Badger Meter Portable Hydraulic Testers - Manual (Page 14)

Burst Disc Procedure for PFM6 and PFM8 Testers
1 . Position the tester block to expose the internal burst disc body as shown in
Figure 10.
2 . Loosen the burst disc body from the flow meter block .
3 . Remove the burst disc body from the flow meter block .
4 . Remove the ruptured burst disc from the flow meter block and discard .
5 . Clean out the burst disc port . Remove any debris from the sealing surfaces .
6 . Rotate the tester to face the burst disc port upwards and drop in a new burst disc . Make sure it lies flat on the sealing
surface entrance . Lubricate the O-ring on the burst disc housing and insert it back into the block . Tighten the burst disc
housing down to form the disc against the sealing surface .
7 . Using a torque wrench, tighten the burst disc body in the block to 35 foot-pounds (50 .8 Nm) .
DO NOT OVER TORQUE THE BURST DISC HOUSING. APPLYING TOO MUCH TORQUE WILL DAMAGE THE BURST DISC
AND CAUSE THE DISC TO RUPTURE PREMATURELY.
Burst Disc Body (1)
Burst Disc (1)
Figure 9: PFM6 and PFM8 burst disc
Burst Disc Procedure for PFM6BD
1 . Position the PFM6BD to expose the internal burst disc body as shown in
Figure 11 .
2 . Loosen the burst disc body from the flow meter block .
3 . Remove the burst disc body from the flow meter block .
4 . Remove the ruptured burst discs from the flow meter block and discard . Retain the support ring .
5 . Clean out the burst disc port and the support ring . Remove any debris from the sealing surfaces .
6 . Rotate the tester to face the burst disc port upwards and drop in a new burst disc . Make sure it lies flat on the sealing
surface entrance . Drop in the support ring and follow it with the second burst disc . Lubricate the O-ring on the burst
disc housing and insert it back into the block . Tighten the burst disc housing down to form the disc against the
sealing surfaces .
7 . Using a torque wrench, tighten the burst disc body in the block to 60 foot-pounds (81 .4 Nm) .
DO NOT OVER TORQUE THE BURST DISC HOUSING. APPLYING TOO MUCH TORQUE WILL DAMAGE THE BURST DISC
AND CAUSE THE DISC TO RUPTURE PREMATURELY.
Maintenance/troubleshooting
Page 14 August 2014 TUR-UM-00730-EN-02