Masoneilan 535V Reducing and 535V-50 Differential Pressure Regulators Manual | 7
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Figure 3 - Type 535V Regulator
(Cv 0.60 for example)
Parts Reference
Ref.
Part Name
Ref. Part Name
Ref.
Part Name
l
2
Seat Ring Gasket
(1)
7
Packing Flange Stud
13
Body
3
Seat Ring
8a
Mounting Nut
16
Mounting Screw
3e
Seat Ring (Only on C
v
< 0.10
(2)
)
8b
Packing Flange Nut
27
Plug Stem Nut
3f
Spacer (Only on C
v
< 0.10
(2)
)
9
Packing Follower
l
182
Retaining Ring (Only on C
v
< 0.10
(2)
)
4
Seat Ring Retainer
10
Packing Flange
l
183
Plug-Stem (Only on C
v
< 0.10
(2)
)
5
Packing Spacer
11
Safety Pin
l
6
Packing
12
Plug-Stem
l
= Recommended spare parts
1. Non-existent on Cv 3.8.
2.
Complete sub-assembly includes: Plug-stem (183), Retaining ring (182), Seat ring (3e) and Spacer (3f). See Figure 2.
•
Insert the plug-stem (12 or 183) into the seat ring (3). For
a C
v
< 0.10, ensure that there is no binding during the
stroking of the plug. If binding occurs, loosen the retainer (4)
and replace the seat ring (3e) in the correct position until the
stem smoothly slides.
•
Slide spacer (5) aligning the hole in the spacer with the
safety pin (11) hole in the valve body.
Note:
For a Cv smaller than 0.10, ensure that the retaining
ring (182) is placed on the plug before engaging it in the
spacer (3f). If the retaining ring is damaged, replace it.
•
Wrap the safety pin (11) with two turns of PTFE tape
(Teflon). Screw it into the bonnet five and a half to six turns
from where threads engagement starts.
Note:
To find start of threads engagement, proceed as follows:
a.
Screw safety pin about one turn,
b. Pull safety pin outwards while unscrewing it.
•
