Wilkerson R21-04-Q48 Regulator 

Flow Capacity*

1/4\"

117 SCFM (55 dm³/s)

3/8\"

180 SCFM (85 dm³/s)

1/2\"

195 SCFM (92 dm³/s)

3/4\"

220 SCFM (103 dm³/s)

Adjusting Range Pressure

0 to 40 PSIG (0 to 2.8 bar)
0 to 160 (0 to 11 bar)

Bleed Rate

0.05 SCFM (0.024 dm³/s)

Maximum Supply Pressure

300 PSIG (20.7 bar)

Operating Temperature

32° to 150°F (0° to 65.5°C)

Port Size

NPT / BSPP-G

1/4, 3/8, 1/2, 3/4

Gauge Port (2 ea.)

NPT / BSPT-Rc

1/4

Weight

2.3lb. (1.04 kg)

* Inlet pressure 100 PSIG (6.9 bar). Secondary pressure (1/4, 1/2, 3/4) 90 PSIG (6.2 bar); (3/8) 80 PSIG (5.5 bar).