Description
1/4" NAMUR Pneumatic Solenoid Valve – CY525-02D 3/2 & 5/2 Way Double Acting
The CY525-02D is a premium 1/4" NAMUR mounted pneumatic solenoid valve designed for direct installation onto quarter-turn pneumatic actuators used on ball valves and butterfly valves. Featuring dual-solenoid operation, the valve remains in its last switched position until the opposite coil is energised, providing reliable bistable control for double-acting pneumatic actuators.
The innovative reversible gasket allows the valve to be configured as either a 3/2 way or 5/2 way valve, making it suitable for a wide range of pneumatic actuator applications. Optional ATEX and Intrinsically Safe coils are available for hazardous area installations.
Why Choose the CY525 Series?
✓ Configurable as 3/2 or 5/2 operation
✓ Double-solenoid bistable operation
✓ Direct NAMUR actuator mounting (VDI/VDE 3845)
✓ Suitable for single and double acting actuators
✓ High flow internal pilot design
✓ Manual override included
✓ Robust anodised aluminium body
✓ IP65 coil protection
✓ Optional ATEX and Intrinsically Safe coils
✓ ISO standard mounting pattern
✓ Proven industrial reliability
Valve Function & Operation
Function:
3/2 way
5/2 way
Valve configuration selected by rotating the supplied NAMUR gasket.
Operation: Internal pilot
Valve type: Double solenoid (bistable)
Manual override: Lockable manual override included
Port connection: NAMUR interface
1/4" BSP
Optional threads: NPT or Rc
Exhaust ports: 1/4" BSP
Operating pressure: 1.5 to 8 Bar
Maximum working pressure: 10 Bar
Proof pressure: 9.9 Bar
Effective flow area: 35mm²
Ambient temperature: -10°C to +50°C
Construction
Body: Anodised aluminium alloy
Seals: NBR
Media: Compressed air & Inert gases
Mounting: Direct NAMUR mounting to VDI/VDE 3845 pneumatic actuators
Coil & Electrical Specification
Coil power: 4.5 Watts
Protection rating: IP65
Insulation class: Class F
Duty cycle: 100% continuous duty
Connector: DIN43650B
Optional connection: 300mm flying lead wire
Voltage Options
12V DC
24V DC
48V DC
110V DC
12V AC
24V AC
48V AC
110V AC
230V AC
Hazardous Area Options
ATEX Explosion Proof Coil
Ex mb IIC T4 Gb
Ex mb tb IIIC T130°C Db
Temperature class: T4 (T130°C)
Suitable for Zone 21 and Zone 22 hazardous areas.
Intrinsically Safe Coil
24V DC
II 2 G Ex ia IIB/IIC T6 Ga
or
II 2 G Ex ia IIB/IIC T4 Ga
Ambient temperature:
-40°C to +50°C (T6)
-40°C to +85°C (T4)
Protection: IP65
Certification:
PTB 02 ATEX 2154
IECEx PTB08.0023
Ideal for hazardous process plants requiring intrinsically safe electrical circuits.
NAMUR Configuration
The supplied reversible gasket allows simple conversion between:
3/2 Way
Suitable for selected pneumatic actuator configurations and specialist control circuits.
5/2 Way
Designed for reliable control of double-acting pneumatic actuators.
The valve body remains unchanged, allowing rapid conversion without replacing the valve.
Supplied Accessories
NAMUR mounting bolts
M5 × 40mm screws
Washers
Reversible NAMUR switching gasket
Ready for direct installation onto compatible pneumatic actuators.
Typical Applications
Pneumatic ball valves
Butterfly valve actuators
Quarter-turn pneumatic actuators
Process automation
Chemical processing
Water treatment plant
Oil and gas installations
OEM valve packages
Industrial automation
Hazardous area installations
Quality & Reliability
Every CY525-02D valve is individually function tested before dispatch to ensure reliable operation and long service life. The robust anodised aluminium construction, lockable manual override and configurable 3/2 or 5/2 operation make the CY525 Series a dependable solution for industrial pneumatic actuator control.
Technical Information
NAMUR standard: VDI/VDE 3845
Protection: IP65
Insulation class: Class F
Duty cycle: 100%
Maximum working pressure: 10 Bar
HS Code: 8481201000
Why Buy From Solenoid Valve World?
✓ Large UK stocks available
✓ Technical support from pneumatic specialists
✓ ATEX and Intrinsically Safe options available
✓ Spare coils and accessories stocked
✓ Free next working day UK delivery
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