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ES1600 REV A.
BFMMRP4ALBF
TEST NO. 3
PURPOSE: IS THE STATIC PRESSURE DROP ACROSS CHECK VALVE NO. 1 MAINTAINED AT LEAST 3 PSI ABOVE THE RELIEF VALVE OPENING
POINT?
NO BYPASS HOSE USED IN TESTS 1 AND 2
1. Close the high and bypass valves. Close TC #4 and disconnect gauge bypass hose.
2. Open the low and bypass valves allowing the pointer to reach the upper end of the scale. Close the low and bypass valves.
3. Allow the gauge reading to stabilize. Record this reading as the static pressure drop across check valve No. 1.
BYPASS HOSE USED IN TESTS 1 AND 2
1. Open the low and bypass valves allowing the pointer to reach the upper end of the scale. Close the low and bypass valves.
2. Allow the gauge reading to stabilize. Record this reading as the static pressure drop across check valve No. 1.
TESTING PROCEDURE FOR SINGLE CHECK ON RPDA TYPE 2 BYPASS:
Note: The first check of the mainline valve is also the first check of the bypass assembly and the test results for the first mainline check
should be recorded as the first check of the bypass assembly. If the local water authority requires a second test for the first check,
perform the test again and record the results. The second check is the single check on the bypass line. (See page 14 for test cock
locations.)
1. Flush water through the bypass line test cocks to eliminate foreign material.
2. To test the bypass single check, connect the “high” side hose to the first test cock on the bypass line (upstream of single check valve). Hold the
“low” side hose level with the gauge.
3. Close the inlet shut-off valve on the mainline and bypass line. The single check valve must hold at least 1.0 psid.
WRAP UP:
CLOSE ALL TEST COCKS. OPEN NO. 2 SHUT-OFF VALVE. DRAIN GAUGE.
V.
TESTING PROCEDURES
FIGURE 11
