Description
1/4", 3/8" & 1/2" 3/2 Way Pneumatic Solenoid Valve – PU322 / PU322N
The PU322 Series is a premium range of 3/2 way pneumatic solenoid valves designed for reliable directional control of single-acting pneumatic actuators, air cylinders and pilot-operated systems. Available in normally closed (PU322) or normally open (PU322N) versions, the range combines a robust anodised aluminium body with an efficient internal pilot design to deliver dependable performance in industrial automation, OEM machinery and pneumatic control systems.
Available in 1/4", 3/8" and 1/2" BSP port sizes, the PU322 Series offers high flow capacity, lockable manual override and optional hazardous area coils for demanding industrial applications.
Why Choose the PU322 Series?
✓ Available in normally closed or normally open versions
✓ 1/4", 3/8" and 1/2" BSP port sizes
✓ High-flow internal pilot design
✓ Lockable manual override
✓ Robust anodised aluminium body
✓ IP65 protection
✓ 100% continuous duty rated
✓ DIN43650B connector or flying lead options
✓ Optional ATEX explosion-proof coil
✓ Proven industrial reliability
Valve Specification
Function:
3/2 way normally closed (PU322)
Optional normally open (PU322N)
Operation: Internal pilot
Port sizes:
1/4" BSP
3/8" BSP
1/2" BSP
Optional threads: NPT or Rc
Valve widths:
26mm (1/4")
30mm (3/8")
34mm (1/2")
Effective orifice:
18mm² (1/4")
35mm² (3/8")
70mm² (1/2")
Operating pressure: 2 to 8 Bar
Maximum working pressure: 10 Bar
Body: Anodised aluminium alloy
Seals: NBR
Media: Compressed air and inert gases
Media temperature: -10°C to +50°C
Manual override: Lockable manual override
Mounting position: Any position
Coil & Electrical Specification
Power consumption: 4.5 Watts
Protection rating: IP65
Insulation class: Class F
Duty cycle: 100% continuous duty
Connection options:
DIN43650B connector
300mm flying lead wire (optional)
Voltage Options
12V DC
24V DC
48V DC
110V DC
12V AC
24V AC
48V AC
110V AC
230V AC
Hazardous Area Option
ATEX Ex mb IIC T4 Gb
ATEX Ex mb tb IIIC T130°C Db
Suitable for Zone 21 & Zone 22 hazardous areas using the optional certified explosion-proof coil.
Valve Operation
PU322 – Normally Closed
When the solenoid is energised, the valve opens to supply compressed air to the outlet port. Removing power returns the valve to its normally closed position via the internal spring.
PU322N – Normally Open
When the solenoid is energised, the valve closes the air supply. Removing power automatically returns the valve to its normally open position.
The lockable manual override allows simple commissioning, maintenance and functional testing without electrical power.
Typical Applications
Single-acting pneumatic cylinders
Pilot air control
Industrial automation
OEM machinery
Packaging equipment
Assembly machinery
Process control systems
Pneumatic control panels
General compressed air installations
Quality & Reliability
Every PU322 Series valve is manufactured from anodised aluminium alloy and individually function tested before dispatch to ensure reliable operation and consistent performance. The high-flow internal pilot design, lockable manual override and proven industrial construction provide dependable long-term performance in demanding pneumatic applications.
Technical Information
Protection: IP65
Insulation Class: Class F
Maximum working pressure: 10 Bar
Valve widths:
26mm (1/4")
30mm (3/8")
34mm (1/2")
Net weight:
1/4" – 280g
3/8" – 450g
1/2" – 685g
HS Code: 8481201000
Why Buy From Solenoid Valve World?
✓ Large UK stocks available
✓ Technical support from pneumatic specialists
✓ Spare coils and connectors available
✓ Optional ATEX coil versions
✓ Manifold mounting options available
✓ Free next working day UK delivery
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