Cameron WKM 370D6 User manual

Date: 4 March 2015
Document Number: TC-003001-30
Revision: Rev 01
WKM® 370D6 Ball Valve
Installation, Operation, and Maintenance Manual

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All the information contained in this manual is the exclusive property of Cameron. Any reproduction or use of the
calculations, drawings, photographs, procedures or instructions, either expressed or implied, is forbidden without
the written permission of Cameron or its authorized agent.
Initial Release 01
February 2015
TC-003001-30 / Rev 01

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TABLE OF CONTENTS
BILL OF MATERIALS........................................................................................................................................................5
SCOPE ............................................................................................................................................................................9
NAMEPLATE INFORMATION ........................................................................................................................................10
STORAGE......................................................................................................................................................................11
VALVES DELIVERED BY WKM ...................................................................................................................................11
INSTALLATION AND OPERATION INSTRUCTIONS ........................................................................................................11
BEFORE INSTALLATION SAFTEY INFORMATION.......................................................................................................11
INSTALLATION..........................................................................................................................................................12
FIELD TESTING..........................................................................................................................................................13
OPERATION..............................................................................................................................................................13
MAINTENANCE PROCEDURES......................................................................................................................................14
DRAINAGE PROCEDURE ...........................................................................................................................................14
LUBRICATION –GREASE INJECTION.........................................................................................................................15
370D6 VALVE RECONDITIONING .............................................................................................................................18
DISASSEMBLY...........................................................................................................................................................18
CLEANING ................................................................................................................................................................19
INSPECTION .............................................................................................................................................................20
REASSEMBLY............................................................................................................................................................20
GEAR OPERATOR ASSEMBLY ...................................................................................................................................25
ASSEMBLY TORQUE VALUES....................................................................................................................................27
TROUBLESHOOTING ................................................................................................................................................28
CONTACT INFORMATION ............................................................................................................................................29

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The procedures included in this book are to be performed in conjunction with the requirements and recommendations
outlined in API Specifications. Any repairs to the equipment covered by this book should be done by an authorized
Cameron service representative. Cameron will not be responsible for loss or expense resulting from any failure of
equipment or any damage to any property or death or injury to any person resulting in whole or in part from repairs
performed by other than authorized Cameron personnel. Such unauthorized repairs shall also serve to terminate any
contractual or other warranty, if any, on the equipment and may also result in equipment no longer meeting applicable
requirements.
File copies of this manual are maintained. Revisions and/or additions will be made as deemed necessary by Cameron.
The drawings in this book are not drawn to scale, but the dimensions shown are accurate.

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BILL OF MATERIALS
370D6 Series Standard Gearless Valve (see parts list in Table 1)
Figure 1 –370D6 Series Standard Less Gear Valve

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Table 1 –Parts List for Standard Gearless Valve
Item
Qty
Description
111
1
Body
112
1
Tailpiece
113
1
Lower Cover Plate
114
1
Adapter Plate
121
*
Body Studs
123
*
Body Nuts
124
*
Cap Screws –Lower Cover Plate/ Adapter Plate
132
1
Trunnion Bearing
134
1
Lower Stem Bearing
135
1
Upper Stem Bearing
146
1
Stem Key
151
1
Nameplate (Not Shown)
153
2
Caution Tag (Not Shown)
161
2
Grease Fitting
162
2
Check Valve
163
1
Stem Grease Fitting
171
1
Bleed Fitting
184
3
Torque Pin
185
1
Locating Torque Pin
211
1
O-Ring, Tailpiece
212
1
BACK-UP RING, TAILPIECE (Only For Class 1500 & 2500)
221
2
O-Ring, Stem
222
2
Back-Up Ring, Stem
224
1
O-Ring, Lower Cover Plate
225
1
BACK-UP RING, LOWER COVER PLATE (Only For Class 1500 & 2500)
231
2
O-Ring, Seat, Outer
232
2
Back-Up Ring, Seat, Outer
233
2
O-Ring, Seat, Inner
241
1
Stem Thrust Washer
241b
1
BALL THRUST WASHER (Only For 6” 900/1500 And All 8”Through 16”)
311
1
Ball
312
1
Trunnion
321
1
Stem
322
*
Stem Retaining Screw
323
2
Ball Drive Pin
325
*
Pipe Plug
330
2
Seat Assembly
341
2
Seat Spring
351
1
Ground Spring
*Quantities depend on valve size and class. Customer assembly drawings available upon request shall specify
quantities.

