FJ400062B1
Created on 2021/12/20
- 2 -
1. Features
Model 2420 is a rotary needle valve that can easily adjust the opening and closing
operation of gas or liquid.
A feature of MODEL 2420 is that it is a greaseless needle valve.
2. Installation and Piping
For installation on a panel, remove one mounting nut and insert the needle valve
through the mounting hole (
15) from the backside of the panel to the face and then
secure the valve with the nut from the face of the panel.
The knob is for exclusive use of this Model 2420, and it is an insertion type.
In case the knob is slightly hard when pulling out the knob, turn the needle fully
open to make it easier to pull out. (At the time of shipment, the knob is set at a
position where it can be easily pulled out, about 2 times back from fully open side.)
When attaching the knob to the shaft, align the knob protrusion with the flat end of
the shaft and insert as shown below.
3. How to use
3-1 Control of Flow
Turn the knob of the needle valve to control the flow. Turning it counterclockwise
(OPEN) will increase the flow and clockwise (CLOSE) will decrease the flow.
3-2 Precautions
1)
When storing the needle valve at your premises, installing it in a line, removing it
from a line or test running it for adjustment after installing it in a line, exercise
care to protect its IN and OUT from oily substances and contaminants. They are
a cause of performance degradation or control failure.
2)
Zero stop of Model 2420 is not a function guaranteed.
Never turn the knob by undue force to effect zero stop.
Otherwise, the needle part will be broken to disable flow control. If zero stop is
required, be sure to install a stop valve before the needle valve.
[Actual Spec. of Zero stop at 0.1MPa AIR]
（
Typical value
）
Needle No.
N1
～
N4
：
Within about 20mL / min
Needle No.
N5
：
Within about 2L / min
