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LPRD Large Pressure Relief Device
Brand: Qualitrol CompanyMechanical device for relief of excessive pressure buildup in large volumes of gas or fluid.
Patented dual gasket system provides quick response time and automatically reseals after pressure has subsided.
Options include local operation indication, contacts (switches) for operation alarming, and directional shield for hot oil and gas exhaust control.
Features- World’s leading pressure relief device pioneered automatically resealing pressure relief
- Greater than 50 years and 400,000 units of field experience in pressure relief have enabled Qualitrol experts to refine designs for maximum reliability
- Most frequently customer specified pressure relief by name
- Robust design and materials provide reliable protection and long life
- Dual gasket design provides amplified force for rapid operation
- Patented secondary seal wiper gasket provides more reliable resealing
- Stainless steel operating valve, fasteners, and hardware
- Flange and ring are made from aluminum with a chromate conversion coating with exposed aluminum components receiving an additional epoxy paint coat
- Switches can be specified to operate as latching or momentary, SPDT or DPDT, high DC, or low current gold contact type, and with connector, terminal box, or flying lead style connections
- Device can be top mounted horizontally (recommended) or side mounted vertically for maximum installation flexibility
- 100% tested for quality assurance
- Test results are serialized for traceability
- Visual and remote indication of operation
- Standard units support up to two alarms switches that can be mounted directly to the device or on the directional shield
Specifications
Brand
Ambient Operating Temperature
- -40° to 80° C (-40° to 176° F)
Bushing Material
- Stainless Steel
Cover Material
- 300 Series Stainless Steel
- Cold Rolled Steel
- Zinc-Plated with Chromate & Thermosetting Powder Coat
Dielectric Strength
- 2,500 Vac, 50/60 Hz for One Minute
Electrical Connectors
- ANSI Style Circular 3-Pin
- Flying Leads or Terminal Box
- Military Spec MS3102E16-10P Circular 3-Pin
- PG-13.5 Cable Entry, Max.
- QUALITROL Style Circular 3-Pin
External Hardware Material
- Stainless Steel
Flange Material
- Die Cast Aluminum
- Polyester Resin Impregnated, Chromate Conversion Coating & ASA 70 Light Gray Thermosetting Powder Coat Finish
Gasket Material
- Nitrile
- Silicone
- Viton
Indicator Pin Material
- Brass
Indicator Retaining Sleeve Material
- High Temperature Thermoplastic Rubber
- UV Stabilized Nylon
Oil Operating Temperature
- -20° to 100° C (-40° to 212° F)
Operating Temperature
- -25° to 85° C (-13° to 185° F)
Ring Material
- Aluminum with Chromate Conversion Coating
Salt Spray Testing
- 1,000 Hours of Salt Spray Testing with No Appreciable Loss of Strength
- 200 Hours of Salt Spray Testing Per ASTM B: 117 with No Visual Signs of Corrosion
Sealing Valve Material
- 304 Stainless Steel, Sealing Areas Lubricated with Silicone-based Lubricant
Semaphore Material
- Impact Resistant Plastic with Stainless Steel Hardware is Standard
Spring Material
- ASTM A229 Oil-Tempered Spring Wire with Zinc Plate & Chromate
Spring Seat Material
- Aluminum
Stud Material
- 300 Series Stainless Steel
- 416 Stainless Steel
Switch Rating
- 1/2 A at 125 Vdc, Non-Inductive
- 1/4 A at 250 Vdc, Non-Inductive
Valve Stem Material
- Carbon Steel with Zinc Plate & Chromate