160GR Natural Gas Booster Instruction Manual
Mayekawa all rights reserved. Subject to change without notice. Lat revised in October 2007
p.6
b) Remove the guide pin from the case. When the current port is “K” or “L,” the guide pin is
located in the bottom area of the suction cover. When the current port is “M” or “K”, they
are located on the bottom of the rotor casing.
c) Turn the handle as many times as required to change to the desired Vi. When changing
to a higher Vi, turn the handle to the left. When changing to a lower Vi, turn the handle to
the left. For the number of rotations, refer to the
Graph 2.1
. Variable Vi valve can be
moved by turning the handle softly.
d) When changing the ports from the “K / L “ ports to the “M / H” ports, or vice versa, the plug
needs to be removed from the case and replaced with the Variable Vi valve fixing bolts.
e) On the “K” and “L” ports, the Variable Vi support guide pin should be attached to the
bottom of the suction cover. The plug should be attached to the bottom of the rotor
casing.
On the “M” and “H” ports, contrarily, the Variable Vi support guide pin should be attached
to the bottom of the rotor casing. The plug should be attached to the bottom of the suction
cover.
f) After moving the variable Vi slide valve, put the Vi guide pin into the case and lock them
with the hexagon socket head cap screws. With the Variable Vi support guide pin, use the
dice studs for the seal.
When the Vi guide pin feels heavy or caught by something, it should not be forced into the
holes. When this happens, it’s most likely that the position of the holes of the variable Vi
valve and that of the variable Vi valve fixing pin are not aligned. Slightly turn the handle to
the right or the left to find the position where the pin can be inserted smoothly.
g) When the variable Guide pin is smoothly inserted all the way, lock them by a proper
torque. Pun the dice stud for the seal in, and lock them in a different position from the
Variable Guide pin.
[CAUTION]
Head sizes of the variable Vi fixing bolts and the plug are not the same to avoid mistakes.
From the K port
K
Port
⇒
L Port
K Port
⇒
M Port
K port
⇒
H Port
Moving Distance
(mm)
21 50.5 72
Number of Rotations
of Handle
3-1/2 8-3/8 12
Direction of Rotations
Counter-clockwise
Counter-clockwise
Counter-clockwise
Position of fixing pin
Suction Cover
Rotor Casing
Rotor Casing
From the L Port
L
Port
⇒
K Port
L Port
⇒
M Port
L Port
⇒
H Port
Moving Distance
(mm)
21 29.5 51
