Type 20 - T20 EXHR
The Bellofram Precision Controls Type 20 EXHR is a compact extra-high-relief pneumatic air relay for applications that require precise 1:1 signal control and very fast downstream blowdown. The two-stage, pilot-operated relay accepts a pneumatic signal and provides both positive and negative bias adjustment. It supports output pressure from 2 to 120 psig, forward flow up to 14 SCFM, and approximately 15 SCFM exhaust capacity at the stated test condition. The Type 20 EXHR is suited to air hoists, gate actuators, brakes, control valves, remote positioning devices, tensioning systems, web tracking, and other pneumatic equipment where rapid exhaust is critical.
Features:
- Extremely Accurate and Cost-Effective Relay
- Positive and Negative Bias Capability
- Small Size
- Rugged and Stable
- Basic Relay Available With Choice of Three Port Sizes
- High Release Versions Available
- Gate Actuators
- Air Hoists
- Disc & Shoe Brakes
- Remote Positioning Devices
- Valve Rotors
- Control Valves
- Tensioning Systems
- Web Tracking Systems
Maximum Supply Pressure
150 psig (10.3 BAR)
Pressure Ranges
2-120 psig
(0.1 – 8.3 BAR)
(0.1 – 8.3 BAR)
Port Sizes
1/8", 1/4", 3/8"
NPT, BSPP, BSPT
NPT, BSPP, BSPT
Sensitivity
1/8" H2O (3.2mm)
Forward Flow Capacity
14 SCFM (400 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
15 SCFM (425 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
2-120 psig
(0.1 – 8.3 BAR)
(0.1 – 8.3 BAR)
Temperature Range
-20 to 160˚F
(-29 to 71˚C)
(-29 to 71˚C)
Total Air Consumption @ Maximum Output
8 SCFH (4 LPM)
Materials of Construction
zinc alloy, stainless steel, brass, carbon steel, acetal, nitrile
Supply pressure sensitivity
0.005 psig (0.35 mBAR)
per 25 psig (1.7 BAR)
change in supply pressure
per 25 psig (1.7 BAR)
change in supply pressure
Maximum Signal
150 psig
(10.3 BAR)
(10.3 BAR)
Ratio of Accuracy for 12 psig span
<0.5%
Find Your Part Number
Not sure? Call for help. Phone: 304-387-1200
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