13
External-Style Pressure Relief Valve A-1402C Series
3 VALVE DISASSEMBLY
3.1 PROCEDURE
3.1.5
Loosen the set screw (Item 15 of Figure 1-3) thus securing the cap (Item 14).
3.1.6
Use a pipe wrench and unscrew the cap as shown in Figure 3-1. Remove the cap.
3.1.7
Remove the top gasket or bumper (Item 9 of Figure 1-3).
3.1.1
Remove the protective cap (blue) and cut the seal wire (Item 18 of Figure 1-3) to release the cap chain. Unscrew and
remove the flue (tube) from around the valve.
3.1.2
If present, remove the plastic protector from the base or tongue of the valve.
3.1.3
If present, remove the flue O-ring (See Item 22 of Figure 1-3).
3.1.4
Remove the rupture disc flange bolts (Item 25 of Figure 1-3) from the valve base. Separate the disc flange from the
valve base and remove the rupture disc (Item 23) inner and outer O-rings (Items 30 and 31 respectively;
see Figure 1-3).
Figure 3-1 Valve Cap Removal
Figure 3-2 Flue and Protective Cap
CAUTION:
Spring-loaded Assembly. During valve-spring disassembly, the valve contains springs under load.
DO
NOT
attempt to disassemble the valve without first reading these instructions or injury may result.
Spring pressure must be adjusted to minimum and a bench clamp or press used for disassembly.
CAUTION: Flange Damage.
To prevent flange handle damage during dissambly, handle the valve body and
rupture disc flange carefully after disassembly. Avoid allowing their machined surfaces to contact the metal
workbench and hand tools or damage may result.
CAUTION
CAUTION
