b'MULTI-WAY BALL VALVES - BV509/509A, BV2057, BVL50~L54, SL8142-FZ SERIESe)Valves will operate at any angle horizontally or vertically, although it is recommended you install valves in a vertical position with stem pointing upwards for ease of operation, inspection and accessibility.f)Before installation, please make sure if the marking on the valve (such as pressure flow direction, material, etc.) is in accordance with the application requirement.g)Remove the protective plastic cap and clean or flush the valves.h)Prior to mounting, flush and/or clean the pipeline to remove all accumulated extraneous matters which could cause damage to the seats and ball surface.i)Make sure the flow direction, which direction mark is shown on the handle. The valve may be fitted in any position on the pipeline.j)Use conventional sealant (e.g. Teflon) on the threads and gasket (for flanged ends), as required for service type.k)For screwed end valves, apply wipe wrench on the end cap of the valve only while tightening. Tightening by using the valve body or handle can seriously damage the valve.l)For screwed end valves, unions to be installed before each end for easy installtion and disassembly of the valve.m) The pipeline shall be free of tension after installation.n)When fitting an actuator, operating torque requirements will vary depending on the length of time between cycle, media in the system line pressure and type of valve seat. Figures in Appendix A show torques for TFM1600 or PTFE seats with clean cold water as the media and valve toqrue of maximum pressure differential.Actuation use: where a stop lock cap (see Appendix B & D) is used, it must remain on the valve when fitting an actuatorIt is possible with the ball in closed condition, the sealed cavity inside the valve body is filled with liquid. If this liquid is not released by partially opening the valve and the valve is subject to a temperature increase, excessive pressure can occur inside the body. Self-relieving pressure seats can prevent pressure build up. However, to prevent a pressure build-up inside the valve exceeding the design pressure, the piping design, installation, or operation procedure of end user should prevent this situation from occurring.2.1 INSTALLATION POSITIONS3 & 4 Seated Multi-way Ball valves are bi-directional, and therefore may be installed in either direction. In some cases, ball valves such as metal to metal seated and low temperature valves may be uni-directional, in which case the direction of flow will be indicated on the valve body.Flowturn - Installation, Operation and Maintenance Manual 7'