FJ400062B1
Created on 2021/12/20
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3)
Model 2420 is equipped with a packing for fixing the shaft to the needle shaft. In
order to maintain this shaft anti-shake function, do not forcibly rotate in the
opening direction beyond the contact position when the valve is fully opened.
4)
Practical evaluation is recommended for low flow rate.
Model 2412 series is most suitable for high precision flow rate adjustment.
Please be careful when the reference flow rate is as follows;
Gas: 1L/min or less, Liquid: 50mL/min or less
5)
If you turning the hexagon nuts of the inlet-side connection counterclockwise
strongly, the fitting screw of the hexagon nuts will loosen from the main body
block, and it may cause external leakage.
Your attention is required when removing the installed joints. Please fix this
hexagon nuts with a wrench and be careful not to apply a load to the body when
removing the joint.
Should the needle part is loosen, tighten it to the body with a torque of 4 N·m.
6)
This product is assembled with oil-free specifications without using any greases.
However, it is not a particle-free product because it is not assembled in a clean
room. Therefore, when using the product with strict prevention of contamination,
such as at food production lines, we recommend that you clean and purge the
inside of this product before installation.
No grease or lubricating oil is used for the rotating screw also. Therefore, if the
rotation is repeated continuously, heat is generated in the screw part, and the
rotation gradually becomes harder. If the rotation is continued, the screw part
may seize and the flow rate may not be adjusted. There is no problem with minute
adjustment, but please note that continuous use of large rotations is not
recommended.
If you change the purge setting repeatedly, such as flow closed, flow control or full
open, please select MODEL2412 or MODEL2400.
