Baker Hughes Masoneilan 41005 Series, Instruction Manual

Page: 16 / 52

16 |
Baker Hughes
© 2023 Baker Hughes Company. All rights reserved.
6.2 Assembly of Ring or
Spring-Energized Seal Ring
6.2.1 41305 valve
(Figures 5, 17 and 20)
These valves have a spring-energized seal rings composed
of a PTFE-based jacket maintained expanding by a spring.
To insert the ring into the plug groove:
• Lubricate the entry chamber.
• Place the ring over the conical top of the plug so that the
lips of the ring face to the pressure (see Figure 5).
To the assembly direction of the radial ring (11F)
on the plug (see Figure 5). Flow Tends to Open:
the open side is in the top. Flow Tends to Close:
the open side is in the lower part.
• Slip to the ring into the groove (without spinning it) as
shown in Figure 5. This operation can be facilitated by
heating the ring. The temperature of the ring should not
exceed 150°C.
• Keep the ring retained until it returns to room temperature
and goes back in place within the groove. Clamping with
a collar (SERFLEX type) will help to properly position the
ring.
Pushing
Direction
FTO FTC
Pushing
Direction
Figure 5 - Spring Energized Seal Ring
6.2.2 41405 and 41505 and 41705 Valves
(Figures 17 and 19)
These valves are equipped with metal rings; the inner ring has
a straight cut while the outer ring has a staggered cut.
To insert the rings into the cage groove, open the rings
slightly by hand and slide them, one after the other, along the
plug making sure that the parts are not damage.
Note: The cuts in the outer and inner rings are to be
placed at about 180° from each other.
6.2.3 41605 Valve (Figure 20)
These valves are equipped with an inner elastomeric ring
Shouldered
stem
Shouldered stem
Two flats of wrench size “E”
Plug shank
Standard stem
Dia. C Stem pin
F
D
X
B
B
A
X
Standard
stem
Table 1 - Valve Plug Reference Marking
Valve
plug stem
diameter B
Diameter A
Metric pin,
diameter
C
Anglo-
Saxon
pin dia.
C
F D
Distance
X
E
Torque T
Non-
Shouldered
stem
Shouldered
stem
mm (in.) mm (in.) mm In. mm (in.) mm (in.) mm (in.) mm (in.) N.m (Ft.lbs) N.m (Ft.lbs)
12.7 (1/2) 20 (.79) 3.5 0.14 18 (.70) 18.5 (.73) 6 (.24) 17 (11/16) 50 (37) 60 (44)
15.87 (5/8) 25.5 (.98) 5.0 0.2 24 (.95) 28 (1.1) 8 (.30) 22 (7/8) 50 (37) 160 (118)
19.05 (3/4) 35 (1.38) 5.0 0.2 30 (1.2) 45 (1.77) 19 (.75) 27 (11/16) 160 (118) 160 (118)
25.4 (1.0) 44.5 (1.66) 8.0 5/16 40 (1.58) 47.5 (1.88) 25 (.98) 30 (11/4) 160 (118) 250 (184)
31.75 (1 1/4) 58 (2.28) 8.0 5/16 55 (2.20) 70 (2.76) 31.5 (1.24) 40 (1 5/8) - 800 (590)
38.1 (1 1/2) 70 (2.76) 10.0 - 65 (2.56) 90 (3.54) 33 (1.30) 50 (2) - 1 500 (1100)
Figure 4 - Plug Stem Marking