P79 High Flow Air Relays

The P79 1:1 Ratio High Flow Precision Air Relay brings additional precision and control to the BelGAS line of precision control products. The P79 relay is designed for applications where a precise control of pressure is needed. This regulator offers low droop, high accuracy and fine adjustment sensitivity. The use of a rolling diaphragm provides greater sensitivity and improved accuracy. The balanced pintle minimizes output pressure changes caused by fluctuations in supply pressure. A version of the P79 for valve control applications is available. The P79 utilizes soft exhaust seats to minimize air consumption, increased deadband to ignore valve oscillations, and an integral bypass valve that can be 'tuned' for optimum valve response.

P79
P79
Applications:
  • Volume Boosting
  • Valve Motor Loading
  • Low temperature applications
Features:
  • Soft exhaust seat to minimize air consumption
  • Increased deadband to ignore valve oscillations
  • Integral bypass valve can be 'tuned' for optimum valve response
  • Temperature Range -40°F to +200°F
Specifications
Model
P79
Weight
4.5 lbs. (2 kg)
Options
Epoxy Finish, Mounting Bracket
Port Size
3/8", 1/2", 3/4", 1" NPT, BSPP, BSPT
Sensitivity
P79 (Metal Seat) 1" H2O (25mm) Type Standard P79 (W/Bypass Valve) Dead Band <0.4 PSIG
Application(s)
Industrial
Pilot Operated
No
Air Consumption
P79 (Metal Seat) <12 SCFH (5.7 LPM) Type Standard P79 (W/Bypass Valve) <1 SCFH (5.7 LPM)
Flow Rate (scfm)
>125 SCFM (3500 LPM) @ 20 PSIG (1.4 BAR) signal and 100 PSIG (6.9 BAR) supply
Connection
NPT
Product Description
P79 High Flow Air Relays
Accuracy (% of span, typ.)
<1.5%
Maximum Supply Pressure (psi)
400 PSIG (27.6 BAR)
Exhaust Capacity (scfm) @ 5 psid
31 SCFM (875 LPM) @ 5 PSIG (0.35 BAR) above a 20 PSIG (1.4 BAR) setpoint
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