4.4.
Mount gearbox to valve
4.4.1.
Overview on coupling variants
Design
Figure 10: Valve attachment via coupling
[1]
Bore with keyway
[2]
Square bore
[3]
Bore with two-flats
Application
●
For valve attachments according to EN ISO 5211
●
For rotating, non-rising valve stem
4.4.2.
Mount gearbox with coupling to valve
Unbored couplings or couplings with pilot bore must be machined to match the valve
shaft prior to mounting the gearbox to the valve (e.g. with bore and keyway, two-flat
or square bore).
Information
Assemble valve and gearbox in the same end position. As a standard, the gearbox
is supplied in end position CLOSED.
●
Recommended mounting position for butterfly valves: End position CLOSED.
●
Recommended mounting position for ball valves: End position OPEN.
Damage due to radial forces!
Risk of valve damage for applications requiring transmission of radial forces from
the valve shaft to the coupling.
→
In these cases, do NOT directly mount gearbox to valve but use torque reaction
lever as connection.
Assembly steps
1.
If required, move gearbox in same end position as valve using the handwheel.
2.
Clean mounting faces, thoroughly degrease surfaces.
3.
We recommend applying a surface sealing agent to the mounting faces.
4.
Use a corrosion protection agent for the valve shaft as well as for the inner and
outer parts of the coupling (recommendation: CorrosionX HD).
17
GS 315 – GS 500
GZ 30.1 – GZ 40.1
Assembly