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370D6 Standard Wrench Head Valve (see parts list in Table 2)
Figure 2 –370D6 Series Standard Wrench Head Valve

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Table 2 –Parts List for Standard Wrench Head Valve
Item
Qty
Description
111
1
Body
112
1
Tailpiece
113
1
Lower Cover Plate
114
1
Wrench Plate
121
*
Body Studs
123
*
Body Nuts
124
*
Cap Screws –Lower Cover Plate / Wrench Plate
132
1
Trunnion Bearing
134
1
Lower Stem Bearing
135
1
Upper Stem Bearing
146
1
Stem Key
151
1
Nameplate (Not Shown)
153
2
Caution Tag (Not Shown)
161
2
Grease Fitting
162
2
Check Valve
163
1
Stem Grease Fitting
171
1
Bleed Fitting
185
1
Locating Torque Pin (Not Shown)
211
1
O-Ring, Tailpiece
212
1
BACK-UP RING, TAILPIECE (Only For Class 1500 & 2500)
221
2
O-Ring, Stem
222
2
Back-Up Ring, Stem
224
1
O-Ring, Lower Cover Plate
225
1
BACK-UP RING, LOWER COVER PLATE (Only For Class 1500 & 2500)
231
2
O-Ring, Seat Outer
232
2
Back-Up Ring, Seat, Outer
233
2
O-Ring, Seat, Inner
241
1
Stem Thrust Washer
311
1
Ball
312
1
Trunnion
321
1
Stem
322
*
Stem Retaining Screw
323
2
Ball Drive Pin
325
*
Pipe Plug
330
2
Seat Assembly
341
2
Seat Spring
351
1
Ground Spring
411
1
Wrench Head
412
1
Wrench Screw
413
1
Weather Protector
414
1
Wrench Washer
*Quantities depend on valve size and class. Customer assembly drawings available upon request shall specify
quantities.

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SCOPE
370D6 ball valves 2” FP to 16” FP are full bore, through conduit, bi-directional, anti-blowout stem, double block
and bleed in closed and open position, with trunnion mounted ball for easy operation. These valves can be
equipped with plastic seat inserts made of RTFE, NYLON, or PEEK as the customer requires. All the seats are self-
relieve type seats to eliminate cavity pressure lock. All valves have a built-in sealant injection system for
emergency seat seal and also a stem sealant fitting for stem seal recovery. The valve uses backed self-lubricating
PTFE sleeve bearings and thrust washers for low torque operation.
The 370D6 valves are available in the sizes and classes as per Table 3.
Unless otherwise specified on the purchase order, all the small sizes of valves are equipped with a wrench head
(noted W in Table 3) as standard; all other valves are equipped with a gear operator (noted G in Table 3). The hand
wheel can be removed from the gear shaft by taking out the roll pin.
Table 3 –370D6 Series Ball Valve Availability
Valve Availability
Valve Class/Size
150
300
600
900
1500
2500
2FP
W
W
W
W
W
W
3RP
W
W
3FP
W
W
W
W
W
W
4RP
W
W
4FP
W
W
W
W
G
G
6RP
W
W
W
W
G
G
6FP
W
W
G
G
G
8RP
W
W
G
G
G
8FP
G
G
G
G
G
10RP
G
G
G
G
G
10FP
G
G
G
G
12RP
G
G
G
G
12FP
G
G
G
14FP
G
G
G
16FP
G
G
G
All valves are built with trim selection and seals as the customer requires. Contact a WKM representative for
proper trim selection for the required application.

