Masoneilan VariPak Adjustable Cv Control Valves Instruction Manual
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Figure 20 - Plug stem pre-adjustment for
VariPak 28002 adjustable-Cv
Reassembly procedure for the VariPak 28001 single-
lever valve (continued):
H. Couple lever (113) to actuator bracket (108) using pin
(105) and the 2 retainer clips (112a). Ensure that the
holes in lever (113) where spring clamp (115) is fitted
is located above.
Note: Check that the clevis (104a) is correctly positioned
before fitting the lever (113) on the actuator support
(108).
To identify the position of the lever connecting holes and
the spring clamp (115) attachment hole, with respect to
the required action, see figure 6.
I. Couple clevis (104a) to lever (113). To do this, press the
end of the plug stem with a screwdriver until the holes
in the clevis and lever are aligned. Couple using the
pin (18) and retainer clips (112b).
Note: Slightly grease all pins before fitting. Perform the
adjustment operation described in "Calibration", section
4.2.1, page 12.
J. If piston rod clevis (104b) has not been disturbed
during disassembly, couple it to the end of lever (113)
by admitting air pressure to the actuator to drive
clevis (104b) upwards. Couple the clevis to lever (113)
using pin (124) and two retainer clips (112c).
Note: If the clevis (104b) has been disturbed, proceed
with adjustment and coupling as described in
"Calibration", section 4.1.1, page 12.
K. Release the pressure from the actuator and check
tightness again (see "Calibration", section 4.2.1, page
12). Then continue from step M. of the VariPak 28002
procedure.
Reassembly procedure for the VariPak 28002
adjustable-Cv valve (continued):
H. Couple lever No. 2 (22) to the actuator bracket (108)
using pin (18). Ensure that the hole in lever No. 2
where spring clamp (115) is fitted is located above
and in line with balance spring (114).
I. Fit adjustment pin (23) in the slide of lever No. 1 and
screw adjustment knob (24) on its threaded end. Insert
the smooth end of pin (23) into the groove in lever
No. 2 and place lever No. 1 on support bracket (108).
Couple lever No. 1 to actuator bracket (108) using pin
(105) and two retainer clips (112a).
Note: Check that the clevis (104a) is correctly positioned
before fitting lever No. 1 on the actuator support (108)
To identify the position of the connecting holes of levers
No. 1 and 2 with respect to the required action, see
figure 6.
J. Set adjustment knob (24) to the minimum Cv position.
K. If piston rod clevis (104b) has not been disturbed
during disassembly, couple it to the end of lever No. 2
using pin (124) and two retainer clips (112c).
Note: This operation will be simplified by applying air
pressure to the diaphragm (136) to set the piston rod to
an intermediate position, and by setting the adjustment
knob to a position where lever No. 2 is most accessible.
If the clevis (104b) has been disturbed, proceed with
adjustment and coupling as described in "Calibration",
section 4.1.1, page 12.
L. Couple clevis (104a) to lever No. 1. To do this, press
the end of the plug stem with a screwdriver until the
holes in the clevis and lever No. 1 are aligned. Couple
using the two pins (184) and retainer clips (112b).
Note: The clips are inserted on the pins between the
sides of the clevis and lever No. 1.
M. Fully unscrew take-up screw (116) from spring clamp
(115), then fit clamp, after hooking balance spring
(114) first to the positioner spring bracket of the
diaphragm S/A (152), and then to spring clamp (115).
Note: The spring clamp (115) has two holes. If an Air-to-
Open actuator is used, the spring must be hooked to the
top hole. If an Air-to-Close actuator is used, the spring
must be hooked to the bottom hole (see figure 6).
