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 (see page 40).
2. Switch off the power supply to the dispenser.
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 (see page 87).
Connect Adjustable threaded SAE Fittings (see page 87).
Connect Compression Fittings (see page 88).
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.
Never use thread tape on SAE parallel fittings.
Connecting Adjustable SAE 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.
Never use thread tape on SAE parallel fittings.
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