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NAMEPLATE INFORMATION
The valve information, including trim, is clearly identified on the valve nameplate that is permanently affixed on
the valve. Figure 3 shows a standard valve nameplate and Table 4 details the information stamped on the
nameplate.
Figure 3 –370D6 Ball Valve Standard Nameplate
Table 4 –Nameplate Information
Item
Preprint
Stamp
1
Size
If full bore, size is the nominal bore size
If reduced bore, size is end size x bore through ball x end size
2
Class
Valve Class Designation as defined per API 6D
3
SN*
Valve’s unique Serial Number
4
BM
Valve Bill of Material part number
5
MOP
Maximum Operating Pressure; the working pressure of the valve @ 100°F
and at maximum temperature
6
API
API Number the valve is in compliance with
7
Body**
Body Material Symbol
8
Temp
Operating Temperature Range
9
Model
Valve’s Model Designation
10
Stem**
Stem Material Symbol
11
Ball**
Ball Material Symbol
12
Seat**
Seat Material Symbol
13
Seals**
Seals Material Symbol
14
DOM
Date of Manufacture
15
MIT
Maximum Impact Temperature
16
LN
API License Number
*- Most important data for obtaining replacement parts
**- Consult a WKM Representative for material's symbol correspondence

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STORAGE
VALVES DELIVERED BY WKM
Following testing and prior to shipment, valves are drained of water and through bores and flange faces are coated
with grease and covered by protectors. This will protect the valves for a minimum of six months in covered storage
from the date of shipment. For long periods of storage and particularly harsh environments (i.e. as found in an
uncovered marine atmosphere) additional precautions must be taken.
All 370D6 valves should be stored in the full open position as received, with the flange seal surfaces and the bore
greased, and the protectors installed on the flanges. If long term storage is necessary, the valve should be
conditioned according to standard engineering practices; contact a WKM representative for long term storage
procedures.
INSTALLATION AND OPERATION INSTRUCTIONS
BEFORE INSTALLATION SAFTEY INFORMATION
Valves shall be operated and maintained strictly in accordance with these procedures. Operation or maintenance
outside of these procedures constitutes abuse of the product and voids all warranty and claims.
When special operation is required, a formal written request to the company must be made for approval to
operate in this manner if warranty and product liability is to be maintained.
Before any work is performed on a valve, personnel working on the valve must obtain the proper work permits
required by his employer. Personnel shall always use safety precautions set forth by the law and regulations
required by his employer. Personnel shall also be aware that any venting or draining of fluids from the valve shall
be done in accordance with safety and environmental procedures enforced at the particular location.
The maintenance personnel doing the repairs shall be well trained and familiar with all of the information
contained in this manual.
The valves shall be appropriately used for the intended purpose. Any safety or protection devices on the valve shall
not be permanently removed or altered unless written approval is received from a WKM representative.
Transport, unpacking, lifting, and connections to the different types of systems (electric, pneumatic, hydraulic
systems, etc.) shall be made by expert and qualified personnel.
Should any difficulties or abnormalities arise that cannot be solved by the technician, contact a WKM
representative.
Any servicing not covered by these instructions must be made by an authorized service center, after preliminary
approval has been given by a WKM representative.

