High Pressure 5/3 Solenoid Valve Conversion And Replacement - GE Becker 3.5M Series Instruction Manual

Table 10 - High Pressure 5/3 Solenoid Specifi cations
For Internal Pilot Operation: 160 psi line
pressure max., 50 psi line pressure min
Pressure Ratings* For External Pilot Operation: 160 psi line
pressure max., for pilot 50 psi line pres-
sure min. - 250 psi max.
Weight 2.5 lbs (1.1 kg)
Air, vacuum, and gases compatible with
Fluid Media
aluminum and Buna-N or Viton rubber
Coil Voltage & Frequency 24 VDC, 12 VDC
Inrush Current 0.58 amps
Holding Current 0.58 amps
Power Consumption 11 Watts
1/2"-14 NPT Electrical Conduit Connec-
tions (2) For wiring convenience conduit
Conduit Connections boss able to rotate 240°, and 24" wire
leads my be pulled from the conduit to
the nearest box
NOTE: Solenoid valves may be used on vacuum or pressures below or above the
stated limits, up to 250 psi, however, the pilot pressure range MUST be
50 psi - 160 psi.
External/Internal Pilot Conversion & Valve
Maintenance Instructions
Pilot Conversion:
For line pressure more than 160 psi, the solenoid valve
must be re-assembled to accept and external source of
air pressure within this range for shifting the spool. This
will allow the main ports to work at any pressure from
vacuum to 250 psi.
1. Remove 4 screws holding the solenoid structure to
the main valve body and remove the entire solenoid
assembly (leave the gasket as is).
2. Rotate the solenoid assembly 180°, and then
remount to the body.
3. Take careful note of the 1/8" NPT external pilot
port that was either on the top or side of the solenoid
structure. It should now be nearest to 3-porthole side
of the main body.
4. Connect a source of external pilot pressure to the
1/8" NPT port, 50 psi –160 psi, to the pilot port
Gas Line Filter:
For the longest life and best results, use an air line fi lter
installed no further than 10 feet from the valve. The fi lter
should be rated at 25 μm or fi ner.
Valve Seals:
Some oils may swell the rubber seals in valves and
cylinders, and may cause binding. To determine if the
seals are swelled in AAA valves:
1. Remove one O-ring from the body and slip it over
the spool.
2. Measure the clearance between the O-ring and spool.
If the clearance between the O-ring and spool is 0.005
in. or more all around, the ring is swelled from its original
shape (the paper these instructions are printed on is ap-
proximately 0.005 in. thick and can be used as a gauge.
A small amount of swelling will not usually impair valve
performance, and sometimes the valve will perform
reliably with as much as 1/32 in. clearance all around.
O-rings:
WARNING
Use Factory Designed O-Rings ONLY
The 5/3 solenoid valve uses 6, 3/4" I.D. x 15/16" O.D.,
Buna-N A O-rings. To replace these O-rings:
1. Remove the old O-rings using a sharp tool such as a
pick or scribe.
2. Use an air hose (and solvent if necessary), to
thoroughly clean out the grooves in the body.
3. Use a pair of tweezers* with and angle point, starting
ring in groove in one side and working around.
4. Lightly grease the spool and body bore before
assembly, using only valve grease, Moly Disulphide, or
O-ring grease.
NOTE: If tweezers are not available, slip the spool into the bore, as a guide, to just
below a groove, and work the ring into the groove with a small rod.
Remove these
4 screws
Figure 36 - High Pressure 5/3 Solenoid Valve
25