When installing the screwed end, socket weld & flanged end valves the following respective procedures shall be followed for better performance.

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1 1. Storage LARSEN & TOUBRO LIMITED Page 1 of All valves are to be stored in fully open position, in order to protect the sphere surface and soft valve seats Before shipping, the inlet and outlet of each valve are provided with end protectors in order to protect it from any mechanical damage while keeping out dust and foreign objects during shipping and handling. Do not remove these caps until the valve is installed The valves shall be stored under roof in a well-ventilated dry, clean area, free from dust, rain & storm. Take special care not to damage the valve stems during handling Avoid placing the valves directly on the floor Valve shall be properly supported and secured before moving to prevent possible damage to valve, property or harm to personnel Carbon steel valves are coated with nontoxic Manganese Phosphating. This retards rusting during storage. Stainless steel valves have their natural finish and may not require any additional protection once installed. 2. Installation 2.1. The standard valve can be mounted in any convenient position, preferably with easy access to the packing gland nut, actuator, and positioner Valves shall not carry the weight of the piping. Proper support of the pipeline will minimize strain on the valve caused by shock in the pipe system The valve can be supported by its body with pipe clamps and supports. Do not fasten supporting structure to the flange bolts or actuators The valve may be installed with flow in either direction. It may be positioned horizontally, vertically, or at a gradient without impairing the operation of the valve Leave the valve in the open position and do not operate until the line has been thoroughly cleaned and flushed Pipe shall be flushed to clean dirt, welding residues, etc. which would damage ball or seats The valve shall be kept in OPEN position during installation and protective plastic covers shall be removed only at the moment of installation For actuated valves, please refer to the actuator manufacturer s recommendations for the valve s orientation to ensure optimal performance. When installing the screwed end, socket weld & flanged end valves the following respective procedures shall be followed for better performance Screwed End Installation Valves with screwed ends shall be treated as a single unit and shall not be dismantled when installing in pipeline Before installing, make sure that the threads on the mating pipe are free from grit, dirt or burrs.

2 Page 2 of Ensure correct thread size on the pipe ends Clean both the mating parts before assembly Use an anti-seize thread sealant to seal and prevent galling When tightening the valve apply a pipe wrench or spanner with flat jaws on octagon ends to the connector closest to the pipe being worked, using standard piping practices Sealant shall be applied only to the pipe or male threads Socket Weld End Installation Weld the valve as per the procedure LTF-EP-35-Welding of Socket Weld End Ball valves Flanged End Installation Once the end protectors are removed, carefully clean the flange faces of valves & pipe so that they are free from any dirt or grime, which would inhibit proper sealing Insert the valve and proper gaskets between the mating flanges. Align the flanges and valve. Valve should be installed in the open position The pipe flanges shall be correctly aligned with the valve flanges, as uneven tightening of the bolts may result in undesired stress elements both in the bolts and in the valve body When bolting the flanges together, bolt threads should be lubricated to obtain maximum loading on the bolts. The bolts shall be tightened using a criss-cross pattern for even loading Tighten the bolts gradually and evenly, each a bit at a time. Make sure that the bolts protrude beyond the nuts. After fitting the valve, check the bolts again and retighten any loose ones Make sure that valves are not subjected to any pipe loads Flush the pipe system carefully once the valve has been installed to remove all possible impurities. Valve shall be kept in fully open position during flushing. 3. Operation of the Valve 3.1. Clockwise rotation of lever closes the valve and anti-clockwise rotation opens the valve. This valve may also be automated For lever-operated valves, if the position of the lever is in line with pipe axis, then the valve is in open condition. The valve is in close position when lever is perpendicular to pipe axis. Stem flats also indicate the position of the valve - valve is open when the stem flats are parallel to the pipe axis and closed when the flats are perpendicular to the pipe axis Do not disturb the actuator open/close adjustment bolts setting All standard valves are bi-directional and as such, can be installed for flow in either direction.

3 Page 3 of Valve shall be fully open or fully closed to prevent damage to the seat and ball caused by wire drawing. Partial open/close position is not permitted Valves shall be opened and closed slowly to avoid hammering effect on the valve and pipeline. 4. Maintenance 4.1. Resilient seated valve products may wear over time resulting in loosening at component boundaries. If leakage is detected, tighten according to the steps and torque values outlined below. If tightening does not correct the problem, it is time to replace your seats and seals Stem Leakage Stem leakage shall be stopped as soon as it is detected. On actuated valves, most mounting hardware allows access to the packing adjustment screws. If this is not the case, it may be necessary to remove the actuator to gain adequate access to make the packing adjustment. Leakage in the stem packing area may be eliminated by adjusting the lower stem (gland) nut. Caution: Never back off the stem packing adjustment screws when the valve is under pressure Remove lever and other parts. Packing adjustment can be accomplished by turning the stem packing adjustment screws clockwise to the maximum torque shown in Table 1. Ensure stem does not rotate while tightening stem nut. If leakage persists, replace stem packing. Caution: Do not over tighten the adjustment screws. Over-tightening will result in excessive operating torque and shorten the packing s service life. If stem leakage continues, or operating torque becomes excessive, de-pressurize the valve and replace the stem seals. Table 1: Lock Nut / Lever Nut Tightening Torque Nut Size Tightening Torque, Nm M8 x M10 x 1 4 M12 x M14 x M16 x