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INSTALLATION
Before installation, ensure the grease fittings and sealing surfaces of connection flanges were not damaged during
transportation. Clearly identify the valve through its nameplate, check its weight with the packing list or relevant
documents, and then place it on a horizontal surface using suitable handling equipment.
Handling equipment must be provided which is appropriate for the total weight of the package. Pay particular
attention that slings do not damage the gear or actuator.
For 370D6 valves 8FP to 16FP use the lifting lugs or eyes on the valve for slinging. Do not use lifting lugs or eyes
provided on the gear or actuator, if present.
To avoid the ingress of debris or sand into the ball and seat area, the protective covers should not be removed
until the valve is ready to be installed in the line. When the valve is ready to be installed in the line, remove the
protective plastic or wooden flange protectors.
During installation the valve must be fully open and the line sections, between which the valve will be installed,
must be aligned, cleaned, and correctly spaced. Should the valve be closed, the exposed face of the ball must be
protected with grease or other anti-adhesive product.
When the valve has butt welding ends, welding on the line must be performed using the proper welding
procedure. After welding, clean and check the weld bead and repair as required.
WKM 370D6 valves are bidirectional and may be installed with either end facing upstream. The valve should be
installed in such a way as to facilitate maintenance, easy access to the valve fittings, and actuating operations.
370D6 valve standard position is with the stem in the vertical, upwards position and gear/wrench on the top side
of valve. In this position the drain/bleed fittings are located in the lowest part of the body which allows for the
most effective drainage. However, the valve may be installed in any position as far as stem location, but the drain
fitting will not be in the lowest part of body and the drainage may not be as effective.
CAUTION: If the valve cannot be properly drained (see Section 6.1) and the line’s foreign particles removed, the
seats may wear out, get damaged, or accumulate particles and water that may prevent easy operation and
affect the valve performance. It is the responsibility of the user to determine if the application may include
abrasive particles and the valve may be need to be installed in a different position than the standard stem-
upwards position.
When installing the valve, allow for possible deformations caused by the expansion of the line. The valve must not
support the line. Avoid any strain in the valve body.
CAUTION: Do not overload the valve beyond the design piping loads stated on the requirements.
Use studs, nuts, and raised face gaskets or ring joints as per size and class conforming to ASME B16.5. Alternately
tighten the studs using a cross pattern method, several times, following the procedure recommended by ASME
PCC-1-2010 “Guidelines for Pressure Boundary Bolted Flange Joint Assembly” or gasket manufacturer specification.

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FIELD TESTING
When field testing is required, the following procedures are recommended:
1. Ensure that the test fluids are compatible with the valve seat and seal material
2. Flush the system to remove foreign material that may be in the line as a result from installation
procedures to avoid damaging the ball and seats
3. If performing line shell testing, the valve shall be in half open position. The maximum line pressure can be
1-1/2 times the valve maximum cold working pressure
4. If performing seat testing, make sure the valve is fully closed. The maximum pressure for seat testing is
the maximum cold working pressure
5. After completion of testing, purge all test fluids from the valve
CAUTION: If the seats are tested to a higher pressure than the maximum cold working pressure, the seats can be
permanently damaged. If a higher test pressure is desired contact a WKM representative for details.
OPERATION
370D6 series ball valves only work in the fully closed or fully open position; these valves work for on/off service
only.
WARNING: These valves shall never be operated partially open or partially closed. Throttling (partial opening) or
“pinching” flow may cause non-uniform wear on seats and ball over the sealing surfaces where it is exposed to
the flow line, preventing tight shut-off.
To close the valve, turn gear hand wheel clockwise until it stops; to open the valve turn the gear hand wheel
counter-clockwise until it stops.
All the wrench operated valves have the wrench levers aligned along with valve through bore when opened and
perpendicular with the through bore when closed.
All gear operated valves have the gear indicator aligned with the valve through bore when opened and
perpendicular with the through bore when closed. The gear also has “OPEN” and “CLOSE” markings.
While opening or closing, the ball must reseat; this reseating torque is higher than the run torque. Turn the hand
wheel until the gear has a positive stop.
If the valve is operated by a power actuator, carefully read the actuator operation manual.
CAUTION: The end stops have been shop set to assure the correct 90 degree rotation from the fully open to fully
closed position. Do not change their adjustment. If the valve is not correctly reseated at the end of opening or
closing, the ball and the seats can quickly be damaged when exposed to flow pressure, preventing tight shut-off.

