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T75 Air Relays
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).
Applications:
- Volume Boosting
- Valve Motor Loading
- Low temperature applications
Features:
- Simplified maintenance
- Relay can be serviced without removal from the line
- Signal to output pressure ratios of 1:1, 1:2, 1:4 and 1:6
- Maximum output is 150 PSIG (10.3 BAR)
- Temperature Range -40°F to +200°F
Specifications
Model
P75
Port Size
Type 75: 1/4", 3/8" NPT, BSPP, BSPT ; Type 75H: 1/4", 3/8", 1/2" NPT, BSPP, BSPT
Sensitivity
1/4" H2O (6.4mm)
Application(s)
Industrial
Pilot Operated
No
Air Consumption
<12 SCFH (5.7 LPM)
Flow Rate (scfm)
40 SCFM (1150 LPM) @ 20 PSIG (1.4 BAR) signal and 100 PSIG (6.9 BAR) supply
Connection
NPT
Product Description
T75 Air Relays
Accuracy (% of span, typ.)
< 2% (1:1)
Maximum Supply Pressure (psi)
250 PSIG (17.2 BAR)
Exhaust Capacity (scfm) @ 5 psid
Type 75 6 SCFM (170 LPM) @ 10 PSIG (0.69 BAR) above a 20 PSIG (1.4 BAR) setpoint Type 75H 15 SCFM (425 LPM) @ 10 PSIG (0.69 BAR) above a 20 PSIG (1.4 BAR) setpoint
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