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Undated "Operation & Maint Manual for C&S Tricentric Stop Valve

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Undated OPERATION AND MAINTENANCE MANUAL FOR C 5 S TRICENTRIC STOP VALVE VALVECOMPANY TRICENTRIC DIVISION 9305060089 911031 PDR ADOCK 05000410 PDR 4 OPERATION AND MAINTENANCE MANUAL FOR C & S TRICENTRIC STOP VALVE CUSTOMER: NIAGARA MOHAWK POWER CORPORATION NINE MILE POINT NUCLEAR STATION C 5 S JOB NOS. NIAGARA MOHAWK P .0. NO. 90-1178 (Q) 89505 TABLE OF CONTENTS SECTION NO. PAGE SECTION 1- LIST OF VALVES SECTION 2- TRICENTRIC VALVE DESIGN FEATURES 2.1 PRINCIPLES OF OPERATION 2-1 SECTION 3- RECEIPT OF VALVES 3.1 RECEIPT INSPECTION 3-1 3.2 STORAGE 3-1 3.3 SHELF LIFE 3-1 3.4 TOOL REQUIREMENTS FOR INSTALLATION AND MAINTENANCE 3-1 SECTION 4- INSTALLATION 4.1 PRIOR TO INSTALLATION 4-1 4.2 INSTALLATION 4-1 4. 3 INSTALLATION CHECKLIST 4-1 4.4 ACTUATOR INSTALLATION AND ADJUSTMENT 4-2 4.5 ACTUATOR OPERATING INSTRUCTIONS SECTION 5- MAINTENANCE 5. 1 GENERAL MAINTENANCE 5-1 5.2 PACKING CHANGE INSTRUCTIONS 5-1 5.3 SPARE PARTS 5-1 5.4 ACTUATOR MAINTENANCE 5-2 SECTION 6- VALVE DISASSEMBLY 6.1 VALVE DISASSEMBLY PROCEDURE 6-1 SECTION 7- VALVE ASSEMBLY 7.1 ASSEMBLY PROCEDURE 7-1 7.2 ACTUATOR ASSEMBLY AND ADJUSTMENT 7-2 SECTION 8- DISC SEAL REPLACEMENT PROCEDURE 8.1 INSPECTION 8-1 SECTION NO. PAGE 8.2 REMOVAL OF THE CLAMP RING 8-1 8.3 REMOVAL OF THE SEAL STACK 8-2 8.4 INSTALLATION NEW SEAL STACK 8-2 8.5 FLOATING THE DISC SEAL 8-3 SECTION 9- BOLT TORQUE TABLE SECTION 10 - ACTUATOR MANUAL SECTION ll - VALVE ASSEMBLY DRAWINGS SECTION 1- LIST OF VALVES CUSTOMER P. 0. 89505 CUSTOMER TAG NO. SIZE C & S Serial No. ASSEMBLY ORAWING NO. II 2 CNM-MOV84A 2 4 90-1178-01(N ) -01 0-1018 II 2 CNM-MOV84B 24 90-1178-01(N ) -02 0-1018 2 CNM-MOV84C 24" 90-1178-01(N) -02 0-1018 SECTION 2 - TRI CENTRIC VALVE DESIGN FEATURES 2.1 PRINCIPLES OF OPERATION C & S Tricentric Valves are designed to isolate or modulate upstream flow through a pipeline. The valve is of a "torque seated" design. This requires the valve to be actuated by an actuator with a minimum of 90 degrees of rotation. The actuator shall be capable of producing a minimum seating torque based on the valve size. The term "torqued seated" refers to the seal seating member of the valve. Mith the actuator properly adjusted, there shall be no mechanical stop positioning it in the closed position, other than the valve seal stack contacting the valve seat with the minimum required torque applied. The open position of'he valve shall be limited by the mechanical open stop of the actuator. 0 o 0 0 0 0 0 0 o o 0 o 0 0 0 0 0 0 2-1 SECTION 3 - RECEIPT OF VALVES 3.1 RECEIPT INSPECTION After uncrating the valve, check for visual damage that might have occurred during shipment. A. Missing parts. Use assembly drawing for reference. (Section No. 11) B. Scratches on the machined surface of the valve. 3.2 STORAGE When the valve is not put into immediate service it is required that the valve be stored in a heated building that is fire resistant, weathertight and well ventilated. Storage area shall be situated and constructed so that it will not be subject to flooding. C 5 S recommends that the valves be cycled approximately every 60 days. Any spare parts for the valve shall be stored in the original packaging and in the conditions as stated in the previous paragraph. 3.3 SHELF LIFE ITEM NO. DESCRIPTION MATERIAL SHELF LIFE 4 Seal Stack Monel Klinger C-4400 15 years Gasket Klinger C-4400 15 years 19 Packing ring Chesterton Style 1 3 years 19. 1 Packing ring Chesterton Style 5300 3 years All other recommended spare parts will have an indefinite shelf life. 3-4 TOOL REQUIREMENTS FOR INSTALLATION AND MAINTENANCE Any lifting devices used to move the valve into a desired position shall be of sufficient size to support the weight of the valve/actuator assembly. If it is necessary, to lift the valve by any other area of the valve body, other than the tapped holes in the valve body, the use of nylon slings (ie: as manufactured by Lift All, type EE2-803) is recommended to reduce the possibility of mechanical damage occuring to the valve body and actuator. There are no special tools required for installation and maintenance that are not commercially available. 3-1 SECTION 4 - INSTALLATION 4'.1 PRIOR TO INSTALLATION Before installation of the valve into the piping system, the body seat and the di.sc seal must be checked for dirt accumulations or damage due to transit or storage. For proper operation of the valve, the seat and the disc seal must be undamaged and free of foreign material. It is recommended that the valve be cleaned with a suitable solvent. Prior to installation, the valve must be in the closed position. 