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These valves can be operated by one person. It is recommended that no extensions be used for operating the
valve. Using an extension or power tool to operate the valve voids all warranty and claims, and may result in
failure.
MAINTENANCE PROCEDURES
Under normal working conditions, 370D6 ball valves are designed for lengthy, reliable service. The following
recommended practices and procedures will ensure optimum performance.
DRAINAGE PROCEDURE
All valves can be drained and lubricated depending on application conditions, or anytime if desired. Valves may
accumulate water, scale, deposits, and other foreign matter during their service. These materials may damage the
valve in the following ways:
1. At low temperature, ice may form inside the valve and hinder its normal operation
2. Foreign matter may prevent the valve from fully closing and the ensuing throttling may damage the ball or
the seat seals
3. Foreign matter may get caught between the ball and the seat and damage their surfaces
A drainage schedule is the best way to prevent damage caused by foreign matter. However, it is recommended
that drainage should be carried out in the following cases:
1. Whenever the valve does not close
2. Before and during the cold season
3. After washing the line
4. After hydraulic test
5. Periodically to remove the accumulation of body debris. The frequency may be established based on the
contaminants in the application
For a drainage procedure, the following procedure is recommended:
1. 370D6 valves are double block and bleed in closed and also open position. The drainage can be done in
either the closed or open position. Make sure the valve is fully closed or fully open.
NOTE: The time to drain the valve depends on the size of the valve and the fluid in the line; significant
time may be required if the line contains a gas fluid. If the valve is drained in the open position, the time
will be shorter compared to if drained in the valve in the closed position due to the smaller body cavity to
drain when the valve is fully open.
2. Slowly open the bleed fitting (171) located on the lower side of the body.

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CAUTION: Open the drain fitting slowly until the pressure in the body cavity has been discharged. Make sure the
fitting body does not unscrew while loosening the fitting stem. If necessary, use another wrench to prevent the
fitting body from unscrewing.
LUBRICATION –GREASE INJECTION
The implementation of a regular lubrication program extends the service life of the valve before carrying out
maintenance operations and improves its performance. It is recommended to schedule a regular lubrication
program based on the frequency of operations and the severity of service. All 370D6 series ball valves have two
grease injection fittings located on the body seat area with the exception of the 2”, 3”, and 4” Class 150 & 300 that
have one grease fitting located in the center of the body.
Lubrication also may be necessary for a temporary seal restoration in the event of slight damage to the seats
caused by debris in the line; before operating the valve if the valve has been left in its position for a long period of
time; or as soon as an increase in stem torque is noticed.
CAUTION: Grease fittings should not be removed if there is pressure in the line. Grease fittings should never be
painted.
The gear operators are factory lubricated for life. If desired, the gear can be lubricated using the lube fitting
located on the side of the gear operator.
WKM 103 is an effective sealant; it is viscous grease with a thick consistency. It consists of synthetic oils, a
suspending agent, friction-reducing filler, plastic, and an antioxidant. WKM 103 Sealant may be used in valves with
a temperature range of -50° F through 250° F. This sealant is suitable in lines transporting hydrocarbon liquids and
gases where water, dilute acids, alkalis, or salt solutions may be present; as well as where sweet or sour produced
gas with water or organic condensate, LPG, and aqueous solutions are being transported. The gallon containers are
for use with bucket-type high-pressure grease guns. Gun cartridges are poly bags sized to fit screw/prime high
pressure handguns.
WKM 103 Sealant part numbers:
-K155812 Gun Cartridge
-K155849 1 gal –10 lbs.
-K155853 3 gal –30 lbs.
-K155857 5 gal –50 lbs.
-K155866 16 gal –150 lbs.
-K155869 55 gal –551 lbs.
WKM Lubricant 58G part number –K154208 –Gun Cartridge
For Lubrication and temporary seat or stem seal restoration with the valve under line pressure, follow the
instructions below:
1. Fill the WKM high pressure grease gun with valve sealant
2. Make sure the valve is in the fully open or fully closed position. For 2”, 3”, and 4” Class 150 & 300 valves,
lubrication is recommended in the fully open position

