The valves covered by this document replace the valves of the VVF../VXF.. lines that have been produced by Siemens, Landis & Staefa and Landis & Gyr since 1974.
For most types of valves operating in the field, a one-to-one replacement is available.
This does not apply to a small number of special valves that were marketed in certain regions. If there is a need to replace such valves, please contact your Siemens branch office. In that case, it might be necessary to change the piping.
Stem coupling for SKC32../62/82..
(stock no. 4 178 5649 8)
Further use of actuators of the SKD32../60/62/82.., SKB32../60/62/82.., SQX31../61../81.., and SQX32../62../82.. lines is possible.
Actuators of the SKC32../62/82.. lines require a new stem coupling since the diameter of the new stem is only 10 mm. Stem couplings must be ordered as separate items (stock no. 4 178 5649 8).
If the valve to be replaced was driven by an actuator of the SKD31../61../81.., SKB31../61../81.. or SKC31../61../81.. lines, Siemens recommends to replace the actuator as well, the reason being the actuator’s age.
The tables below list former valve types and their successors. There is also an online replacement guide "Old2New" available; for access, go to www.siemens.com/hit under "Old2New replacement guide".