Dngp Leak Test Procedure - GE Becker 3.5M Series Instruction Manual

Table 13 - DNGP Spare Parts List
High Pressure 5/3 Solenoid Valve - Complete Assembly
High Pressure 5/3 Solenoid Valve Body
High Pressure 5/3 Solenoid Coil - 24 VDC
High Pressure 5/3 Solenoid Coil - 12 VDC
Low Pressure 2/2 Solenoid Valve - 24 VDC (less than 40 psig)
High Pressure 3/2 Solenoid Valve - 24 VDC (40 to 150 psig)
3 Amp Replacement Fuse (Input Power)
DNGP Control Board (includes display board and terminals)

DNGP Leak Test Procedure

1. Switch DNGP to standby from auto. Observe feedback mA indicator. If position of the valve changes follow
continue to step #2.
2. Move MCV to manual to close block valve or close cylinder block valves.
3. Check cylinder for decaying or equalizing pressure.
a) If cylinder pressure is decaying, check and repair leaks at fittings.
b) If cylinder pressure is equalizing, rebuild cylinder.
4. Check for external leak at gasket, NPT instrumentation ports.
a) If leak is found, tighten bolts or fittings.
b) If no leak is found, rebuild solenoid valve with O-ring kit by replacing lower valve body. See spare parts list
Table 12 for part numbers.
Condition Response/Action
20-4500
20-4506
20-4509
20-4518
20-4202
20-4221
31-9002
31-0016
37