Technical Specifications

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Masoneilan 36005 Series High Capacity Control Ball Valves | 15
Do not rotate handwheel prior to replacing
pivot pins (72) into the handwheel mounting
bracket (62)�
D. Install assembly into handwheel mounting bracket (62)
and replace pivot pins (72).
E. Connect handwheel shaft S/A (55) to handwheel (54)
and to the lever arm with pin (66) and replace clip (63).
3�5�2 Handwheel Subassembly – Model 33, Size AC�
Refer to section 3�5�1 for sizes B & C� Refer to Figures
13, 14 & 16�
3�5�2�1 Disassembly
Turn handwheel to disengage position before
proceeding with handwheel maintenance�
A. Remove retaining ring (54-7) and shaft washer (54-4).
B. Rotate Handwheel (54) counterclockwise until it is
removed from housing (31).
C. Clean ACME threads on handwheel shaft (54-3) and
grease with Molykote G.
3�5�2�2 Reassembly� Refer to Figures 13, 14 & 16�
A. Thread handwheel assembly (54) into housing (31) until
it extends through the housing and the groove in the
stem (54-3) is visible.
B. Place shaft washer (54-4) over stem (54-3).
C. Install retaining ring (54-7) into groove on stem (54-3).
3�6 Diaphragm Replacement
Spring diaphragm actuators contain large
forces due to their preloaded powerful springs�
Failure to carefully follow this procedure can
result in personal injury!�
3�6�1 Model 33 sizes B & C only� Refer to section
3�6�1�1 Disassembly
A. Relieve actuator pressure and disconnect air supply. Do
not remove pivot pin (39).
B. Verify that all three tension bolts (95) and nuts (96) are
in place and secure.
C. Remove nuts (87) and cap screws (86) following a criss-
cross pattern.
D. Verify actuator stem (77) and rod end (94) are securely
connected to lever (32) through pivot pin (39) and that
retaining clips (40) are in place.
E. Loosen tension nuts (96) evenly in sequence. Do
not exceed three turns of any one nut (96) before
proceeding to the next one. Do not vary the sequence.
Failure to evenly unload tension nuts may
result in personal injury!
F. Continue loosening tension nuts (96) until further
loosening of the tension nuts (96) is no longer
accompanied by an increase in separation of the upper
diaphragm case (84) from the lower case (91). At this
point the tension nuts (96), bolts (95) and warning plates
(97) can be removed.
G. Remove the upper diaphragm case (84) and diaphragm
(85).
The diaphragm plate (88) remains under spring
load�
3�6�1�2 Reassembly
A. Ensure that sealing surfaces of diaphragm cases (84)
and (91) are clean and free of any dirt or debris. Check
that there are no foreign objects that may interfere
with travel or damage diaphragm.
B. Install diaphragm (85) on diaphragm plate (88). Align
bolt holes with holes in lower case (91).
C. Install three tension bolts (95) with warning plates (97)
into upper case (84). Ensure bolts are equally spaced at
120° to each other.
D. Mount upper case (84) onto diaphragm plate (88) such
that the tension bolts pass through holes in diaphragm
(85) and lower case (91).
E. Install tension nuts (96) finger tight onto tension bolts
(95).
F. Tighten each tension nut (96) three turns before
proceeding to the next to ensure actuator spring (90)
is evenly loaded. Continue until the diaphragm is firmly
sandwiched between the flanges of the upper and
lower diaphragm cases. Torque tighten tension bolts to
50 in. lbs.
CAUTION
CAUTION
WARNING
DANGER
CAUTION
CAUTION
WARNING
DANGER
CAUTION
CAUTION
WARNING
DANGER
CAUTION
CAUTION
WARNING
DANGER
CAUTION
CAUTION
WARNING
DANGER