Spec Sheet

ManualsBrandsSMC ManualsAir-Compressor Accessories1/2" Float-Type Automatic Tank Drain Valve (22 To 145 PSI)

Warning Warning

Construction/Dimensions

AD402

Component Parts

Replacement Parts

Model/Specifications

Drainage is automatically

discharged in a reliable

manner, without requiring

human operators.

Highly resistant to dust and corro-

sion, operates reliably, and a bowl

guard is provided as standard

equipment.

Option Specifications

1. Use auto-drain under the following

operating conditions, or it will lead to

malfunctions.

To connect a drain discharge pipe, use

a pipe with a minimum bore of ø10, and

a maximum length of 5 m. Avoid using a

riser pipe.

AD600

•Working principle (AD402)

When no pressure is applied internally to bowl !0, float t descends of

its own weight and valve o closes chamber hole y. Piston i is

pushed down by spring !1, and the drainage passes through the

chamber’s elongated hole !2 to enter the housing and is discharged.

• When pressure is applied internally to the bowl:

When pressure is larger than 1 MPa, it overcomes the force of spring

!1, allowing piston i to ascend, and comes in contact with O-ring r.

Thus, the inside of bowl !0 is isolated from the outside.

• When drainage has accumulated:

Float t ascends due to flotation and opens the chamber

s hole y,

allowing the pressure to enter chamber y. Piston i descends due to

the force of the internal pressure and spring !1, and the accumulated

drainage is discharged through drain guide !3.

No.

Description

Body

Material

Aluminum die-casted

No.

Description

113136

20062

AD34PA

—

Model

AD402

JIS B 2401G-100

—

20025A

AD600

Material

NBR

Stainless steel

—

O-ring

(1)

Gauze

Internal assembly

Piston assembly

201037P —

—

Valve 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

AD402

AD600

Proof pressure

Max. operating pressure

Operating pressure range

Note)

Ambient and fluid temperature

Port size

Drain discharge port size

Weight (g)

Model

1.5 MPa

1.0 MPa

0.1 to 1.0 MPa

620

–5 to 60°C (No freezing)

Rc , ,

1.5 MPa

AD402 AD600

Note) Use for air compressor with flow larger than 400 l/min (ANR).

1.0 MPa

0.3 to 1.0 MPa

2100

–5 to 60°C (No freezing)

Metal bowl AD402- -2

Summary of content (5 pages)

PAGE 1
Related Products: Auto Drain Valve AD402/600 Model/Specifications Drainage is automatically discharged in a reliable manner, without requiring human operators. Highly resistant to dust and corrosion, operates reliably, and a bowl guard is provided as standard equipment. AD402 1.5 MPa 1.0 MPa 0.1 to 1.0 MPa –5 to 60°C (No freezing) Rc 1 4, 3 8, 1 2 Model Proof pressure Max.
PAGE 2
A I R P R E PA R AT I O N AUTO DRAINS 5.27 A U T O D R A I N S E R I E S (N)AD P o r t S i z e s 1⁄ 4 ~ 1 F l o a t Ty p e A u t o m a t i c D r a i n Va l v e TECHNICAL SPECIFICATIONS Type Operating Pressure (N)AD402 (N)AD600 1.5~9.9 Bar 3~9.9 Bar 22~145PSI 45~145PSI Max Supply Pressure 15 Bar / 220PSI Max Operating Pressure 9.
PAGE 3
A I R P R E PA R AT I O N AUTO DRAINS 5.29 DIMENSIONS M6 Hex Cap Bolt (applicable hex. wrench normal size 5) M6 Hex Cap Bolt (applicable hex. wrench normal size 5) Pilot Exhaust Port (both sides) Label Bleed Valve Bracket Mounting Hole (both sides) Flushing Button Bracket (Option) Drain Inlet 1⁄2 Female Thread See “How To Order” for type of thread.
PAGE 4
Safety Instructions These safety instructions are intended to prevent a hazardous situation and/or equipment damage. These instructions indicate the level of potential hazard by labels of "Caution", "Warning" or "Danger". To ensure safety, be sure to observe ISO 4414 Note 1), JIS B 8370 Note 2) and other safety practices. Caution : Operator error could result in injury or equipment damage. Warning : Operator error could result in serious injury or loss of life.
PAGE 5
Common Precautions Be sure to read before handling. For detailed precautions on every series, refer to main text. Selection Warning 1. Confirm the specifications. Products represented in this catalog are designed for use in compressed air appllications only (including vacuum), unless otherwise indicated. Do not use the product outside their design parameters. Please contact SMC when using the products in applications other than compressed air (including vacuum). Mounting Warning 1.