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Warning: Back up the seat grease fitting so only the safety vent cap will be removed from the fitting. Carefully
remove the safety cap from the seat grease fitting. NEVER remove the grease fitting when the valve is under
pressure.
3. Remove safety vent cap from grease fitting. Attach grease gun connection onto grease fitting and inject
sealant. If injection of the sealant is difficult, flush the valve seats and attempt to inject sealant again.
4. Repeat process for the second seat grease fitting as applicable, or the stem fitting. Replace safety caps on
all grease fittings.
Figure 4 –Typical Injection Fitting Figure 5 –Vent or Bleed Fitting
Table 5 shows a list of recommended lubricants by the cleaner/sealant manufacturer for the indicated service and
conditions. Use of other lubricants without WKM approval voids all warranty and claims. Contact WKM
representatives for availability.
Table 5 –Manufacturer Recommended Lubricants
Flush/Sealant Recommendations
Service
Condition
Product
Cleaner/Sealant Manufacturer
The valve Cleaner/Sealant
Manufacturer's contact
information can be found below:
WKM
VAL-TEX
Natural
Gas
Flush
Valve flush
Headquarters
Cameron Valves & Measurement
3250 Brairpark Drive, Suite 300
Houston, TX 77042
Tel. [phone]
Order 1-800 323-9160
Fax [phone]
Standard valve lubricant
WKM 58G
2000 light lube
Standard sealant
WKM 103
80 bulk/ 80-HS stick
Standard low Temp.
50 bulk / stick
Severe leak sealant
80+PTFE bulk / stick
Sour Gas
Flush
Valve flush
Standard valve lubricant
WKM 58G
2065 light lube
Standard sealant
WKM 103
65 bulk / stick

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Standard low Temp.
65 bulk / stick
www.c-a-m.com
VAL-TEX
Valves Inc. of Texas
10600 Fallston Rd.
Houston, TX 77099
Tel. [phone]
Order 1-800-627-9771
www.valtex.com
Severe leak sealant
80+PTFE bulk / stick
Dry CO2
Flush
Valve flush
Standard valve lubricant
WKM 58G
2300 light lube
Standard sealant
WKM 103
302 bulk / stick
Standard low Temp.
65 bulk / stick
Severe leak sealant
80+PTFE bulk / stick
Crude Oil
Flush
Valve flush
Standard valve lubricant
WKM 58G
2000 light lube
Standard sealant
WKM 103
80 bulk/ 80-HS stick
Standard low Temp.
50 bulk / stick
Severe leak sealant
80+PTFE bulk / stick
Table 6 lists the recommended quantity of lubricant per valve size and class.
Table 6 –Recommended Lubricant Quantities
Lubricant and Flush Volume (per valve size and class)
Valve size
Valve class
Lubricant per seat (ounces)
Valve Flush per seat (ounces)
2”
150-300
12
-
2”
600-2500
3
5
3”
150-300
16
-
3”
600-2500
4
7
4”
150-300
20
-
4”
600-2500
5
9
6”
150-1500
7
13
8”
150-900
9
17
10”
150-900
12
21
12”
150-900
14
26
14”
150-600
16
30
16”
150-600
20
36
Several high pressure guns can be used for lubrication:
Figure 6 –Screw/Prime Hand Gun Figure 7 –Bucket-type Gun
Part No. 2122495-01 Part No. K065189

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Figure 8 –Air Over Hydraulic Foot Pump Figure 9 –Adapter Fitting
Part No. 2330398-01 Part No. K296434
370D6 VALVE RECONDITIONING
The 370D6 valves can be rebuilt if necessary. The disassembly and reassembly of the valve requires proper lifting
equipment and normal maintenance tools.
Spare parts are determined by the individual customer specification; however the following list is suggested as a
minimum for typical maintenance operations:
-Stem and ball radial bearings
-Stem thrust washers and ball thrust washer (if applicable)
-All O-rings and applicable back-up rings
-Seat springs
-Seat subassemblies
-Drain fitting
-Grease injection fittings
CAUTION: Prior to disassembly, the valve must first be isolated from system pressure and flow. Operate the
valve at least two times and drain the valve to make sure there is no residual pressure left in the body.
After observing the above precautions, remove the valve from the pipe line system. Set the valve in a clean place
free of dust and/or metallic chips.
DISASSEMBLY
1. Operate the Valve to the closed position.
CAUTION: Prior to disassembly, verify that there is no pressure in the body cavity. Operate the valve at least two
times to bleed any residual pressure.
2. Stand the valve on the body flange end. Care should be taken to avoid damaging the sealing surface of the
raised face or ring groove (if applicable).
3. If wrench operated –remove the wrench screw on top of the stem, the washer, and the wrench.
4. If actuated valve –check the actuator operation manual and remove the actuator.
5. If gear operated –loosen the gear mounting hardware while lifting the gear until it comes off of the stem.

