Relief valves, Maintenance/troubleshooting, Load valve – Badger Meter Portable Hydraulic Testers User Manual
Page 13: Flow, Burst discs and burst disc bodies, Load valve flow burst discs and burst disc bodies
Relief Valves
Often relief valves will start to open before they reach their full pressure flow settings . Compare the pressure and flow rate
readings made in Step 3 under
. Any great decrease in flow rate from those tests indicates a faulty
relief valve .
MAINTENANCE/TROUBLESHOOTING
The PFM testers are designed to give years of trouble-free service . However, if there is an issue, you can make a few
simple checks .
Load Valve
If the valve fails to load the system, remove the valve body and check for foreign material, worn parts or seals .
Flow
The absence of any flow reading may indicate a blockage of the turbine . Remove the retaining ring from the inlet port and
carefully remove the turbine assembly . Remove any material that may be preventing easy rotation of the rotor .
Reassemble and attempt a flow reading again . If the tester still fails to indicate flow, return the tester to the factory .
Burst Discs and Burst Disc Bodies
The burst discs are designed to rupture at a specified pressure . The PFM6 and PFM8 testers have a single burst disc that
bypasses flow around the loading valve when ruptured . The PFM6BD testers provide protection from excessive pressure in
either direction with two internal burst discs that, when ruptured, bypass flow around the loading valve . If a rupture occurs,
replace the burst discs .
IF YOU DO NOT HAVE THE PROPER TOOLS TO ACCOMPLISH THIS TASK, IT IS HIGHLY RECOMMENDED THAT YOU
RETURN THE TESTER(S) TO THE FACTORY FOR REPLACEMENT OF THE BURST DISC HOUSING AND THE BURST
DISCS. INJURY TO PERSONNEL AND/OR DAMAGE TO EQUIPMENT MAY RESULT IF THE BURST DISCS ARE INSTALLED
IMPROPERLY.
The following tools and parts are needed:
• 5/8" open end box wrench
• 0…80 (or greater) pound-inch torque wrench
Description
Part Number
Quantity
Burst discs
PFM6
F1614-7500
1
PFM6BD
F1614-7500
2
PFM8
F1614-7500
1
Optional
O-ring
F3137-015
1
Backup ring
F1015-015
1
Maintenance/troubleshooting
Page 13
August 2014
TUR-UM-00730-EN-02