections: 1/8″ to 1″, 6 mm to 12 mm

* End types: tube fitting, male/female NPT, BSPT, BSPP, metric thread

* Orifice size 0.14″ (3.6 mm)

* Liquid or gas service

* 7 color-coded springs available for a wide range of set pressures

* Adjustable bonnet cap and adjustable set pressure

* Variety of valve body and seal materials, Manual override handles available

PRV2 Series – Low Pressure Valves

* Set pressure from 10 to 225 psig (0.68 to 15.5 bar)

* Maximum outlet pressure 225 psig (15.5 bar)

* Working temperature -40°C to 148°C (-40°F to 300°F)

* End connections: 1/8″ to 1″, 6 mm to 12 mm

* End types: tube fitting, male/female NPT, BSPT, BSPP, metric thread

* Orifice size 0.19″ (4.8 mm), 0.25″ (6.4 mm)

* Liquid or gas service, One spring for the full set pressure range

* Lead seal lock wire through lock wire holes to lock proportional relief valve so as to secure a set pressure effectively

* Adjustable bonnet cap and adjustable set pressure

* Variety of valve body and seal materials

PRV3 Series – High Pressure Valves

* Set pressure from 50 to 1500 psig (3.4 to 103 bar)

* Maximum outlet pressure 1500 psig (103 bar)

* Working temperature -40°C to 148°C (-40°F to 300°F)

* End connections: 1/8″ to 1″, 6 mm to 12 mm

* End types: tube fitting, male/female NPT, BSPT, BSPP, metric thread

* Orifice size 0.25″ (6.4 mm)

* Liquid or gas service

* 3 color-coded springs available for a wide range of set pressures

* Balanced stem design to eliminate the effect of system back pressure

* Variety of valve body and seal materials, Label identifies the set pressure range