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The minimum cracking pressure is the lowest differential pressure that is allowable in your system.
Lohms represent resistance in a fluid system.
Lohm is a measure of resistance to flow. The higher the Lohm rate, the more restrictive the flow. The maximum Lohm rating of the part is your flow criteria for the part.
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375 Momentum PRI® Pressure Relief Valve
This miniature valve is ideally suited for hydraulic applications where a relief valve is needed to regulate the upstream pressure.
Key Product Facts
  • Safety Relief Valve
  • Diameter: 0.375 inches
  • Full Open Lohm Rate: 100 Lohms max
  • Nominal System Pressure: Up to 3000 psi
  • Cracking Pressure Range: 50 to 500 psi
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HI-Q Side Exit Pressure Relief Valve
This fast-acting safety relief valve is ideal for systems up to 5000 psi where a Line Replaceable Unit (LRU) is desirable.
Key Product Facts
  • High Flow Relief Valve
  • Diameter: 1 inch
  • Full Open Lohm Rate: 100 Lohms max.
  • Nominal System Pressure: Up to 5000 psi
  • Cracking Pressure Range: 1000 to 5400 psi
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375 HD PRI® High Stability Pressure Relief Valve
This direct-acting valve is designed to provide an extremely stable relief flow over various flow rates and pressure combinations.
Key Product Facts
  • Safety Relief Valve
  • Diameter: 0.375 inches
  • Full Open Lohm Rate: 400 Lohms max
  • Nominal System Pressure: Up to 5000 psi
  • Cracking Pressure Range: 3000 to 5400 psi
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500 Momentum PRI® Pressure Relief Valve
This miniature valve is ideally suited for hydraulic applications where a relief valve with higher flow is needed to regulate the upstream pressure.
Key Product Facts
  • Safety Relief Valve
  • Diameter: 0.500 inches
  • Full Open Lohm Rate: 50 Lohms max
  • Nominal System Pressure: Up to 3000 psi
  • Cracking Pressure Range: 50 to 500 psi
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187 PRI® Pressure Relief Valve
This miniature, fast-acting safety relief valve is ideal for low pressure applications.
Key Product Facts
  • Safety Relief Valve
  • Diameter: 0.187 inches
  • Full Open Lohm Rate: 400 Lohms max.
  • Nominal System Pressure: Up to 3000 psi
  • Cracking Pressure Range: 20 to 100 psi
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