Page 34 - Alkon - Directional Control Air Valves & Accessories

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O M N I S E R I ES V A L V ES

OMNI 250 SERIES VALVES

AIR PILOT OPERATED

The OMNI Series 3-Way and 4-Way valves can be air pilot operated with three types of assemblies:

1. DOUBLE AIR PILOT (NO VALVE SPOOL SPRING). The valve spool is shifted by a momentary air pilot signal to
either of the “A” or “B” Pilots. 3-Way/Air Pilot

2. SINGLE AIR PILOT, SPRING RETURN. The valve spool is maintained in the normal rest position in the “B” end. A
maintained air pressure signal at the “A” end greater than the spring force will shift the valve spool.
3. DOUBLE AIR PILOT, SPRING OFFSET. The valve spool is maintained in the normal rest position in the “B” end. A
maintained air pressure signal at the “A” end greater than the spring force will shift the valve spool, providing
no air pressure signal is on the “B” end. By controlling the pressure differential between “A” and “B” a variety of
applications are available.
4-Way/Air Pilot
BASIC VALVE MODEL NUMBERS
DESCRIPTION SCHEMATICS
PIPE SIZE NUMBER

1/8 NPTF 250-02-011-03
Air Pilot
Spring Return
1/4 NPTF 250-02-001-03

1/8 NPTF 250-03-011-03
Double
Air Pilot
1/4 NPTF 250-03-001-03
1/8 NPTF 250-04-011-03
Double Air Pilot
Spring Offset
1/4 NPTF 250-04-001-03

Double Air Pilot

Note: For 3-Way body see page 35

03 Air Pilot

250-1402-1/4”
Note: Bases ordered separately

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