Enviro-Seal Bellows Seal And Bonnet; Replacing A Plain Or Extension Bonnet With An Enviro-Seal Bellows Seal (Stem/Bellows Assembly) And Bonnet - Fisher EAS easy-e Instruction Manual

ES Valve
July 2017
up. The level D3 cage/baffle assembly, however, must be installed with the hole pattern end next to the seat ring. If
a cage retainer (key 31) is to be used, place it on top of the cage.
4. Slide the valve plug (key 2) and stem assembly, or valve plug and ENVIRO‐SEAL bellows seal assembly, into the cage.
5. Place the gaskets (key 10, or keys 11, 12 and 14, if used) and the shim (key 27 or key 51) on top of the cage or cage
retainer. If there is a cage adaptor (key 4) or a bonnet spacer (key 32), set it on the cage or cage retainer gaskets and
place another flat sheet gasket (key 10) on top of the adaptor or spacer. If there is only a cage retainer, place
another flat sheet gasket on the retainer.
6. With an NPS 8 ES valve, install the load ring (key 26).
CAUTION
To avoid damaging packing with the valve stem threads, use care when installing the bonnet if the packing was not
removed from the bonnet.
Table 7. Recommended Torque for ENVIRO‐SEAL Bellows Seal Packing Flange Nuts
VALVE SIZE VALVE STEM DIAMETER THROUGH PACKING
NPS
1/2 ‐ 2
3 ‐ 4
7. Mount the bonnet on the valve and complete assembly according to steps 10 through 14 of the Replacing Packing
procedure, omitting steps 11 and 12 if new packing is not being installed, and being sure to observe the note prior
to step 11.
ENVIRO‐SEAL Bellows Seal and Bonnet
Replacing a Plain or Extension Bonnet with an ENVIRO‐SEAL Bellows Seal (Stem/Bellows
Assembly) and Bonnet
1. Remove the actuator and bonnet according to steps 1 through 6 of the Replacing Packing procedure of the
Maintenance section.
2. With care, remove the valve plug and stem assembly from the valve body. If necessary, lift out the cage, also.
CAUTION
To prevent possible product damage, cover the opening in the valve in the following procedure to protect the sealing
surfaces and to prevent foreign material from getting into the valve body cavity.
3. Remove and discard the existing bonnet gasket. Cover the valve body opening to protect sealing surfaces and to
prevent foreign material from entering the valve body cavity.
Note
The ENVIRO‐SEAL stem/bellows assembly for easy‐e valves is available only with a threaded and drilled plug/adaptor/stem
connection. The existing valve plug can be reused with the new stem/bellows assembly or a new plug can be installed.
14
Inch
1/2
1
MINIMUM TORQUE
NSm LbfSin
3 24
7 60
Instruction Manual
D100397X012
MAXIMUM TORQUE
NSm LbfSin
5 48
10 84