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OPERATION TEST PROCEDURE: BULLETINS NS8300, NS8302
3-Way direct acting solenoid valves. 1. Check general construction and appearance of valve.
TEST MEDIUM: Air.
TEST VOLTAGE 1. All AC valves are to be tested using 102/60-test voltage. & CURRENT: 2. All DC valves are to be tested using .154 test current.
COIL TESTS: .250.
1. A.C. - Energize solenoid and check milliampere reading. Value should be
2. D.C. - Energize solenoid and check voltage reading. Value should be
3. Dielectric test - Test voltage to be twice the rated voltage plus 1000 volts AC for a period of one (1) minute. Any evidence of damage, arcing, breakdown or current leakage in excess of 0.5 milliampere (Test light sensitivity setting) is to be recorded.
Apply seam test solution to all joints and pressurize valve to 10 PSI both energized and de-energized. Any bubbling or foaming is to be noted and recorded. Repeat test at M.O.P.D.
To avoid seat leakage or noise caused by the possible presence of dirt or loose chips, blow air at maximum operating pressure thru the valve before proceeding with tests below.
SEAT LEAKAGE Check valve for seat leakage at maximum operating pressure. Allowable leakage: (HIGH PRESSURE)
During the operational tests, check valve for noise. Any chattering or rattling in excess of normal AC hum is to be recorded. Valve should be tested at test voltage first, but voltage may be increased to full line voltage if necessary to pass the Noise Test Only.
OPERATIONAL 1. Operate valve at least 10 times at maximum operating pressure. TESTS:
2. Operate valve from maximum operating pressure down to minimum operating pressure.
SEAT LEAKAGE (LOW PRESSURE)
Check seat leakage at 10 psi. Allowable leakage: