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Auto drain air filter is usually used to drain the water of the port where is lower, segregator, gas store pot and the bottom of gas filter. It is installed where it is not easy to drain the sewage with manpower, for example high, low or narrow place and especially where using large gas or drain water continually. It is can prevent the compressor air from re-polluting by water condensate. Drain automatically, no needs manual operation Dustproof; durable and reliable Standard parts are equipped with body case.

Specification：

Type	AD402-04	AD400-04
Proof pressure resistance	1.5Mpa(15.2kgf/cm2)
Extreme service pressure	1.0Mpa(10.2kgf/cm2)
Working pressure range	0.15-1.0Mpa	0.3-1.0Mpa
	(1.5-10.2kgf/cm2)	3-10.2kgf/cm2)
Environment and flow temperature	5～60℃
Pipe mouth(RcPT)	1/2	1/2
Drain mouth(RcPT)	3/8	1/2
Weight(kgf)	0.62	0.91
Manual switch	－

☆ Notice:
1.When install the drainpipe,please use the pipe whose inner diameter is more than 10mm,and the length should not exceed 5mm,and the pipe should not be bend upward
2.The compressor power should larger than 3.7kw.



Out line size diagram/structural diagram（mm）
Main parts:

Part No.	Name	Material
1	Body	Aluminum die casting

Parts list:

Parts No.	Name	Material	Model
			KAD402-04
2	Ｏring	NBR	JIS B2401P-8
3	Ｏring	NBR	113136
4	Net	SUS

☆ Working principle:
1) When there is no pressure in the cup
The floater (5)will go down,valve(9)colse the pore(6),pistion (8)is pressed down by spring(11),then the condensed water passed the drain hole(12).

2) When there is pressure
When the pressure is larger than 1kgf/cm2,then the piston (8) conquers the spring and push up ward,and the drain hole closed,the inner of cup is isolated from the ourside.

3) When there is condensed water in the cup
When the quantity of condensed water reaches to a certain degree,the floater (5)will rise,and pore(6)open,the pressure enter into the inner chamber,then the piston (8)is pressed down by pressure and spring(11),and the condensed water passed the discharge pipe (13)and drain.