Key Features
- 1½" Normally Open Valve
- De-Energised Open
- 2/2 Way Operation
- Pressure Assisted Diaphragm
- 0.5–10 Bar Pressure Range
- Large 38mm Orifice
- High Flow Kv 367 L/min
- Brass Valve Body
- Stainless Steel Internals
- NBR Seals Standard
- EPDM, FKM & HNBR Options
- Up to +180°C with FKM
- 15W Nass Magnet Coil
- IP65 100% Duty Coil
- AC & DC Voltage Options
- Optional ATEX / IECEx Coil
- Zone 1 Gas / Zone 21 Dust
- Air, Water & Light Oils
Datasheets
Description
1½" Normally Open Brass Solenoid Valve 0.5–10 Bar – SHAKO PU225AN-14
The SHAKO PU225AN-14 is a high-flow 1½" BSP normally open brass solenoid valve designed for automatic control of water, compressed air, light oils and compatible industrial fluids. Featuring a pressure-assisted diaphragm, large 38mm orifice and Kv flow factor of 367 L/min, this 2/2 way valve provides reliable fluid control across a differential pressure range of 0.5 to 10 bar.
Designed for fail-open operation, the PU225AN-14 remains open when de-energised and closes when electrical power is applied. This makes it particularly suitable for industrial cooling systems, process water circulation, compressed air distribution and installations where fluid flow must continue following an electrical power failure.
Manufactured by SHAKO, the valve combines a durable brass body, stainless steel internal components and a choice of diaphragm materials with reliable industrial solenoid operation.
Normally Open Valve Operation
The PU225AN-14 is a 2/2 way normally open solenoid valve operating through a pressure-assisted diaphragm mechanism.
Power OFF → Valve OPEN, allowing fluid flow.
Power ON → Valve CLOSED, stopping fluid flow.
Power Failure → Valve returns to its normally open condition, provided the required operating conditions are maintained.
The valve requires a minimum differential pressure of 0.5 bar for reliable operation. It is not suitable for zero-pressure or gravity-fed applications where sufficient differential pressure cannot be maintained.
Port Size & Flow Performance
The 1½" PU225AN-14 features a large 38mm internal orifice and Kv flow factor of 367 L/min, providing high flow capacity for industrial fluid control.
Port Connection: 1½" BSP Female
Operating Pressure: 0.5–10 Bar Differential
Orifice Diameter: 38mm
Kv Flow Factor: 367 L/min
Valve Function: 2/2 Way Normally Open
Operating Principle: Pressure-Assisted Diaphragm
The 1½" BSP connection allows installation into larger industrial pipework, while the 38mm orifice provides substantial flow capacity for cooling water, process fluids and compressed air systems.
Construction & Materials
Body: Brass
Internal Components: Stainless Steel
Standard Diaphragm: NBR
Optional Diaphragms: EPDM, FKM (Viton®) and HNBR
The robust brass body provides dependable performance in industrial environments, while stainless steel internal components offer durability and corrosion resistance.
Alternative diaphragm materials are available to suit different compatible fluids and operating temperatures.
Seal Options & Temperature Ranges
NBR: -15°C to +80°C
EPDM: -5°C to +130°C
FKM (Viton®): -10°C to +180°C
HNBR: -40°C to +150°C
These temperature ranges depend on the selected seal material. The permissible operating temperature of the complete valve assembly must also account for the coil specification, media and installation conditions.
Suitable Media
The SHAKO PU225AN-14 is suitable for compatible industrial fluids including:
Compressed Air
Water and Cooling Water
Light Oils
Neutral Liquids
Compatible Inert Gases
Maximum Fluid Viscosity: 50 cSt
Media compatibility should be confirmed against the brass body, stainless steel internal components and selected diaphragm material.
Solenoid Coil & Electrical Specification
The standard PU225AN-14 is equipped with a Nass Magnet industrial solenoid coil designed for continuous operation.
Coil Power: 15 Watts
Insulation Class: H
Duty Rating: 100% ED Continuous
Electrical Connection: DIN 43650A Form A
Ingress Protection: IP65 with Correctly Fitted Connector
Available DC Voltages
12V DC, 24V DC, 48V DC, 110V DC and 220V DC.
Available AC Voltages
12V AC, 24V AC, 36V AC, 48V AC, 110V AC, 230V AC and 380V AC, 50/60Hz.
Voltage availability depends on the selected coil configuration.
