TABLE OF CONTENTS
DIRECTIVE CONFORMANCE DECLARATIONS ............................................ 4
INTRODUCTION .............................................................................. 6
Applications and purpose of use ................................................................. 6
Restrictions on use for SKW and SKF valves .................................................. 6
Using the valve in explosive conditions ....................................................... 6
Mechanical structure ............................................................................. 8
TRANSPORTATION, STORAGE AND LIFTING .......................................... 13
INSTALLATION ............................................................................. 14
Flow direction, support, and valve position ................................................. 15
VALVE OPERATION........................................................................ 20
Commissioning and decommissioning ......................................................... 20
SERVICING AND MAINTENANCE ......................................................... 21
General maintenance and checks .............................................................. 21
Scheduled maintenance ........................................................................ 22
Changing the secondary seal .................................................................... 24
Removing the actuator, gate, and tower .................................................... 26
Dismantling the valve body .................................................................... 27
Valve body, secondary seal, and gate assembly ........................................... 28
Tower and actuator assembly ................................................................. 29
Testing and adjusting the valve stroke ...................................................... 30
Final assembly and testing ..................................................................... 30
Appendix A: Main measurements of SKW and SKF valves .......................................... 32