Type 20 - T20 Precision Relay
The Bellofram Precision Controls Type 20 is a compact two-stage, pilot-operated 1:1 precision air relay for pneumatic signal reproduction and pressure control. It accepts an input pressure signal and allows positive or negative bias adjustment to establish the required output pressure. The standard Type 20 provides output pressure from 2 to 120 psig, forward flow up to 14 SCFM, and approximately 2 SCFM exhaust capacity at the stated test condition. Its compact design is used in gate actuators, air hoists, brakes, remote positioning devices, valve rotors, control valves, tensioning systems, and web-tracking equipment.
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)
Bleed Rate
No Bleed
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
2 SCFM (55 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
| Part Number | Description |
|---|
