Yodify Product Library
Instantly add the LPRD Large Pressure Relief Device and 50,000+ more product series to your store or catalog  
Book Your Demo and See How
or create your store

LPRD Large Pressure Relief Device

Brand: Qualitrol Company

Mechanical 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

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

Instantly populate your store or catalog 
CREATE YOUR SITE
or book a demo with the Yodify Team
show more