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TYPE 31

Cameron TYPE 31 Installation, Operation And Maintenance Manual

ENGINEERED VALVES
Installation, Operation and Maintenance Manual
®
CAMERON
TYPE 31
FULLY WELDED BODY BALL VALVE
®
CAMERON
ENGINEERED VALVES
TABLE OF CONTENTS CAMERON TYPE 31
FULLY WELDED BODY BALL VALVE
Bill of Materials ................................................ 1
Scope .............................................................. 2
Nameplate Information .................................... 2
Storage ............................................................ 2
Installation ....................................................... 3
Maintenance .................................................... 6
Trouble Shooting ............................................. 8
Injection Procedures ...................................... 10
Valve Cleaning ............................................... 11
Sealant Injection .............................................12
Stem Designs .................................................15
© Cameron’s Valves & Measurement Group IOM-CAM-BALL-T31
Rev. 0 06/09
Bill of Materials
ENGINEERED VALVES
1
2
3
4 5
8
9
6
10
7 5
11
Figure 1 - Cameron Fully Welded Body Ball Valve Components.
ITEM DESCRIPTION
1 Keyed Shaft 2 Upper Stem Seal* 3 Upper Body 4 Lower Stem Seal 5 Stem Bearing 6 Dog 7 Ball 8 Seat Ring 9 Lip Seal
10 End Connection
11 Lower Body
*Details of stem are on pages 15 and 16.
1
Scope
ENGINEERED VALVES
One of the most trusted valves in the petroleum industry, the CAMERON T31 Fully Welded Body Ball Valve combines the strength of forged components with a lightweight and compact spherical design. CAMERON T31 Fully Welded Body Ball Valves satisfy ASME 150 through 2500 (PN 20 through PN 420) and API 2000 through 10000 standards. Made of forged steel to assure uniform fine grain structure and toughness, they may be specified in sizes from 2" to 56" (DN 50 to DN 1400).
Engineered for heavy-duty maintenance, the CAMERON T31 Fully Welded Body Ball Valve is commonly selected for a number of applications. The distinctive design of the CAMERON T31 Fully Welded Body Ball Valve gives it maximum strength and minimum weight as well as maximum resistance both to pipeline pressure and stresses. The compact, spherical design also eliminates body flanges, thus reducing overall size and leak paths.
Nameplate Information
ITEM STAMP
1 Nominal Valve Size x Actual Bore Size. 2 Maximum Temperature 3 Minimum Temperature 4 Body Material Symbol 5 Seat Insert Material Symbol 6 Assembly Part Number 7 Valve Length 8 API Class Designation
9 Maximum Working Pressure 10 Maximum Operating Pressure 11 Seat Material Symbol 12 Ball Material Symbol 13 Valve Assembly Serial Number 14 Month and Year of Manufacture
Figure 2 - Typical Valve Nameplate.
service and minimal
Storage
The valves are conditioned for a storage period of approximately six months. The following care should be taken when storing valves.
1. Make sure the valve end connection covers remain in place during storage.
2. If the valve does not have an operator already installed and the valve will be stored outside, the open stem extension or the stem adapter should be covered to avoid water buildup.
3. If long-term storage is required, the valve should be conditioned using a corrosion inhibitor and end connection covers. Follow the guidelines found in CAMERON Engineering Bulletin 476B for long term storage. Obtain a copy from your Cameron Valves & Measurement representative.
2
Installation
Handling of Valves
1. The valve should be lifted in such a way that the body supports the load.
CAUTION: The journal and the end connection necks are suitable places to attach lifting slings. Never use handwheels or other protruding parts of the gearbox or actuator not designated for this purpose.
2. If the valve is equipped with lifting lugs, these should be used for handling.
3. The end protector covers should be kept in place on the end connections during all handling. Remove only during final installation of the valve.
ENGINEERED VALVES
Figure 3 - Correct valve lifting using End Connection Necks.
CAUTION: During handling, protect the end connection faces and fittings against damage from the lifting devices. Failure to cover faces and fittings could cause damage to the valve.
Position of Valve
The ball valve may be installed in any position. Either end of the valve may be installed as the upstream end.
Protection of Ball
CAUTION: The ball should be fully open during the installation of the valve. Failure to keep the ball fully open during installation could cause damage to the valve.
If the ball must remain in the closed position during installation of the valve, coat the exposed surfaces of the ball with grease. This will protect the plug from damage due to weld splatter.
