wT 2858/02
Page 23
12.1.2
Replacement of Sealing Elements (Flange Connection)
»
Bring valve into OPEN position
»
Depressurize line
»
Remove valve from line
»
Remove body connection screws
»
Remove sealing elements and supporting rings (to the extent present) from the
body midsection
»
Bring the ball into the CLOSED position
»
Install new sealing elements and supporting rings (in the case of single-part sealing
elements, do not install supporting rings)
»
Reconnect body sections by means of body connection screws and tighten lightly
»
Tighten screws crosswise with required tightening torque as listed in the table
»
Function test
12.1.3
Replacement of Sealing Elements (Welded and Threaded
Ends)
»
Bring valve into OPEN position
»
Depressurize line
»
Loosen body connection screws and remove the three screws not stuck through
the body midsection eyelet
»
Swing out the body midsection
»
Remove sealing elements and supporting rings (to the extent present)
»
Bring the ball into the CLOSED position
»
Install new sealing elements and supporting rings (in the case of single-part sealing
elements, do not install supporting rings)
»
Reinsert body midsection between the connectors and tighten lightly
»
Tighten screws crosswise in accordance with required tightening torque as listed
in the table
»
Function test
12.2
Standard Lubricants
O-Rings: Silicone grease OKS 1110
Screw thread: MOLYKOTE 1000
Other parts: MOLYKOTE 55 M
In special cases, the designated lubricant must be used for the order.
e.g.: Oxygen applications Klüberalfa YV93-302
Gas applications Klüber Nontrop ZB91
Sterile steam applications Klüberalfa YV91
