Technical Specifications

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Masoneilan 36005 Series High Capacity Control Ball Valves | 11
A. Clean the contact surfaces of the ball plug (2) with
alcohol or other suitable degreaser to facilitate
application of the dry graphite spray lubricant. If
necessary, very mild abrasive pads such as Scotch-
Brite™ may be used to remove any oxide layers on the
ball plug (2).
B. Apply the dry graphite lubricant spray (Dow- Corning
321
®
) in several light coats on the plated seal contact
surfaces of the ball plug (2). Allow the graphite spray to
dry fully – which will produce a dull gray finish on the
coated parts.
C. Move ball to the closed position.
D. Replace downstream back-up ring (32), seal assembly,
gasket (4) and retainer (3). Take care that beveled edge
flexible metal seal (8) and backup rings (6 & 32) are
facing the ball.
E. Replace set screws (9) and washers (10) and tighten.
3�3�4 Seal Ring – Heavy Duty Metal Seal
3�3�4�1 Disassembly
Note: Seal ring removal, inspection and reinstallation
must be done with the valve removed from the
pipeline.
A. Remove screws (9) and washers (10).
Note: The Heavy Duty Metal Seal assembly consists of
a seal ring (8), radial seal (30) and wave spring (31).
B. Note the orientation of the radial seal (30) and wave
washer (31) for reassembly.
C. Clean parts of any residue that remains from the
process. Take care not to damage or mark the sealing
surfaces of seal ring (8) or radial seal (30).
3�3�4�2 Reassembly
Note: If retrofitting a valve originally equipped with an
MN-7 seal ring follow steps A through D. If valve was
originally supplied with a metal seal, please proceed to
step C.
A. Clean the contact surfaces of the ball plug (2) with
alcohol or other suitable degreaser to facilitate
application of the dry graphite spray lubricant. If
necessary, very mild abrasive pads such as Scotch-
Brite™ may be used to remove any oxide layers on the
ball plug (2).
B. Apply the dry graphite lubricant spray (Dow- Corning
321
®
) in several light coats on the plated seal contact
surfaces of the ball plug (2). Allow the graphite spray to
dry fully – which will produce a dull gray finish on the
coated parts.
C. Move ball to the closed position
D. Lubricate the Radial Seal (30) with Dow-Corning 111
®
Silicon grease (or equivalent) and install it over the end
of the Heavy Duty Seal Ring (8).
Note: The open lips of the radial seal (30) must face
AWAY from the seat bevel and ball.
E. Install the Wave Spring (31) over the end of the Heavy
Duty Seal Ring (8).
F. Insert the Seat Retainer (3) over the end of the Seat (8)
and apply even pressure to overcome the resistance
of the radial seal (30) until the wave spring (31) is
compressed.
G. Install the retainer/body gasket (4).
H. Install the seat (8), retainer (3), radial seal (101) and
wave spring (102) assembly into the body counterbore
until contact is made with the ball plug (2).
I. Install retainer screws (9) and washers (1) and tighten to
secure the retainer and seal assembly in the body.
3�3�5 Ball Plug
3�3�5�1 Ball Plug Disassembly
A. Remove bracket (see section 3.3.2).
B. Remove screws (9) and washers (10). Slide the retainer
(3) out of the valve body. Remove seal assembly (refer to
Para. 3.2.2.1 Seal Ring - Disassembly).
C. Remove safety pin (27). Remove the shaft (5) from the
valve body. The packing (19), packing adaptor (28) and
packing follower (20) will slide out with the shaft. If the
shaft will not move, thread nuts (24) on the packing
studs, then place the packing flange (23) on top of the
nuts. Slide the lever (32) onto the shaft (5) up against
the packing flange (23) and tighten screw (34). By
unscrewing the packing nuts (24) evenly, ample force
is developed to move the shaft (5). Once shaft has
been started, it should be possible to remove the shaft
completely. If not, a suitable size bolt screwed into the
tapped hole on the shaft end can be used as a shaft
“puller”.
D. Remove nuts (13), end flange (14), pin shaft (11) and
gasket (15). If the pin shaft will not move, push it out
with a rod inserted through the bonnet end of the
valve.
E. Remove the ball (2) and separate the lower bushing
(16) from it. Remove the upper bushing (17). If it sticks,
the upper bushing (17) can be pushed out with a rod of
suitable size inserted into the pin shaft end of the body.
F. Examine all parts for damage due to erosion, corrosion,
or wear. Replace the seal ring if damaged, worn or
distorted. Replace all defective parts and all packing
and gaskets. Clean the valve parts thoroughly before
reassembly. Remove gasket (4) and (15) residue from