Description
Shako PU225X High Pressure Armature Assembly – 50 Bar
The Shako 225320XNC System 13/30 armature assembly is a replacement 2/2 way normally closed solenoid operator assembly for Shako PU225X high-pressure solenoid valves.
Designed for pressure-assisted operation from 0.5 to 50 Bar, the assembly uses a 304 stainless steel armature tube, 430F stainless steel moving armature and 302 stainless steel spring with an NBR sealing system.
This is the second-generation PU225X-Z armature design, fitted to Shako high-pressure PU225X solenoid valves manufactured from July 2019, batch code G19 onwards.
The standard version incorporates a copper shading ring. A special version without a copper shading ring is available where required.
Function & Operation
Function: 2/2 Way Normally Closed
Operation: Pressure Assisted
Valve Series: Shako PU225X
Armature System: System 13/30
Working Pressure: 0.5 to 50 Bar
Pressure Test: 75 Bar
The PU225X is a pressure-assisted solenoid valve and therefore requires a minimum 0.5 Bar pressure differential for correct operation.
Construction
Armature Tube: 304 stainless steel
Armature / Plunger: 430F stainless steel
Spring: 302 stainless steel
Seal: NBR
Shading Ring: Copper standard
Mounting Thread: M20 × 1.0mm
The stainless steel construction provides a robust replacement operator assembly specifically intended for the demanding pressure range of the PU225X valve series.
Shading Ring Options
Copper Shading Ring – Standard
The standard armature assembly incorporates a copper shading ring.
Without Copper Shading Ring – Special Option
A special version without the copper shading ring is also available.
When replacing an existing assembly, the electrical configuration and original valve specification should be checked before selecting the no-copper version.
Pressure Rating
Minimum Differential Pressure: 0.5 Bar
Maximum Working Pressure: 50 Bar
Factory Test Pressure: 75 Bar
This distinguishes the PU225X armature assembly from standard Shako 225 Series armatures intended for lower-pressure valve applications.
PU225X Compatibility
This armature is the second-generation PU225X-Z design introduced by Shako in July 2019.
Compatible with:
✓ Shako PU225X high-pressure solenoid valves
✓ PU225X-Z second-generation design
✓ Valves manufactured from July 2019 onwards
✓ Batch code G19 onwards
For earlier PU225X valves manufactured before this design change, compatibility should be confirmed before ordering.
Identification
Manufacturer: Shako
Series: PU225X
Armature Type: PU225X-Z second generation
Model / Reference: 225320XNC
System: 13/30
Mounting Thread: M20 × 1.0mm
A useful identification point when servicing older valves is the manufacturing batch code. The second-generation assembly applies to valves from batch G19 onwards.
Maintenance & Replacement
The armature assembly contains the principal moving electromagnetic components responsible for opening and closing the pilot section of the solenoid valve.
Replacement may be appropriate where an existing assembly is suffering from:
✓ Worn armature sealing surface
✓ Damaged or weakened spring
✓ Contamination within the armature tube
✓ Excessive armature wear
✓ Internal leakage through the pilot seal
✓ Mechanical sticking
✓ Damage to the armature tube
Before replacing the assembly, isolate the fluid supply, fully relieve system pressure and disconnect the electrical supply.
Typical Applications
✓ Shako PU225X valve servicing
✓ High-pressure compressed air systems
✓ High-pressure water systems
✓ Industrial process equipment
✓ High-pressure fluid control
✓ OEM machinery
✓ Preventative valve maintenance
✓ Solenoid valve refurbishment
Technical Specification
Manufacturer: Shako Co Ltd
Model: 225320XNC
Valve Series: PU225X
Type: High-pressure solenoid valve armature assembly
Function: 2/2 way normally closed
Operation: Pressure assisted
System: 13/30
Working Pressure: 0.5–50 Bar
Test Pressure: 75 Bar
Mounting Thread: M20 × 1.0mm
Armature Tube: 304 stainless steel
Armature: 430F stainless steel
Spring: 302 stainless steel
Seal Material: NBR
Shading Ring: Copper
Special Option: Without copper shading ring
Design: Second-generation PU225X-Z
Compatibility: July 2019 / batch G19 onwards
Important Compatibility Note
This is the second-generation PU225X-Z armature assembly.
It has been fitted to Shako PU225X high-pressure solenoid valves since July 2019, batch code G19 onwards.
For PU225X valves manufactured before G19, check the existing armature design before ordering rather than assuming interchangeability.
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