Type 75 - T75 HR Precision Relay - Fixed Negative Bias Relay (4psi)
The Type 75 relay uses signal pressure to
accurately control output pressure over a wide
range of flow and supply pressure variation.
Under varying flow conditions output pressure is maintained by use of an aspirator tube,
which adjusts the air supply valve opening in
accordance with the flow velocity. A balanced
supply valve, utilizing a rolling diaphragm,
makes the relay virtually immune to changes
in supply pressure. Maintenance is simple due
to the unit construction, and the relay can be
serviced without removing it from the line.
Signal to output pressure ratios of 1:1, 1:2, 1:4
and 1:6 are available. Maximum output is 150
psig (10.3 BAR).
Features:
- Balanced Valve Design
- High Flow Capacity
- Field Serviceable
- Multiple Output Ratios
- Negative Biasing Option
- 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
- Cylinder Return Stroke Actuation (75HR)
- Air Hoists (75HR)
- Electronic Control Applications (Negative Biasing Version)
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
41 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
16 SCFM (425 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)
Ratio of Accuracy for 12 psig span
< 2% (1:1)
Find Your Part Number
Not sure? Call for help. Phone: 304-387-1200
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