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6. Remove stem key. Unscrew the adapter plate or lever plate cap screws and remove the adapter plate
paying attention not to damage the torque pins.
7. Unscrew the stem grease fitting and the plug (if applicable), unscrew the stem retainer screw(s) and
remove it.
CAUTION: Failure to remove the stem retainer screw (one or two as applicable) will prevent the stem removal
from the body and may cause severe stem and screw damage during the following step.
8. Carefully pull the stem out of the body. To remove the stem, install a cap screw through the gear plate
into the threaded hole located on the top of the stem. Use a rubber mallet to hit against the gear plate
and gently pull the stem out. Remove the O-rings, back-up rings, and stem thrust washer and use a
screwdriver to also remove the stem bearings.
9. Remove the cap screw from the stem, and again utilize the gear plate to remove the trunnion from the
body.
10. Remove the lower cover plate O-ring and back-up ring (if applicable). Carefully remove the ground spring
located between the trunnion and ball.
11. Loosen and remove the body nuts.
12. Lift the tailpiece off of the body paying attention not to damage the body O-ring.
13. Remove the tailpiece O-ring and back-up ring if applicable.
14. Using a strap, lift the ball out of the body and lower it onto wood blocks. Take out the drive pins and
inspect the trunnion bearing and thrust bearing (if applicable). Remove bearings as necessary.
15. Remove the seat ring from the tailpiece, taking care not to damage the seals.
16. Remove the O-rings and the back-up ring from the seat assembly.
17. Remove the seat spring from the tailpiece pocket.
18. Repeat steps 15-17 for removal of the body seat assembly.
19. Remove the drain fitting and grease fittings.
CLEANING
CHEMICAL RESISTANT VINYL OR RUBBER GLOVES SHOULD BE WORN DURING CLEANING OPERATIONS
-Remove any foreign and corrosive products within the body.
CAUTION: Abrasive cleaning products should never be used, especially on sealing area. If water jetting is used,
dry with compressed air.
-Clean all metallic parts with a soft cloth saturated with a solvent. Observe all sealing surfaces.
-Clean the grease fittings and, if present, the grease channels.

20
TC-003001-30 / Rev 01
Feb-02
Clean the sealing rings and the gaskets with a soft cloth. If necessary, wash them with soap and rinse them with
clean water.
INSPECTION
After cleaning, all valve components should be inspected for damage, dents, scoring, wear, or corrosion. If any
damage is found, proceed with the repair where possible or with replacement of the parts.
For a complete inspection procedure, the following operations should be carried out:
1. Check the metallic parts for damage along the sealing surfaces and on moving surfaces. Particular
attention should be paid to surface nicks and corner damage.
2. Make sure that the sealing rings and gaskets are not slashed, extruded and/or otherwise damaged.
3. Check for scratches and plating defects on the surfaces of the bearings, the thrust washers, the O-ring
grooves, the ball, and the seat components.
4. Inspect all replacement components that are going to be used to ensure damage has not occurred in
storage or transportation.
5. If any damage is found, the minor repairs should be carried out by trained personnel, otherwise contact
WKM representative.
The minor repairs that may be carried out on site by maintenance personnel shall be in accordance with the
following points:
1. Use standard engineering practices to repair the damaged metallic surfaces.
2. Remove surface nicks on ball and stem by using a mild abrasive such as Scotch Brite pads.
3. Remove all corner damages by using a mild abrasive or with a bearing scraper.
4. Replace all faulty parts and components.
5. Flush lube and sealant while the valve is disassembled.
REASSEMBLY
After inspecting the parts and getting the replacement parts as required, use the following procedure to assemble
the 370D6 ball valve:
1. Place the body, on the ANSI flange, on a clean and solid surface that will hold the weight of the assembled
valve securely. Place the tailpiece on the ANSI flange. Take care not to damage the sealing surfaces.
2. If studs have been removed, install the studs in the body with the ID stamping up and the short end
threaded into the body and screw them down completely. Remove any particles which may have flaked
off the studs.