Drehmo D 30 - End Stops in Part-Turn Actuator

Valve attachment
17
Increased fastening torque for powder coated flanges possibly required!
a) Thanks to powder coating on flange surfaces and flange threads, we achieve top
quality and permanent corrosion protection. However, increased fastening torque
of up to 2 Nm across all screw dimensions might be required. Consequently, tools
might already be required when fasting the screws (typically a socket is suffi-
cient). This was considered when specifying the screw connection and is totally
uncritical in practice.
How to proceed 1. Operate actuator with handwheel to mechanical end stop.
2. Thoroughly degrease the bearing faces of the output mounting flanges and apply
a suitable sealing agent (e.g. Marston Durapress).
3. Apply a small quantity of grease to the valve shaft [2].
4. Place coupling [1] onto valve shaft [2] and secure against axial slipping by using a
grub screw [3], a retaining ring or a screw [4]. Heed dimensions X, Y or Z (refer to
Assembly [}16]).
5. Apply acid-free grease to splines on coupling.
6. Fit part-turn actuator.
7. Should the flange bores not match with the threads:
ð Slightly rotate handwheel until bores line up.
ð If required, shift actuator by one tooth on the coupling.
8. Fasten actuator with suitable screws.
We recommend glueing in the screws using thread sealing agent. Tighten screws
crosswise with torque according to Assembly [}16].
Table4: Coupling fitting dimensions
Type, size, output mounting
flange
X
max
in mm Y
max
in mm Z
max
in mm
DP…(R)75/150/299-F05/07 3 2 40
DP…(R)75/150/299-F10 3 2 66
DP…(R)300/450-F10 4 5 50
DP…(R)300/450-F12 4 5 82
DP…(R)600/900-F12 5 10 62
DP…(R)600/900-F14 5 10 102
DP…(R)1200/1800-F14 8 10 77
DP…(R)1200/1800-F16 8 10 127
Indirect mounting For indirect mounting, DREHMO actuators can be supplied with base and lever or
base and shaft. Connection between actuator and valve is provided by the customer
(e.g. via lever arrangement).
4.7
End stops in part-turn actuator
The internal end stops limit the swing angle. They protect the valve in manual opera-
tion. End stop setting is generally performed by the valve manufacturer prior to in-
stalling the valve into the pipework.
CAUTION!Exposed, rotating parts (discs/balls) at the valve
Caution: The end stop setting sequence depends on the valve: We recommend start-
ing with end stop CLOSED for butterfly valves and with end stop OPEN for ball valves.
On delivery, unfasten both screws for the end stop to allow alignment of actuator to
valve. The minimum and maximum dimensions indicated in the table below must not
be exceeded. When setting up the actuator, the valve must be in position CLOSED.
Table5: Setting limits of the stop screws for planetary gearings
Actuator type 90° T T
min
DP…(R)75/150/299 (Ex) 17mm 11mm
DP…(R)300/450 (Ex) 20mm 12mm