Instruction manual

Instruction Manual
D500248X012
A31D Valve
April 2014
6
Figure 2. Available Seal Configurations
NOTE:
FOR OPTIMUM SEAL PERFORMANCE, THE PREFERRED VALVE ORIENTATION AT SHUTOFF IS WITH THE RETAINING RING DOWNSTREAM FROM THE HIGH PRESSURE SIDE OF THE VALVE.
1
PHOENIX III
FIRE-TESTED SEAL
NOVEX SEAL
SOFT SEAL WITH
BACKUP O-RING
BACKUP
RING
BACKUP
RING
SEAL RING
RETAINING
RING
RETAINING
RING
RETAINING
RING
HIGH PRESSURE
AT SHUTOFF
HIGH PRESSURE
AT SHUTOFF
HIGH PRESSURE
AT SHUTOFF
METAL
SEAL
RING
RESILIENT INSERT
NOVEX
SEAL RING
VALVE DISK
VALVE DISK
VALVE DISK
BODY
BODY
BODY
1
1
1
Table 3. Valve Orientation forOptimalSealPerformance
SEAL TYPE SHUTOFF DIRECTION INSTALLED ORIENTATION
Standard soft seal Bidirectional Preferred
Novex seal Unidirectional Preferred only
Phoenix III seal
Bidirectional
Non Fire-Tested
Preferred
Unidirectional Fire-Tested Preferred
Recommended or ”preferred” installation for the A31D valve is with the flow into the shaft side of the disk (retaining ring downstream from the high pressure side of the valve).