Back To Top
Crosby JB and JPV­A Large Orifice Pressure Relief Valve
JB and JPV-A Large Orifice Pressure Relief Valve
A large orifice pressure relief valve engineered to provide high quality, dependable overpressure protection for air, gas, vapor and steam applications

Features

  • ASME/NB certified capacities for air, water and steam.
  • Full compliance with all major global pressure relief standards including ASME VIII, XIII, API 526/527, EN4126 and PED/CE.
  • Highly customizable to meet most applications.
  • Interchangeable parts to reduce maintenance costs.
  • Full nozzle configuration.
  • Simple and reliable design for easy maintenance.
  • Soft seat options for superior seat tightness.
  • Adjustable blowdown to reduce product loss.
  • Restricted Lift available.
  • Wired or Wireless Relief Monitoring available.
  • Crosby™ Balanced Diaphragm
      20% greater backpressure handling improves reliability during backpressure surges.
    • 15% improvement in Kb factor enables sizing of smaller and/or fewer valves.
    • 100x more resilient than metal bellows for high-frequency cycling, ensuring safety.
    • Easily convert existing Crosby J-Series with Balanced Diaphragm upgrade kits
    • Crosby™ Bellows Leak Detection available
        Instant notification of bellows rupture allows effective maintenance protocol.
      • Detection of small ruptures, from 0.0009in2 (D orifice).
      • Ensured balanced operation after bellows rupture enhances safety.
      • Leakage volumetric calculation in real-time for risk assessment and decision making.
      • Over 90% reduction of leakage through bonnet vent.
      • Easily enhance existing Crosby J-Series with Bellows Leak Detection upgrade kits.
      • ASME/NB certified capacities for air, water and steam.
      • Full compliance with all major global pressure relief standards including ASME VIII, XIII, API 526/527, EN4126 and PED/CE.
      • Highly customizable to meet most applications.
      • Interchangeable parts to reduce maintenance costs.
      • Full nozzle configuration.
      • Simple and reliable design for easy maintenance.
      • Soft seat options for superior seat tightness.
      • Adjustable blowdown to reduce product loss.
      • Restricted Lift available.
      • Wired or Wireless Relief Monitoring available.
      • Crosby™ Balanced Diaphragm
          20% greater backpressure handling improves reliability during backpressure surges.
        • 15% improvement in Kb factor enables sizing of smaller and/or fewer valves.
        • 100x more resilient than metal bellows for high-frequency cycling, ensuring safety.
        • Easily convert existing Crosby J-Series with Balanced Diaphragm upgrade kits
        • Crosby™ Bellows Leak Detection available
            Instant notification of bellows rupture allows effective maintenance protocol.
          • Detection of small ruptures, from 0.0009in2 (D orifice).
          • Ensured balanced operation after bellows rupture enhances safety.
          • Leakage volumetric calculation in real-time for risk assessment and decision making.
          • Over 90% reduction of leakage through bonnet vent.
          • Easily enhance existing Crosby J-Series with Bellows Leak Detection upgrade kits.