Type 79 - T79 High Flow Relay
The Type 79 1:1 Ratio High Flow Precision Air
Relay brings additional precision and control to
the Bellofram line of precision control products.
The Type 79 relay is designed for applications
where a precise control of flow is needed.
This regulator offers low droop, high accuracy
and fine adjustment sensitivity. The use of a
Bellofram rolling diaphragm provides greater
sensitivity and improved accuracy. The balanced pintle minimizes output
pressure changes caused by
fluctuations in supply pressure.
Careful design and quality
materials throughout assure
long, trouble-free operation.
The rugged die-cast zinc
and aluminum housings are
pressure tested to assure safe operation. The Type 79 is designed to withstand harsh and abusive environments. This is
attributed to a chemical conversion coating of
all cast components, and a vinyl paint finish.
The Type 79 can achieve flow rates of well over
200 SCFM (5695 LPM). This relay can be pipe
or bracket mounted.
A version of the Type 79 for valve control
applications is available. The Type 79V 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.
Features:
- Balanced Pintle
- High Flow Capacity
- Field Serviceable
- Large Port Sizes Available
- Air Piloted or Dome Loaded
- 200 PSIG Output
- 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
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
Find Your Part Number
Not sure? Call for help. Phone: 304-387-1200
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