MP953A,B,C,D PNEUMATIC ACTUATORS
EN0B-0552GE51 R1210
3
stem-locking slide
stem button
Fig. 3. Stem-locking slide
Table 5. Dimensions Y, in mm
actuator size
5", 7" 8" 13"
valve size
valve series
DN
15…80 Y
1
DN
15…80 Y
2
DN
100…150 Y
3
action
to open
V5016A
V5025A
V5328A
89 133 190 ↑
V5011R,S 89 133 -- ↑
V5013R,E 107 151 --
V5015A -- --
V5050A
227
V5329A,C
107 151
--
↓
valve size
valve series
DN
15…65
DN
15…65
DN
80…100
action
to open
V5049A 89 133 190 ↑
Mounting the MP953B,D
1. Pull the valve stem up.
2. Attach the stem connector screw to stem button (Fig. 4).
3. Place the actuator on the valve without pushing the stem
down.
stem button connector
clearance “B”
(measured when
spring is
compressed)
clearance “A”
set screw
Fig. 4. Attaching the stem connector screw
4. Turn the stem connector screw by its screw-slot
counterclockwise to back out the stem button until the
actuator is in contact with the shoulder of the stem button.
5. Push the actuator onto the valve bonnet and hold it firmly
in place; tighten the two set screws
6. Load the stem by turning the stem connector screw
clockwise by its screw slot.
a) On a straight-through valve (position 1), turn the stem
connector screw until a clearance A of approx. 3 mm
(1/8") exists between the spring and the actuator
spider.
b) On a three-way valve, a clearance A and B of approx.
1.5 mm each is required at both ends of the stroke to
permit proper close-off. If there is no air on the
actuator, adjust the A clearance approx. 1.5 mm and
recheck the B clearance when air is available.
7. If clearances A and B cannot be adjusted following the
procedure outlined above, check the stem height "y" and
adjust, if necessary.
Y1
Y2
Y3
without stem
extension for
MP953A,C 5”
MP953B,D7”
with stem
extension for
MP953A,C 8”
with stem
extension for
MP953A,C 13”
Fig. 5. Stem extensions
ADJUSTMENTS
NOTE: Adjustments are necessary only for the
GRADUTROL-Relay used with the MP953A, B.
The range is adjusted using six adjustment screws (see also
Fig. 6). Note label on body of GRADUTROL-Relay. All
devices are factory-set for 35 kPa range. This point is ad-
justed by turning the adjustment knob. The graduations of the
external calibration scale on the knob present various values
within the different ranges. All devices are factory-set for
35 kPa start point. After completing the adjustment pro-
cedure, do not change the position of GRADUTROL-Relay
(with respect to the actuator).
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