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stem-locking slide
stem button
Fig. 3. Stem-locking slide
Table 5. Dimensions Y, in mm
5", 7"
valve size
DN
valve series
15...80 Y
1
V5016A
V5025A
89
V5328A
V5011R,S
89
V5013R,E
107
V5015A
--
V5050A
107
V5329A,C
valve size
DN
valve series
15...65
V5049A
89
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"
Fig. 4. Attaching the stem connector screw
actuator size
8"
13"
DN
DN
15...80 Y
100...150 Y
2
3
133
190
133
--
151
--
--
227
151
--
DN
DN
15...65
80...100
133
190
set 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.
action
to open
↑
↑
↓
without stem
extension for
MP953A,C 5"
action
MP953B,D7"
to open
↑
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).
3
MP953A,B,C,D PNEUMATIC ACTUATORS
with stem
extension for
MP953A,C 8"
MP953A,C 13"
Fig. 5. Stem extensions
EN0B-0552GE51 R1210
with stem
extension for
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