5. Operation
5-1. Adjusting the opening of the valve for initial pumping
Adjust the initial pumping amount with no air pressure to the pilot port S before using. Initial flow
is reduced by turning the adjustment nut clockwise. It is increased by turning it counterclockwise.
The location where the nut gently stops during rotation clockwise and counterclockwise indicates
the initial flow zero and the maximum flow. If the nut is rotated too much, it may damage the nut.
The adjustment nut shall be operated by hand. Do not use any tool. If the rotation of the
adjustment nut feels heavy, please refer to the following items.
The adjustment nut is fully closed when the completed product is shipped. The nut is fully open
when the bonnet assembly (maintenance part) is shipped. Use caution.
5-2. Fixing adjustment nuts
The adjustment nut does not rotate during the operation of the valve. It can be fixed to prevent
incorrect operation, if required. If the adjustment nut is fixed after adjusting the initial flow,
tighten the adjustment nut set screw to the tightening torque shown in the table below. When
loosening the set screw, loosen until it stops gently. Do not remove the adjustment nut set screw.
The adjustment nut is not fixed when the product is shipped. If the rotation of the adjustment nut
feels heavy, loosen the adjustment nut set screw.
5-3. Opening the valve (s valve) for initial pumping
When the air pressure is applied to the pilot port S, the S valve will release from the S valve seal
assembly and open to the adjusted opening.
5-4. Opening the valve (valve M) for main pumping
When the air pressure is applied to the pilot port M, the valve will release from the body seat
and fully open. It operates even when air pressure is not applied to the pilot port S.
5-5. Closing the valve for initial pumping and main pumping
When the air pressure is released from the pilot port S and M, S and M valve will return and start
sealing.
Adjustment nut tightening torque
Model
XLD-25
XLD-40
XLD-50
XLD-63
XLD-80
XLD-100
XLD-160
Tightening torque
0.08 N
・
m
or less
0.3 N
・
m
or less
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XL*****-OMI0011-E
