Aside from some NPT fittings located in the utility manifold, all fittings used in a
Compac CNG Dispenser are SAE. Some SAE fittings are adjustable to allow for
rotational positioning of components such as solenoids. Nipples, tees, and elbows
are used, but the procedure is the same for each.
Fitting replacement and servicing:
When replacing, disassembling or tightening fittings:
1. De-gas the dispenser
2. Switch off the power supply to the dispenser.
DANGER: Never remove any electrical components without first switching off the
power to the dispenser. Failure to turn off the power could result in an electric shock.
3. Make sure that your work area (including the vice, workbench, tool storage
area, and floor) are totally clean of particles or previous work. Cleanliness
and correct assembly practice can avoid most seal problems.
4. Make sure that the gas inlet pipes are properly supported before connection.
5. Refer to one of the following procedures, depending on the fitting that you
are using:
▪ Connect Threaded SAE Fittings
▪ Connect Adjustable threaded SAE Fittings
▪ Connect Compression Fittings
1. Inspect the components ensuring that the threads and sealing faces are
clean and undamaged.
2. Lubricate the O-ring with a light oil.
3. Screw the components together by hand until the O-ring touches the face of
the port.
4. Tighten the fitting firmly with a suitable spanner.
CAUTION: Never use thread tape on SAE parallel fittings.
1. Inspect the components ensuring that the threads and sealing faces are
clean and undamaged.
2. Lubricate the O-ring with a light oil.
3. Back off the lock nut fully so that the O-ring and washer are on the plain
shank of the fitting.
4. Screw the components together by hand until the O-rings touch the faces of
the ports.
5. Position the components to the desired alignment.
6. Hold the fitting in position and firmly tighten the lock nut.
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