Instruction Manual
D103553X012
Large ET and ED Valves
July 2017
13
For ET/EWT Valves Equipped with HTS1 Seals
1. Carefully pry the plug retaining ring (key 27) from its groove in the valve plug (key 2A). Then remove the plug seal
ring (key 28), backup ring (key 29), and anti-extrusion ring (key 63). Inspect the retaining ring and backup ring for
damage and replace as needed. Discard the old plug seal ring and anti-extrusion ring.
2. Inspect the valve plug (key 2A) and stem (key 2B) for nicks, scratches, or other damage that would prevent proper
operation of the valve. If replacement of either is necessary, replace as a complete valve plug and stem assembly
(key 2).
3. Install the replacement plug seal ring (key 28) and anti-extrusion ring (key 63) with the open side of the seal ring
facing the top or bottom of the valve plug, depending on flow direction. The open side of the seal ring should face
up (toward the actuator) in flow-up installations and down in flow-down installations. Make sure the anti-extrusion
ring is adjacent to the closed side of the seal ring. Then install the plug backup ring (key 29) and retaining ring
(key 27).
To install the parts on the valve plug, first lubricate each with a general purpose silicone-base lubricant. Then gently
slide each over the top edge of the valve plug.
For ET-C/EWT-C Valves
1. Carefully pry the plug retaining ring (key 27) from its groove in the valve plug (key 2A). Then remove the plug seal
ring (key 28) and backup ring (key 29). Inspect the retaining ring and backup ring for damage and replace as
needed. Discard the old plug seal ring.
2. Inspect the valve plug (key 2A) and stem (key 2B) for nicks, scratches, or other damage that would prevent proper
operation of the valve. If replacement of either is necessary, replace as a complete valve plug and stem assembly
(key 2).
3. Install the replacement plug seal ring (key 28) with the open side of the seal ring facing the top or bottom of the
valve plug, depending on flow direction. The open side of the seal ring should face up (toward the actuator) in
flow-up installations and down in flow-down installations. Then install the plug backup ring (key 29) and retaining
ring (key 27).
To install the parts on the valve plug, first lubricate each with a general purpose silicone-base lubricant. Then gently
slide each over the top edge of the valve plug.
For ED/EWD Valves
1. Remove and discard the piston rings (key 6). The rings can be easily removed since each is in two pieces.
2. Inspect the valve plug (key 2A) and stem (key 2B) for nicks, scratches, or other damage that would prevent proper
operation of the valve. If replacement of either is necessary replace as a complete valve plug and stem assembly
(key 2).
3. Each new piston ring (key 6) is furnished as a complete ring, and each must be broken into two approximately equal
portions. Do this by placing the ring on edge on a smooth, hard surface and striking the ring squarely with a
hammer.
4. Install the replacement piston ring(s) into the groove(s) in the valve plug (key 2A). Be sure to match the broken
ends when installing the ring sections in the groove(s).
For ED/EWD Valves Equipped with the Bore Seal
1. Remove and discard the piston ring (key 6). The ring can be easily removed since it is in two pieces. Also inspect the
bore seal (key 64) and retainer (key 2C) for nicks, scratches, or other damage that would prevent proper operation
of the valve. If replacement of the bore seal is necessary complete steps 2 – 12, otherwise proceed directly to
step 13.
2. Referring to figure 3, locate the staked thread on top of the valve plug (key 2A). The staked thread secures the
retainer (key 2C). Use a drill with a 1/8 inch bit to drill out the staked area of the thread. Drill approximately 1/8 inch
into the metal to remove the staking.
