Instruction Manual
D100397X012
ES Valve
July 2017
12
WARNING
To avoid personal injury due to leaking fluid, avoid damaging gasket sealing surfaces. The surface finish of the valve stem
(key 7) is critical for making a good packing seal. The inside surface of the cage or cage/baffle assembly (key 3), or cage
retainer (key 31), is critical for smooth operation of the valve plug. The seating surfaces of the valve plug (key 2) and seat
ring (key 9) are critical for proper shutoff. Unless inspection reveals otherwise, assume all these parts are in good condition
and protect them accordingly.
2. Packing parts can be removed if desired. Replace these parts as described in the Replacing Packing procedure.
Remove the load ring (key 26) from an NPS 8 ES valve, or the cage adaptor (key 4) from any restricted trim valve,
and wrap it for protection.
3. Lift the valve plug and stem assembly out of the valve and set it on a protective surface. If the valve plug is to be
reused, protect the valve plug seating surface to prevent scratches. On an NPS 6 ES valve with Whisper Trim III cage
or WhisperFlo trim, also remove the bonnet spacer (key 32) and bonnet gasket (key 10) on top of the spacer. Then
on any construction with a cage retainer (key 31), remove the cage retainer and its associated gaskets.
A Whisper Trim III and WhisperFlo trim cage retainer has two 3/8 inch‐16 UNC tappings in which screws or bolts can be
installed for lifting.
4. Remove the cage or cage/baffle assembly (key 3), the associated gaskets (keys 10, 11, and 12), and shim (key 51 for
the ES valve, key 27 for the EAS valve). If the cage is stuck in the valve body, use a rubber mallet to strike the
exposed portion of the cage at several points around its circumference.
5. Remove the seat ring or liner (key 9) or disk seat (key 22), seat ring gasket (key 13), and the seat ring adaptor (key 5)
and adaptor gasket (key 14) where used in a restricted trim seat ring construction. PTFE seat constructions use a
disk (key 23) sandwiched between the disk seat and disk retainer (key 21).
6. Inspect parts for wear or damage which would prevent proper operation of the valve. Replace or repair trim parts
according to the following procedure for lapping metal seats or other valve plug maintenance procedures as
appropriate.
Table 5. Valve Stem Connection Torque and Pin Replacement
VALVE STEM CONNECTION (VSC)
BOLT TORQUE, MINIMUM TO MAXIMUM
HOLE SIZE
mm
Inches
N
S
m
Lbf
S
ft
mm
Inch
9.5
12.7
19.1
25.4
31.8
3/8
1/2
3/4
1
1‐1/4
40‐47
81‐115
237‐339
420‐481
827‐908
25‐35
60‐85
175‐250
310‐355
610‐670
2.41 ‐ 2.46
3.20 ‐ 3.25
4.80 ‐ 4.88
6.38 ‐ 6.45
6.38 ‐ 6.45
0.095 ‐ 0.097
0.126 ‐ 0.128
0.189 ‐ 0.192
0.251 ‐ 0.254
0.251 ‐ 0.254
Table 6. Standard Material Designations
Standard Designation
Common Name or Trade Name
CoCr‐A Hardfacing Alloy
R30006
S17400 SST
S31600 SST
CoCr‐A
Alloy 6 Casting
17‐4PH Stainless Steel
316 Stainless Steel
S41000, S41600, CA15
WCC Carbon Steel Casting
13Cr 400‐Series SST
WCC
CAUTION
To avoid damaging the ENVIRO‐SEAL bellows seal bonnet assembly, do not attempt to lap the metal seating surfaces. The
design of the assembly prevents rotation of the stem and any forced lapping rotation will damage internal components of
the ENVIRO‐SEAL bellows seal bonnet.
