Emerson Keystone K-LOK 360 Series Leitfaden
Keystone K-LOK®HIGH PERFORMANCE BUTTERFLY VALVES
Figure 360/362 and 370/372
Caution
The standard seat retainer screws only provide enough force to hold the seat retainer ring for shipment
and installation. If cycling or testing of the valve is required prior to installation, the seat retainer must
be pressed into the seat to prevent damage to the seat or leakage past the seat.
8. Install the seat-retaining ring using the flange bolt guide or retaining clips to align the ring with
the body.
9. Install and tighten the socket head screws.
10. When pressing the seat retainer into the seat and body, use C-Clamps. The number of
C-Clamps used should equal half the number of flange bolts of the valve. For instance, if the
valve has 12 flange bolts, 6 C-Clamps should be used. To press the seat retainer ring with
the C-Clamps, place the C-Clamps around the valve assembly to allow an even load to be
applied all around the seat retainer ring. Tighten until the seat retainer gasket is compressed.
After the gasket is compressed by the C-Clamps, complete the tightening of the socket head
screws.
PtFe, RtFe and uHMWPe seats
Caution
Always use the cardboard or brass shims to protect the valve body, disc, flange and sealing surfaces
from damage. Failure to do so may result in serious damage to the valve.
1. Remove the socket head screws which secure the flange locator plates on the wafer-style
valves, the retaining clips on lug-style valves, or the seat retaining ring on bi-directional dead-
end service valves.
2. Remove the flange bolt guides or retaining clips.
3. Remove the seat retainer ring. Do not gouge or leave a raised edge on the seat retainer ring.
4. Remove the seat and if applicable the body seat retainer ring gasket.
5. Check and clean the disc edge and seat pocket. If the disc edge is damaged, contact the factory
for a disc replacement assembly. Make certain that all gasket and sealing surfaces are clean
and undamaged. Remove any gasket material that may have adhered to the mating body
surfaces.
6. Close the disc. Make sure the disc is centered in relation to the body waterway bore. If it is not
centered, contact the factory. Be sure to position the disc against the disc position stop located
in the valve body.
7. With the disc in the closed position, install the new seat and external gasket. Refer to Figure 1
for proper orientation.
note
Installing a seat in a valve that has been modified for Bi-directional Dead End Service:
To allow the seat retainer ring dead end service bolts to pass through the gasket,
modify the seat retainer ring gasket by following these steps:
a. Use the dead end service seat retainer ring to layout the bolt hole pattern.
b. Using a hole punch, make the required holes in the gasket.
VCteC-06259-en 16/10
Seat replacement instructions:
K-LOK Series 360/362 - ASME 150
K-LOK Series 370/372 - ASME 300
www.valves.emerson.com © 2017 Emerson. All rights reserved.
2
PolyMeR seats: PtFe, RtFe and uHMWPe
1. If required, assemble the wire wrapped seat with the seat backing ring. Orient the mid-section
of the backing ring with the wire wrap knot. Insure the backing ring is completely inserted into
the polymer seat.
Install the new seat and body seat retainer gasket. The seat large ID taper should be located
against the disc edge. Refer to Figure 1.
nBR, ePdM, and FluoRoelastoMeR (FKM) seats
Follow Steps 1 - 3 for the PTFE, RTFE and UHMWPE seated valves on page 1.
4. Remove the seat. Seat assembly consists of a rubber ring. Seat retaining ring gaskets are not
used with the elastomer seats.
5. Check and clean the disc edge and seat pocket. If disc edge is damaged, contact the factory for
a disc replacement assembly. Make certain that all gasket and sealing surfaces are clean and
undamaged.
6. Close the disc. Make sure the disc is centered in relation to the body waterway bore. If it is not
centered, contact the factory. Be sure to position disc against disc position stop located inside
the valve body.
7. With the disc in the closed position, install a new seat. Do not use any gaskets between the
valve body and seat-retaining ring when installing an elastomer seat. Refer to Figure 2 for
proper orientation.
8. Install the retaining ring using the retaining clips to align the ring with the body.
9. Install and tighten the socket head screws.
Caution
The standard seat retainer screws only provide enough force to hold the seat
retainer ring for shipment and installation. If cycling or testing of the valve is required
prior to installation, the seat retainer must be pressed into the seat to prevent
damage to the seat or leakage past the seat.
10. When pressing the seat retainer into the seat and body, use C-Clamps. The number of
C-Clamps used should equal half the number of flange bolts of the valve. For instance, if the
valve has 12 flange bolts, 6 C-Clamps should be used. To press the seat retainer ring with
the C-Clamps, place the C-Clamps around the valve assembly to allow an even load to be
applied all around the seat retainer ring. Tighten until the seat retainer gasket is compressed.
After the gasket is compressed by the C-Clamps, complete the tightening of the socket head
screws.
Gasket
Disc
Seat assembly
Flange bolt guide
Disc position
stop
FIGURE 1
Body
Disc
Seat assembly
Flange bolt guide
Disc position
stop
FIGURE 2
Body
Keystone K-LOK®HIGH PERFORMANCE BUTTERFLY VALVES
Figure 360/362 and 370/372
3
Keystone K-LOK®HIGH PERFORMANCE BUTTERFLY VALVES
Figure 360/362 and 370/372
Metal and FiRe-saFe seats
1. Remove the socket head screws that secure the bolt guides on wafer-style valves, the retaining
clips on lug-style valves or seat retaining ring on bi-directional dead-end service valves.
