b'FLOATING BALL VALVES - SLFSBV01 & SLBV01 SERIES4.2 BODY SEALSealing between two body segments is provided with a gasket (Teflon, spiral wound or graphite) and both valve segment surfaces also provide metal to metal sealing. In case of slight leakage the fastening bolts can be lightly tightened up.If a gasket seal is disturbed while removing or adjusting gasketed parts, APV recommends installing a new gasket while reassembling. A proper seal is required to ensure optimum operation.METAL TO METALGASKETCAP BODYFIG 5. STRUCTURE OF GASKET IN BODY JOIN4.2.1 Body Gasket TighteningShould leakage occur at the body/bonnet joint, tighten bonnet bolts to the values shown in Table 1 (refer Appendix). If after tightening body bolts, leakage continues, replacement of gasket is recommended. A new gasket is recommended anytime the valve is disassembled. The following procedure shown in 4.3 is recommended for the replacement of the gasket and other trim components.4.3 INSPECTION AND REPLACEMENT OF TRIM COMPONENTS Disassembly: -1.Place the valve in the half open position and remove all pressure and drain the system. Make sure that leakage of any residual material is caught in an appropriate container and disposed of properly.2. For gear operator or power actuator operated: - remove the bolt fastening the gearbox or power actuator. Remove the gear operator or power actuator. Remove the bolt fastening the yoke or yoke nut (depending on size/class).3. For lever operated: - remove the screw or circlip fastening the lever. Remove the lever. Remove the retainer/lock washer and the stop plate.4. Follow disassembly procedure 4.4 below.12 Australian Pipeline Valve - Installation, Operation and Maintenance Manual'