Masoneilan 41005 Series Globe Valve Instruction Manual | 17
© 2015 General Electric Company. All rights reserved.
7. Actuator
For coupling operations of actuators on valves, it is
necessary as a preliminary:
• to position the plug (15) on its seat ring (13). (In no case,
one should not turn the plug on its seat, to avoid any
deterioration of tightness seat).
• connect a temporary air supply line to the actuator.
7.1 Coupling of Actuator Type 88 No. 6
(Figure 15)
A. Tightly screw the two hex nuts (1) onto the plug stem.
B. Push down the actuator and, at the same time, screw
on the yoke nut (33), then the bottom stem connector
(2). As soon as it becomes possible, insert the valve
stem into the actuator stem. The stem must be
inserted far enough so that when there is no air in
the actuator, the valve plug does not touch the seat.
C. Tighten the yoke nut.
D. Unscrew the valve plug stem until the valve plug
comes into contact with the seat. Do not turn the
valve plug on the seat as this could damage the
sealing surfaces.
E. Supply air to the actuator until the stem has travelled
at least 10 mm.
F. Unscrew the plug stem the number of turns N1
specified in Figure 13.
In the case of 41405 valves, use the N2 valve so ensure
tightness of the pilot plug.
G. Screw the 2 nuts (1) as far as they will go and check
that operation is correct.
H. Use the pointer (7) to set the travel scale (9) to the
closed valve position.
7.2 Coupling of Actuator Type 87 No. 6
(Figure 15)
A. Tightly screw the two hex nuts (1) onto the plug stem.
B. Push down the actuator and, at the same time, screw
on the yoke nut (33), then the bottom stem connector
(2). As soon as it becomes possible, insert the valve
stem into the actuator stem. The stem must be
inserted far enough so that, when there is air in the
actuator, the valve plug does not touch the seat.
C. Tighten the yoke nut.
D. Supply air to the actuator at the initial pressure of
spring range.
E. Use the pointer (7) to set the travel scale (9) to the
open valve position.
F. Supply the actuator with air at a high enough
pressure to obtain a travel equal to the nominal
travel of the valve.
In the case of the 41405 valves, reduce the travel by value
A indicated in Figure 14.
G. Unscrew the plug stem until the valve plug is in
contact with the seat. Do not turn the valve plug on
the seat as this could damage the sealing surfaces.
H. Screw the 2 nuts (1) as far as they will go and check
that operation is correct.
7.3 Coupling of Actuator Type 87
No. 10, 16 and 23
(Figure 15)
A. Tightly screw hex nut (1) onto the plug stem.
B. Screw the top stem connector assembly tightly onto
the actuator stem.
C. Push down the actuator and, at the same time, screw
on the yoke nut (33), then the bottom stem connector
assembly by screwing until they come into contact
with the hex nut (1).
D. Push down the actuator and tighten the yoke nut.
E. Supply the actuator with air at the initial pressure
indicated on the spring scale.
F. Position the stem connector assembly at distance “X”
indicated in Figure 12.
G. Use the pointer (7) to set the travel scale (9) to the
open valve position.
H. Supply the actuator with air at a high enough
pressure to obtain a travel equal to the nominal
travel of the valve
In the case of the 41405 valves, reduce the travel by value
A indicated in Figure 14.
