Masoneilan 21000 Series Top Guided Globe Valve Instruction Manual | 21
Copyright 2023 Baker Hughes Company. All rights reserved.
Connecting Type 88 (Air to Retract) No. 10, 16 and 23
Actuator (Figure 23)
1. Supply the actuator with air to retract stem.
2. Unscrew the top stem connector (4) in accordance with
dimension “X” in Table 6.
3. Tightly assemble hex nut (1) onto the plug stem.
4. Tightly screw the top stem connector (4) assembly onto the
actuator stem (10).
5. Push down the actuator, and screw on the yoke nut (33) at
the same time. Then assemble the bottom stem connector
(2) assembly by screwing until it comes into contact with the
hex nut (1).
6. Push down the actuator and tighten the yoke nut (33).
7. With the plug correctly positioned on the seat, unscrew the
bottom stem connector (2) assembly to bring it into contact
with the top stem connector (4).
8. Supply air to the actuator until the stem has travelled at least
0.40 inches (10 mm).
9. Unscrew the top stem connector (4) by the number of turns
N1 specified in Table 5 then lock manually with hex nut (1).
10. Release the pressure in the actuator. Use pointer (7) to set
the travel scale (9) to the actuator supply pressure so that
the two stem connectors come into contact. Then tighten the
socket head cap screws (5), hex nut (1), and lock nut (32).
11. Shut off the closed valve pressure and check that operation
is correct.
Actuator
Size
Travel
“X”
Actuator 87
“X”
Actuator 88
in
mm
in
mm
in
mm
10
0.8
20
5.12
130.0
4.62
117.3
10
1.5
38
5.44
138.2
16
0.8
20
8.00
203.2
7.02
178.3
16
1.5
38
8.50
228.6
16
2.0
51
9.28
235.7
16
2.5
63.5
9.50
241.3
23
0.8
20
8.25
209.5
23
1.5
38
8.62
218.9
23
2.0
51
9.12
231.6
23
2.5
63.5
9.59
243.6
Table 6 - Position of Top Stem Connector
Parts Reference For Spring Diaphragm Actuators - Type
87/88 Multispring
Item No.
Description
1
Hex Nut
2
Stem Connector, Bottom
3
Cap Screw, Hex Head
4
(1)
Stem Connector, Top
5
(1)
Cap Screw, Socket Head
6
(1)
Connector Insert
7
Pointer
8
Screw, Pan Head
9
Scale, Travel
10
Actuator Stem
31
Yoke, Machining
32
(1)
Lock Nut
33
Yoke Nut
1. Not provided for Size 6 Actuator
Table 7 - 87/88 Actuator Parts List
