1/4" 5/2 Way Double Solenoid Pneumatic Valve – BM520D
The BM520D is a high-flow 1/4" 5/2 way double solenoid pneumatic valve designed for reliable directional control of double-acting pneumatic cylinders and air actuators.
Its compact 22mm anodised aluminium body, internal pilot operation and bistable double-solenoid design provide dependable pneumatic switching with maintained spool position after the electrical signal is removed.
With lockable manual overrides, IP65 protection and body or manifold mounting options, the BM520D is ideal for industrial automation, OEM machinery, pneumatic control panels and multi-valve installations.
Valve Specification
Function: 5/2 way double solenoid
Operation: Internal pilot
Port size: 1/4" BSP
Optional threads: NPT or Rc
Exhaust ports: 1/8" BSP
Valve width: 22mm
Effective orifice: 18mm²
Operating pressure: 2 to 8 Bar
Proof 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
Mounting position: Any position
Coil & Electrical Specification
Power consumption: 4.5 Watts each coil
Protection rating: IP65
Insulation class: Class F
Duty cycle: 100% continuous duty
Connection options:
DIN43650B connector (standard)
300mm flying lead wire (optional)
Voltage Options
12V DC
24V DC
24V AC
110V AC
230V AC 50/60Hz
ATEX / IECEx Coil Option
Optional Nass Magnet System 8/22 explosion-protected solenoid operators are available for hazardous area applications.
✓ Ex mb IIC T4 Gb
✓ Ex mb tb IIIC T130°C Db
✓ Zone 1 gas and Zone 21 dust
✓ ATEX Category 2G / 2D
✓ Gas Group IIC / Dust Group IIIC
✓ Protection rating: IP65
✓ 100% continuous duty
✓ Ambient: -20°C to +50°C
✓ ATEX: PTB 00 ATEX 2001 X
✓ IECEx: IECEx PTB 05.0006X
✓ ATEX Directive: 2014/34/EU
Double Solenoid Operation
The BM520D uses two independently controlled solenoids to shift the valve spool between its two operating positions.
Energising one solenoid shifts the valve to one position. Energising the opposite solenoid shifts the valve to the alternate position.
Once switched, the valve remains in its last selected position after the electrical signal is removed until the opposite solenoid is energised. This bistable operation is particularly useful where the commanded pneumatic position needs to be maintained without continuously energising a coil.
The lockable manual overrides allow valve operation during commissioning, machine setup, maintenance and functional testing without electrical power.
Mounting Options
Individual body-mounted installation
MF520 manifold systems
Multi-station manifold assemblies are available for compact pneumatic control installations.
Typical Applications
Double-acting pneumatic cylinders
Pneumatic actuators
Industrial automation
OEM machinery
Pneumatic control panels
Packaging machinery
Material handling equipment
Assembly machinery
Process control systems
Multi-valve manifold systems
General compressed air installations
Quality & Reliability
The BM520D combines a compact 22mm anodised aluminium body with high-flow internal pilot operation and bistable double-solenoid control for dependable long-term pneumatic operation.
Its maintained spool positioning, lockable manual overrides and manifold mounting capability make it particularly suitable for automated machinery and multi-valve pneumatic control systems.
Pressure:
1.5 Bar, 1.6 Bar, 2 Bar, 2.5 Bar, 3 Bar, 3.5 Bar, 4 Bar, 4.5 Bar, 5 Bar, 5.5 Bar, 6 Bar, 6.5 Bar, 7 Bar, 7.5 Bar, 8 Bar, 8.5 Bar, 9 Bar, 10 Bar
