Depending on application th Varibell^® control element is available in differing versions:

a) Full Bell Typ:VG

This is the standard design. Most of the Varibell^® control valves are equipped with this bell. In this case the movement of the bell is comparable to a spherical valve. The pressure drop is effected in two steps. Inlet and outlet have the same shape. Equivalent flow in both directions is possible.

b) Special-Control Bells

For specific applicatons especially adapted control bells are available.

By very fine machining of control groove in connection with 2 - stage pressure reduction, smallest KV values of 0,0001 can be controlled with an excellent resolution.

For example:

• single stage control bell for Gas/solid application
• Bell of Siliciumcarbid SiSiC
• Control bell with two extremely different control ranges