Safety Burst Disc Replacement - Kidde Fire Systems ECS Manual

3.3

Safety Burst Disc Replacement

Whenever the valve is rebuilt, the Safety Disc Assembly must be replaced. Refer
to Figure 2 or Figure 3.
CAUTION
Before removing the valve, make sure that all pressure has been relieved from
the cylinder. To relieve any remaining pressure, restrain the cylinder and
WARNING
depress the pressure check in the Supervisory Pressure Switch.
Depending on the manufacture date of the valve, the safety disc is located either on the
cylinder shoulder, adjacent to the cylinder valve or on the cylinder valve itself. Valves
manufactured after April 2014 have the safety burst disc located on the cylinder shoulder.
Valves manufactured before May 2014 have the safety burst disc located on the valve body.
For the location of the date code, see Figure 2. Follow these steps to replace the safety burst
disc.
1. Remove the safety disc retainer, safety disc, and safety disc washer from the cylinder or
valve body. See Figure 2 and Figure 3. Discard the removed components.
Note: Do not remove the holder of the safety burst disc assembly from the cylinder shoulder.
2. Assemble the new safety disc retainer with a new safety disc and safety disc washer to the
cylinder or valve body. Torque to the appropriate value listed in Table 5.
Never install any type disc other than the one included with the rebuild kit.
Installing an incorrect disc could result in violent rupture of the cylinder and
serious injury.
Make sure that multiple safety discs are not stuck together. Installing more
than one safety disc could result in violent rupture of the cylinder and serious
WARNING
injury.
Never reinstall a used safety disc and/or washer. Once the retainer has been
removed or the valve has been rebuilt, the disc and washer must be replaced
with new components.
Figure 2. Installation of Safety Burst Disc on Cylinder (Valves Manufactured after April 2014)
06-237553-001
Date Code Location
Safety Disc Retainer
Safety Burst Disc
Safety Washer
Holder
5 August 2016