Specifications

q Body
w O-ring
e Gauze
Valve o
u Lever
q Body
w O-ring
i Piston assembly
!1 Spring
i Piston
r O-ring
Chamber y
Float t
Bowl !0
Long hole !2
of chamber
Drain guide !3
Drain
Drain
Construction/Dimensions
AD402 AD600
Component Parts
No.
1
Description
Body
Material
Aluminum die-casted
Replacement Parts
No.
2
Description
Model
113136
20062
AD34PA
—
AD402
JIS B2401G-100
—
—
20025A
AD600
Material
NBR
Stainless steel
—
—
O-ring
3
Note 1)
8
Gauze
Internal assembly
Piston assembly
Note 1) Internal assembly: Assembly for parts r to !2 except !0.
Note 2) Part no. for bowl assembly: AD34
Note 3) Part no. for bowl !0: 201016
Working Principle (AD402)
• When no pressure is applied inside the bowl !0, float t descends of
its own weight and valve o closes the chamber y hole. Piston i is
pushed down by spring !1, and drain passes through the chamber’s
long hole !2 to enter the housing and is discharged.
• When pressure is applied inside the bowl:
When pressure is 0.1 MPa or more, it overcomes the force of spring
!1, allowing the piston i to ascend, and comes in contact with O-ring
r. Thus, the inside of the bowl !0 is isolated from the outside.
• When drain has accumulated:
Float t ascends due to flotation and opens the chamber hole y,
allowing the pressure to enter the chamber y. Piston i descends due
to internal pressure and the force of spring !1, and the accumulated
drain is discharged through drain guide !3.
74
Related Products: Auto Drain Valve Series AD402/600
!4 Valve
assembly