Type 72 - T72 Positive Bias Booster Relay
The Type 72 Relay features an adjustable bias
pressure which enables users to obtain an output
pressure which is the sum of a controlled input
signal pressure plus the bias. The relay offers
an exceptionally high flow capacity (up to 50
SCFM/1400 LPM) with minimal pressure droop.
Output pressure is accurately maintained under
varying flow conditions by means of an aspirator tube, which adjusts the air supply valve
opening in proportion to flow velocity. A balanced supply valve utilizing a rolling diaphragm
makes the relay virtually immune to changes
in supply pressure. Simple design makes maintenance easy, and the relay can be serviced
without removing it from the line. The standard
signal-to-output ratio is 1:1, but 1:2, 1:4 and
1:6 ratios are available on special request.
Features:
- Four Adjustable Positive Bias Ranges from 0-10 PSI (0-0.7 BAR) to 2-150 PSI (0.1-10.3 BAR)
- Quick Response to Minute Changes in Downstream Pressure
- Dampening Action of Aspirator Tube Maintains Stable Output Pressure
- Output Virtually Unaffected by Changes in Supply Pressure
- Honking and Buzzing Eliminated by Action of Integral Baffle and Aspirator Tube
- Can Be Disassembled and Serviced Without Removing from Line
- Gas Flow Control
- Tensioning Control
- Clutch and Brake Controls
- Volume Boosting
- Dancer Roll Loading
- Calendar Roll Loading
- Cylinder Bucking Control
- Valve Motor Loading
Maximum Supply Pressure
250 psig (17.2 BAR)
Pressure Ranges
0-150 psig
(0–10.3 BAR)
(0–10.3 BAR)
Port Sizes
1/4", 3/8", 1/2"
NPT, BSPP, BSPT
NPT, BSPP, BSPT
Sensitivity
1/4" H2O (6.4mm)
Forward Flow Capacity
40 SCFM (1150 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
6 SCFM (170 LPM)
@ 10 psig (0.69 BAR)
above a 20 psig
(1.4 BAR) setpoint
@ 10 psig (0.69 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
< 0.6 psig (0.01 BAR)
per 50 psig (1.4 BAR)
change in supply pressure
per 50 psig (1.4 BAR)
change in supply pressure
Maximum Signal
150 psig
(10.3 BAR)
(10.3 BAR)
Ratio of Accuracy for 12 psig span
< 2%
Find Your Part Number
Not sure? Call for help. Phone: 304-387-1200
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