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9500 Series

Brand: Mercer Valve
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The 9500 Series Safety Relief Valves are “State of the Art” in pilot operated pressure relief valves.  

Mercer offers both a snap and modulating pilot.  

Mercer pilot operated valves are constructed with the same care and precision as our other valve lines.  

The pilot operated valves continue using our patented “Auto Seat Technology”® in the main valve and pilot valves, making the pilot operated valves as reliable as Mercer’s spring operated valves.
Features
  • Designed with “Auto Seat Technology”®. 
  • Consistent Set Pressures allowing repeatable uses without repair or resetting. 
  • Open, Close, Seat and SealTM. 
  • Low rated and fully guided spring allows for more consistent set pressures. 
  • Built in accordance with the requirements of ASME Boiler and Pressure Vessel Code.  Sec. VIII Div 1. 
  • Non-rising stems allowing valves to be installed in small areas.
The 9500 Series Safety Relief Valves are “State of the Art” in pilot operated pressure relief valves.  

Mercer offers both a snap and modulating pilot.  

Mercer pilot operated valves are constructed with the same care and precision as our other valve lines.  

The pilot operated valves continue using our patented “Auto Seat Technology”® in the main valve and pilot valves, making the pilot operated valves as reliable as Mercer’s spring operated valves.
Features
  • Designed with “Auto Seat Technology”®. 
  • Consistent Set Pressures allowing repeatable uses without repair or resetting. 
  • Open, Close, Seat and SealTM. 
  • Low rated and fully guided spring allows for more consistent set pressures. 
  • Built in accordance with the requirements of ASME Boiler and Pressure Vessel Code.  Sec. VIII Div 1. 
  • Non-rising stems allowing valves to be installed in small areas.
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Specifications

Brand

Standard Inlet Sizes

  • 1”, 1 1/2”
  • 1-1/2”, 2”
  • 2”, 3”
  • 3”
  • 3”, 4”
  • 4”
  • 6”
  • 8”

Actual Orifice Diameter (inch)

  • 0.439”
  • 0.533”
  • 0.687”
  • 0.844”
  • 1.050”
  • 1.350”
  • 1.625”
  • 2.020”
  • 2.280”
  • 2.500”
  • 3.000”
  • 4.000”
  • 4.750”
  • 5.750”

Actual Orifice Area (in²)

  • 0.151 in²
  • 0.223 in²
  • 0.371in²
  • 0.559 in²
  • 0.866 in²
  • 1.431 in²
  • 2.074 in²
  • 3.205 in²
  • 4.083 in²
  • 4.909 in²
  • 7.069 in²
  • 12.566 in²
  • 17.721 in²
  • 25.967 in²

Pressure Ranges (psi)

  • 15 to 4500
  • 15 to 3000
  • 15 to 3750
  • 15 to 2220
  • 15 to 1480
  • 15 to 900
  • 15 to 1530

Standard Temp Range (°F)

  • -15 to 400

Flow Coefficient, Kd (Gas)

  • 0.870

Flow Coefficient, Kd (Liquid)

  • 0.731
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