4 4.3. Body Seal Leakage Page 4 of Check the torque of the body bolts according to Table 2 as per the sequence shown in Fig 1. Replace body seals if leakage persists. Table 2: Body Bolting Tightening Torque Bolt Size Tightening Torque, Nm M6 10 M8 22 M10 45 Fig. 1: Body Bolting Tightening Sequence 4.4. Seat Leakage Check whether the valve is in fully closed position. If leakage persists, the valve shall be disassembled and seats shall be replaced Remove and Cleaning the Valve If valve is in line, make sure system is purged and line, ball and cavity pressure are released before unbolting from piping system Remove all add-on components such as actuators and set aside Disassemble valve. Remove old seats and seals and discard them. Clean and dry metal components in preparation for reassembly Ball valves do not normally need internal lubrication or routine maintenance during service Packing may be adjusted if the valve is leaking around the stem, or the stem feels loose. See - Stem leakage maintenance.

5 Page 5 of Internal maintenance consists of replacing packing, seats and seals, and ball or stem if worn or damaged, and requires partial or full disassembly by qualified personnel following the instructions in this manual Valves with high operating torque not resulting from stem seal over-tightening or valves, which have leakage by the seats, may have damaged seats or ball surfaces. These valves shall be de-pressurized, disassembled, and inspected for damage. Lever Nut Internally Toothed Lock Washer Identification Plate Lever Belleville Spring (2) Gland Stem packing (2) Lock Clip Lock Nut Sleeve Hex. Nuts (4) Joint Seal (2) Seat (2) Ball Connector (2) Body Stem Thrust Seal Stem Hex. Bolts (4) Manufactured by LARSEN & TOUBRO LIMITED Coimbatore, India

6 Engineering Procedure Welding of Socket Weld End Ball Valves Ref LTF-EP-35 Rev / ECN 0 -- Date Page Page 1 of 3 1. Scope 2. Preparation This procedure describes the welding of Socket Weld Ball Valves on to the pipeline It shall be ensured that valves are received and stored in good condition. Also ensure that correct Material of Construction/Tag Number is selected for installing in a specific location Any dust, debris, etc inside the valve shall be removed. The pipeline shall be flushed to get rid of debris & weld spatter Pipe ends shall be smooth and free of any burrs. Operate the valve three times and ensure that it is smooth. 3. Disassembly 3.1. Because of the heat input during welding and the soft material used in the valve, it is required to dismantle the body and connectors before welding the connector onto the pipe The working area around the valve shall be kept clean and free from dust, dirt, debris etc. Keep the valve in OPEN position as shown in Fig Unscrew the four nuts joining the body and the connectors. Remove the body from the connectors Turn the valve to part Close position, and remove Seats and Joint Seals. In vertical pipeline, keep the valve in closed position Holding the ball carefully so that it does not fall out of the body, turn the valve to CLOSED position Remove the ball & keep all removed components in clean surface and protect them from dust and weld spatter Assemble the body (along with stem/lever) and connectors using two bolts diagonally. Fig 1: Exploded View of Three Piece Ball Valve Valve in OPEN position Joint Seal Tack weld Tack weld Prepared by SS Checked by JAM Approved by RM Date Date Date Form No.: DR-010-R1

7 Engineering Procedure Welding of Socket Weld End Ball Valves Ref LTF-EP-35 Rev / ECN 0 -- Date Page Page 2 of 3 4. Welding 4.1. Assemble dummy valve on to the pipe and ensure proper alignment. There shall be a gap of 0.5 to 1.0 mm between the pipe end and socket weld depth so the weld contraction does not create stress in the weld or component Tack weld the connectors on the pipe Dismantle the two bolts and remove the body from the connectors and keep all components in clean area free from debris and weld spatter Complete the weld, using qualified WPS welder, correct material and size of electrode. Protect the connector s face from weld spatter. Clean the welds thoroughly Allow the end connectors to cool to Atmospheric temperature. Wherever the system calls, carry out NDE on the welds Remove the two Joint Seals used in the valve from the body and scrap them. Assemble the Ball, Seats and Joint Seals on to the body. (Use the two new joint seals sent along with the valve). Note: Ball valves with graphite joint seals the seals shall not be removed from the body. They can be reused Keep the valve in OPEN Position and fit body between the two end connectors in correct orientation and assemble the four bolts. Tighten the nuts uniformly with a torque as given in the Table 1 and in the sequence shown in Fig 2. Table 1: Body Bolting Tightening Torque Bolt Size Tightening Torque, Nm M6 10 M8 22 M10 45 Fig 2: Tightening Sequence Prepared by SS Checked by JAM Approved by RM Date Date Date Form No.: DR-010-R1

8 Engineering Procedure Welding of Socket Weld End Ball Valves Ref LTF-EP-35 Rev / ECN 0 -- Date Page Page 3 of 3 5. Flushing of Pipeline 5.1. It is recommended that pipeline is flushed again to avoid damage to ball and seats. The valves shall be kept fully open during flushing operation After flushing is completed, operate the valve three times and ensure that it is smooth. It is recommended to carry out pressure testing of joints and valve. Prepared by SS Checked by JAM Approved by RM Date Date Date Form No.: DR-010-R1