P63 Relief Valve/ Back Pressure Regulator

The P63 is a pilot operated relief valve/backpressure regulator. The main valve is capable of delivering large flow capacities while the pilot control maintains accurate set points. The P63 is used to maintain upstream pressure below a desired set point. When the upstream pressure rises above the set point, the main valve strokes allowing the unit to flow and decreases the upstream pressure below the set point. Once the pressure falls below the set point, the main valve shuts and prevents flow through the unit and remains shut as long as upstream pressure is below the unit's set point.

P63 P63 with Actuator
P63
P63 with Actuator
Applications:
  • Commercial and Industrial
  • City/District Gate Relief/Bypass
  • Plant Air Systems
Features:
  • Stable Startup
  • Easy In-Line Maintenance
  • Quick Change Trim Package
Specifications
Model
P63
Port Size
2" NPT or Flange, 3" Flange, 4" Flange
Body Sizes
2", 4"
Spring Range
Main Spring: 10 - 40 PSIG, 40 - 125 PSIG, 85 - 400 PSIG
Body Material
Plug 316 Stainless Steel, Body and Body Flange WCB Steel, Cage Stainless Steel (Standard Linear)
Application(s)
Pressure Protection, Commercial, Industrial
Pilot Operated
Yes
Connection
NPT, Flanged
Flange Type
150 RF Flanged, 300 RF Flanged
Product Description
P63 Relief Valve/ Back Pressure Regulator
Temperature Range(s)
-20° to 180°F (-29° to 82°C)
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