Type 79 V - T79 V High Flow Relay - High Flow Precision Air Relay
The Bellofram Precision Controls Type 79V is a high-flow precision air relay designed specifically for pneumatic valve-control applications. This 1:1 relay uses soft exhaust seats to reduce air consumption, increased deadband to help ignore valve oscillation, and an integral adjustable bypass valve that can be tuned for valve response. The balanced-pintle design and Bellofram rolling diaphragm support stable output as supply pressure and flow demand change. With large port options, output pressure capability up to 200 psig, and high pneumatic flow, the Type 79V is suited to control valves, valve actuators, volume boosting, gas-flow control, and other high-demand pneumatic systems.
Features:
- Balanced Pintle
- High Flow Capacity
- Field Serviceable
- Large Port Sizes Available
- Air Piloted or Dome Loaded
- 200 PSIG Output
- Optional High Relieving (Type 79HR) and Valve Control (Type 79V)
- Gas Flow Control
- Tensioning Control
- Volume Boosting
- Dancer Roll Loading
- Calendar Roll Loading
- Cylinder Bucking Control
- Valve Motor Loading
Maximum Supply Pressure
400 psig (27.6 BAR)
Pressure Ranges
0-200 psig
(0-13.8 BAR)
(0-13.8 BAR)
Port Sizes
3/8", 1/2", 3/4", 1"
NPT, BSPP, BSPT
NPT, BSPP, BSPT
Sensitivity
1" H2O (25mm)
Forward Flow Capacity
>125 SCFM (3500 LPM)
@ 20 psig (1.4 BAR)
signal and 100 psig
(6.9 BAR) supply
@ 20 psig (1.4 BAR)
signal and 100 psig
(6.9 BAR) supply
Exhaust Capacity @ 5 psig (0.4 BAR) above setpoint
31 SCFM (875 LPM)
@ 5 psig (0.35 BAR)
above a 20 psig
(1.4 BAR) setpoint
@ 5 psig (0.35 BAR)
above a 20 psig
(1.4 BAR) setpoint
Output Pressure Ranges
0-200 psig
(0-13.8 BAR)
(0-13.8 BAR)
Temperature Range
-40 to 200˚F
(-40 to 93˚C)
(-40 to 93˚C)
Total Air Consumption @ Maximum Output
<12 SCFH (5.7 LPM)
Materials of Construction
aluminum, brass, carbon steel, stainless steel, acetal, nitrile
Supply pressure sensitivity
<0.35 psig (0.02 BAR)
per 100 psig (3.5 BAR)
change in supply pressure
per 100 psig (3.5 BAR)
change in supply pressure
Maximum Signal
200 psig
(13.8 BAR)
(13.8 BAR)
Ratio of Accuracy for 12 psig span
<1.5%
Filter Ratio
1:1
Filter Flow Capacity
101-200 SCFM
Find Your Part Number
Not sure? Call for help. Phone: 304-387-1200
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