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OMNI 250 SERIES VALVES<br />

Air Pilot Operated<br />

The OMNI Series 3-Way and 4-Way valves can be air pilot operated with three types<br />

of assembly.<br />

1. DOUBLE AIR PILOT (NO VALVE SPOOL SPRING) The valve spool is shifted by<br />

a momentary air pilot signal to either of the “A” or “B” Pilots.<br />

2. SINGLE AIR PILOT, SPRING RETURN The valve spool is maintained in the<br />

normal rest position in the “B” end. A maintained air pressure signal at the “A” end<br />

greater than the spring force will shift the valve spool.<br />

3. DOUBLE AIR PIOT, SPRING OFFSET The valve spool is maintained in the<br />

normal rest position in the “B” end. A maintained air pressure signal at the “A” end<br />

greater than the spring force will shift the valve spool, providing no air pressure<br />

signal is on the “B” end. By controlling the pressure differential between “A” and<br />

“B” a variety of applications are available.<br />

Air Pilot<br />

spring return<br />

Double air<br />

pilot<br />

Double air<br />

pilot spring<br />

offset<br />

Basic Valve Model Numbers<br />

Pipe Size Number Schematics<br />

1/8 NPTF 250-02-011-03<br />

1/4 NPTF 250-02-001-03<br />

1/8 NPTF 250-03-011-03<br />

1/4 NPTF 250-03-001-03<br />

1/8 NPTF 250-04-011-03<br />

1/4 NPTF 250-04-001-03<br />

Double<br />

Air Pilot<br />

Note: For 3-Way body see page 45<br />

03 Air Pilot<br />

Note: Bases ordered separately<br />

32

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