4.2 INSTALLATION Refer to the assembly drawings in this manual for the location and size of the tapped holes on each valve for lifting purposes. The valve should be installed with the shaft in a horizontal plane, this will reduce the axial load on the annular key and prevent debris build-up in the bearing area. However, it can be installed in a vertical or angular orientation, if so desired. For optimum performance, the shaft side of the disc on the'valve body indicates the high pressure side, which would be installed towards the upstream side of the line. This is extremely important if the valve is to operate as a tight shut off valve. The valve must be installed so that pipeline stresses are not transmitted to the valve body. Despite its solid manufacture, such stress may affect the valve operation. If pipeline stresses are severe, they should be cushioned by expansion joints or compensators. If supports are necessary . for the valve, they should only support the dead weight of the valve and should not serve as base points for the pipeline. 4.3 INSTALLATION CHECKLIST A. The shaft side of the disc is facing the side where maximum sealing is required. * B. All flange bolts torqued evenly and on a crisscross pattern? C. Valve installed so that no pipeline stresses are transmitted to the valve body? D. Is the pipeline clean of all foreign particles? E. Has the actuator been adjusted to allow the valve to torque seat? CAUTION 00 NOT LIFT THE VALVE BY AN ATTACHED ACTUATOR * Refer to section No. 9 for torque tables. 4-1 e SECTION 4- INSTALLATION 4.4 ACTUATOR INSTALLATION AND ADJUSTMENT For actuator mounting, refer to original manufacturing specifications. As previously stated in principles of operation, C 5 S Tricentric Valves are a "torqued seated" design. The following steps should be taken to assure the actuator performs this function when mounted on the valve. A. Valve should be in a fully closed position. 0 B. Confirm that the actuator has a travel range of 90 or greater, rotate the actuator to conform with the closed position of the valve disc. C. Hount actuator in the desired position and bolt to required speci fications. D. PartiaTlyopen valve and back off any mechanical stop incorporated in the actuator. E. Close valve and adjust mechanical stop until it engages the internal gearing, then back the stop off 2 or 3 turns and lock the stop in place. This will assure proper torque transfer to the valve seat. F. Open the valve until the disc is parallel to the valve body axis and set the mechanical stop to engage in this position. Any travel past this point could cause seal damage 4s5 ACTUATOR OPERATING INSTRUCTIONS SAFETY - Manual Gear Operating Instructions Do not use cheater bar to force handwheel. Execessim torque may cause damage to the valve or valve actuator. SAFETY - Electri c Operating Instructions Reverse rotation of valve control motor eliminates the protection of both the geared limit switch and torque switch. Reverse rotation of motor may damage the actuator and valve. (See electrical instruction and procedures.) Prior to electrical installation, move valve to mid-position by handwheel. The torque switch is adjusted at the factory and it is recommended that the adjustment not be changed without consulting the factory. Do not use cheater bar to force handwheel. Excessive torque may cause damage to the valve or valve actuator. SAFETY - Pneumatic Operating tnstructinns A. All valves fail (open) (close) (CW) (CCW) with loss of air pressure. B. Do not exceed maximum operation pressure of, the actuator. 4-2 C. Adequate protection should be provided'o insure that no operating personnel could be hurt by the valve closure. TROUBLE SHOOTING If handwheel is unusually hard to turn: 1. Check valve for improper l,ubri cation or damage. 2. Ensure that the valve packing gland is not too tight. 3. Check for faulty or damaged valve parts or obstruction. For more complete instructions, refer to section No. 10 (if applicable). If any questions arise, consult with C 5 S Valve Company's Field Service Department at (708) 789-8900. 4-3 SECTION 5 - MAINTENANCE 5. 1 GENERAL MAINTENANCE The Tricentric valves are generally designed to requi re no maintenance, however, areas are covered in this manual for disc seal replacement and packing changes. With use of a special bearing material 8505 Alloy 932 (Item 813), the shaft bearings are unlikely to ever require maintenance.'he packing gland follower ( Item 820) should be checked periodically for leakage. The stuffing box studs (Item 5'21) are to be tightened opposite successively and proportionately, until no leakage can be detected.
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