VIDEO:
30 SECOND
PART BUILDER
EXPLAINED
AD402-A, Auto Drain Valve
The AD402-A is the improved version of SMC's proven AD402 auto drain design. These enhancements include an improved resistance to foreign matter, increased discharge rate and reduced weight.
- Improved environmental resistance with transparent bowl guard
- 360° visibility of bowl contents
- Reduced maintenance space and easier maintenance
- Now with three bowl material choices: polycarbonate, nylon (new), aluminum
- Top and side entry types available
How to order
3
Auto Drain Valve
AD402-A Series
Model
AD402-A
Auto drain type
Float type
Auto drain valve type
N.C. (Normally closed: Drain port is closed when pressure is not applied)
N.O. (Normally open: Drain port is open when pressure is not applied)
Fluid
Compressed air
23 to 140°F [−5 to 60°C] (No freezing)
Proof pressure
218psi [1.5 MPa]
Max. operating pressure
145 psi [1.0 MPa]
Operating pressure range
∗
1
N.C.: 22 to 145 psi [0.15 to 1.0 MPa]
N.O.: 15 to 145 psi [0.1 to 1.0 MPa]
Port size
1/4, 3/8, 1/2
Drain port size
3/8
Bowl material
Polycarbonate
Bowl guard material
Polycarbonate
Weight
0.46 kg
Appearance color
White
∗1 Discharged flow rate of the air compressor should be 14 scfm [400 L/min (ANR)] or more.
AD402 04 AD
How to Order
Port size
Symbol Port size
02
1/4
03
3/8
04
1/2
Auto drain type
Symbol Description
C
∗
1
N.C. (Normally closed)
Drain port is closed when pressure is not applied.
D
∗
2
N.O. (Normally open)
Drain port is open when pressure is not applied.
See
P.6
Thread type
Symbol Type
Nil
Rc
F
G
N
NPT
Semi-standard specifications
Semi-standard
Symbol Description
∗
3
Bowl
Nil
Polycarbonate bowl
2
Metal bowl
6
Nylon bowl
Valve
Nil
None
∗
4
V
With bleed valve
Pressure
unit
Nil
Name plate and caution plate
for bowl in SI units
Z
∗
5
Name plate and caution plate
for bowl in imperial units
∗3 Chemical resistance of the bowl
See
P.7
∗4 For port size 1/4, the valve already mounted.
∗5 Only NPT can be selected.
This product is for overseas use only according to the
New Measurement Act. (The SI unit type is provided
for use in Japan.)
Semi-standard symbol: When plural options are
required, indicate them in alphanumeric order.
Example) AD402-N04D-2VZ-A
L
1
Symbol
∗1 When pressure is not applied, condensate which does not
start the auto drain mechanism will be left in the bowl.
Releasing the residual condensate before ending
operations for the day is recommended.
∗2 If the compressor is smaller than 3.7 kW, or discharge flow
is less than 14 scfm [400 L/min (ANR)], air leakage from
the drain cock may occur during start of operations. N.C.
type is recommended.
Proper use of float type auto drain
Specifications
Standard Specifications
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