CAUTION: Do not leave the valve in the partially open position for an extended period of time.
CAUTION: A weld end valve without pup pipes should never be installed in the closed position.
Welding Instructions
When preheating, welding or stress relieving, body temperatures must not exceed 400°F (200°C) at any point beyond 3" (75 mm) from the weld. Use tempil sticks to check temperatures. Before CAMERON T31 Fully Welded Body Ball Valves are welded into final position in the pipeline, cover the valve seal areas (ball-to-seat area and seat-to-end connection area) with 1" wide masking tape from the 3 o'clock to the 9 o'clock position. This will help prevent any foreign material from becoming lodged in these areas. The piping system should also be pigged before operation or pressure testing to remove any foreign material from the pipeline.
EQUALIZING YOKE
Figure 4 - Correct lifting using the valve Lifting Lugs.
3
Hydrostatic Testing
ENGINEERED VALVES
When CAMERON T31 Fully Welded Body Ball Valves are installed in a piping system that requires hydrostatic testing of the adjoining pipe, follow these procedures to minimize any damage that could occur to the sealing surfaces and seat seals inside the valve.
1. Valve should be in the fully open position when the injection of test fluid begins. This will allow any pipeline debris to be flushed through the valve bore and out of the piping.
2. Once the piping system has been purged of debris and the system has been filled completely with the test fluid, the ball valve should be placed in the partially open position (approximately 10° from the fully open position). This allows test fluid into the body cavity of the valve.
3. The valve is now ready to be pressure tested.
4. Upon completion of hydrostatic testing, the valve should be returned to the fully open position before removing the test fluid from the piping system. The test fluid in the body cavity can be drained through the body drain port located on the lower portion of the valve body.
5. Once the valve and piping system have been pigged and customer product is injected into the piping system, the valve should be moved to the partially open position (approximately 10° from the fully open position). Any remaining test fluid trapped in the valve body cavity can then be vented through the body bleed plug, located on the lower portion of the valve body. If the valve has been fitted with a stem extension, the vent fitting will be located below the mounting flange on top of the extension.
6. Opening the body bleed fitting will force trapped test fluid out of the body cavity. Keep the bleed plug open until all fluids have been exhausted through the body bleed plug.
7. Close the valve body bleed fitting and return the valve to the fully open position or the required operating position.
8. The valve seat pockets should be filled with an approved valve flush product to displace any test fluid. Refer to Routine Seat Cleaning which appears on page 7.
2. Depending on the valve stem and the actuator/ gear mounting kit, it is possible that the actuator may be installed in multiple positions. If this is the case, determine where the customer desires the handwheel or actuator control panel and install it accordingly. (A thin layer of antiseeze on the valve stem is recommended.)
3. Once the operator is mounted, secure it with the appropriate bolts. If the bolt holes do not line up, slightly operate to the open or closed to match the mounting flange. If you are unable to operate the operator, performing steps 2 and 3 of Setting Stops may need to be conducted.
4. It is now necessary to set the operator stops as outlined in the following section.
Setting Stops
Gear Operator with Stops
1. Make sure that operating the valve to the fully open and fully closed position will not disrupt current operation of line.
2. Loosen the open and closed stop screw locknuts.
3. Turn stop screws counter-clockwise to increase gear travel.
4. Operate the valve to the fully open position.
5. Utilize the stem stop viewports to verify valve position. (Refer to Open and Closed Viewports on page 6.)
6. Turn the open stop screw clockwise until it stops, then tighten the locknut. If the stop screws will not turn, repeat steps 3 and 4.
7. To set the closed stop, conduct steps 3 - 6, operating the valve to the closed position and utilize the closed stop.
STOP SCREW (CLOSED)
LOCKNUT
SHUT
STOP SCREW (OPEN)
LOCKNUT
Mounting the Gear/Actuator
To mount a gear or power operator on a valve, use the following guidelines. Note: The guidelines
OPEN
INDICATOR CAP (SHOWN OPEN)
given are for typical gear and actuator designs.
Specific instructions for each design should be obtained from the gear / actuator manufacturer.
APPROXIMATE LOCATION OF BLANKING PLUGS (IF PRESENT)
1. Make sure the valve is in the fully open or closed position and position the actuator to match.
Figure 5 - Typical Gear Box with Stops.
4
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