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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