2. Remove the flange bolt guides or retaining clips.
3. Remove the retaining ring.
4. Remove the seat and external gasket. Be sure to remove both the convoluted stainless steel
portion of this two-part seat as well as the RTFE.
5. Check and clean the disc edge and seat pocket and make certain that all gasket and sealing
surfaces are clean. If disc edge is damaged, contact the factory for a disc replacement
assembly. Remove any gasket material that may have adhered to the mating body surfaces.
6. Close the disc. Be sure to position disc against disc position stop located in the valve body.
Make sure the disc is centered in relation to the body waterway bore.
7. Install new gasket.
8. Install new two-piece fire-safe or one-piece metal seat in seat pocket. Refer to Figure 3 for
proper orientation.
9. Install retaining ring using flange bolt guides or retaining clips to align retaining ring with the
body.
10. Install and tighten the socket head screws.
Caution
The standard seat retainer screws only provide enough force to hold the seat
retainer ring for shipment and installation. If cycling or testing of the valve is required
prior to installation, the seat retainer must be pressed into the seat to prevent
damage to the seat or leakage past the seat.
note
Sizes DN 350 - 600 (NPS 14 - 24) body valves employ both clips (for wafer and for lug) and locating plates to
retain the seat retainer ring.
Sizes DN 750 - 900 (NPS 30 - 36) wafer and lug body valves use seat retainer screws instead of the hex socket
flat head screws with clips or locating plates.
These seat retainer screws are located directly in the face of the seat. Two of these seat retainer screw holes
are tapped. The two tapped holes allow the use of eye bolts so the seat retainer ring can be lifted to and from
the body.
11. When pressing the seat retainer into the seat and body, use C-Clamps. The amount of
C-Clamps used should equal half the number of flange bolts of the valve. For instance, if the
valve has 12 flange bolts, 6 C-Clamps should be used. To press the seat retainer ring with
the C-Clamps, place the C-Clamps around the valve assembly to allow an even load to be
applied all around the seat retainer ring. Tighten until the seat retainer gasket is compressed.
After the gasket is compressed by the C-Clamps, complete the tightening of the socket head
screws.
FIGURE 3
Flange bolt guide
Gasket
Metal seat
Body
Fire-safe seat Disc
Disc position stop
4
Caution
It is recommended to keep the valve assembly firmly C-clamped together should actuation cycling
be required before installation with the piping flanges. Insure C-clamps are located properly to allow
opening and closing.
note
Sizes DN 350-600 (NPS 14-24) wafer and lug valve bodies employ both retention clips and flange locating plates
to retain the seat retainer ring.
Sizes DN 750-900 (NPS 30-36) wafer and lug valves use seat retainer ring screws located directly in the face
of the seat retainer ring. Two of the seat retainer ring bolt boles are tapped to allow the use of eye bolts for
removal / installation of the seat retainer ring.
All sizes of bi-direction end of line lug valves use seat retainer ring screws located directly in the face of the seat
retainer ring.
3. Use strong forged steel C-clamps to press the seat retainer ring and stretch the seat around
the disc OD and into the valve body. Four C-clamps are recommended but the number of
C-clamps may vary depending on the valve size; small valves can be assembled with two
C-clamps and large valves should use at least four C-clamps.
Locate the C-clamps evenly around the valve assembly and begin applying even loads to the
C-clamps. Insure the seat retainer ring maintains an even distance from the body gasket
surface as it is being pressed into the body. Continue evenly pressing the assembly together
until the seat retainer ring is firmly compressed against the body gasket.
4. Locate the C-clamps evenly around the valve assembly and begin applying even loads to the
C-clamps. Insure the seat retainer ring maintains an even distance from the body gasket
surface as it is being pressed into the body. Tighten the socket head screws using a short
handle Allen wrench. Do not over tighten and damage the screw hex socket. While tightening
the screws, use a proper size plastic mallet to firmly strike the seat retainer ring near the
screw being tightened. Firmly hand tighten.
Continue evenly pressing the assembly together and tightening the screws until the seat
retainer ring is firmly compressed against the body gasket.
5. If the valve assembly is not to be opened or closed while not installed between flanges,
removethe C-clamps.
stePs 1-4: all seats
1. Locate the seat retainer ring with the body and gasket using the flange locator plate/screws
and/or the retainer clips/screws or bi-directional end of line seat retainer ring screws.
2. Install and slightly tighten the socket head screws. Insure the seat retainer ring is evenly
located with the body gasket surface when initially bolted to the body.
Caution
The standard seat retainer ring screws only provide enough force to hold the seat retainer ring for
shipment and installation. Prior to installation, the seat retainer ring must be pressed into the seat and
body gasket to prevent damage to the seat or leakage past the seat.
Keystone K-LOK®HIGH PERFORMANCE BUTTERFLY VALVES
Figure 360/362 and 370/372
© 2017 Emerson. All rights reserved.
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