Optional ATEX / IECEx Solenoid Coil
For hazardous-area installations, the SHAKO PU225AN-14 can be configured with an optional explosion-protected Nass Magnet solenoid operator.
The previously supplied PTB-certified configuration includes:
Gas Protection: Ex mb IIC T4 Gb
Dust Protection: Ex mb tb IIIC T130°C Db
ATEX Category: 2G / 2D
Hazardous Areas: Zone 1 Gas and Zone 21 Dust
Ingress Protection: IP65
Maximum Media Temperature: +80°C
Legacy ATEX Certificate: PTB 03 ATEX 2086 X
Legacy IECEx Certificate: IECEx PTB 05.0005X
ATEX Directive: 2014/34/EU
Nass Magnet has introduced replacement TÜV NORD-certified Ex m coils under updated manufacturer part numbers.
Current certification, electrical ratings, temperature classification and installation requirements must be confirmed against the exact ATEX coil supplied. Hazardous-area suitability of the complete valve assembly must be assessed before installation.
Typical Applications
Industrial Cooling Water Systems
High-Flow Process Water Control
Compressed Air Distribution
Industrial Automation Equipment
Cooling and Temperature Control Circuits
Automated Fluid Distribution
OEM Machinery and Equipment
Industrial Water Circulation
Systems Requiring Flow During Power Failure
Hazardous-Area Installations with Suitable Certified Components
Technical Specification
Manufacturer: SHAKO Co Ltd
Model: PU225AN-14
Valve Type: 2/2 Way Normally Open Solenoid Valve
Operating Condition: De-Energised Open / Energised Closed
Operating Principle: Pressure-Assisted Diaphragm
Port Size: 1½" BSP Female
Operating Pressure: 0.5–10 Bar Differential
Orifice Diameter: 38mm
Kv Flow Factor: 367 L/min
Body Material: Brass
Internal Components: Stainless Steel
Standard Seal: NBR
Optional Seals: EPDM, FKM (Viton®), HNBR
Suitable Media: Water, Air, Light Oils and Compatible Neutral Fluids
Maximum Fluid Viscosity: 50 cSt
Standard Coil: Nass Magnet 15W
Coil Insulation: Class H
Duty Rating: 100% ED Continuous
Electrical Connection: DIN 43650A Form A
Ingress Protection: IP65 with Connector
Voltage Options: AC and DC
ATEX / IECEx: Optional Certified Solenoid Operator
HS Code: 84818030
Why Choose the SHAKO PU225AN-14?
The SHAKO PU225AN-14 combines a large 1½" BSP connection, high-flow diaphragm design and normally open fail-safe operation in a durable industrial brass solenoid valve.
Its 38mm orifice and Kv flow factor of 367 L/min make it suitable for larger cooling water circuits, compressed air systems and industrial fluid distribution applications.
With multiple diaphragm materials, a wide choice of AC/DC voltages and optional ATEX-certified solenoid operators, the PU225AN-14 provides a versatile solution for demanding industrial installations.
✓ Normally Open – Power to Close
✓ Large 1½" BSP Connection
✓ High-Flow 38mm Orifice
✓ Kv 367 L/min Flow Capacity
✓ 0.5–10 Bar Differential Pressure
✓ Optional ATEX / IECEx Coil
✓ Free Next Day UK Delivery
Related Products & Categories
Technical Specification
Brand: Shako Co Ltd
Model: NOPU22514
Width: 96.00 mm
Height: 145.50 mm
Depth: 131.00 mm
Weight: 2.82 kg
Valve / Product Type: Solenoid Valve
Body Material: Brass
Voltage: 110vAC, 110vDC, 12vDC, 200vDC, 230VAC, 24vAC, 24vDC, 380vAC, 48vAC, 48vDC
Port Size: 11/2 thread
Function: 2/2 Failsafe Open
Operation: Pressure Assisted from 0.5 Bar
Pressure: 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
Seals: EPDM, HNBR, NBR, FKM (Viton)
Approvals:: ATEX Exm, IP65
Media: Air, Fluid (Non Aggressive), Gases (Non Aggressive), Oils + Fuels 50cSt Max, Water
Orifice: 38mm
Found in these Categories
- 1½ Brass Solenoid Valves
- Brass 2/2 N/Open - Pressure Assist
- Brass Solenoid Valves - 2/2 Normally Open
- Water Solenoid Valves
- Light Oil Solenoid Valves
- Fuel Solenoid Valves
- 11/2 Solenoid Valves
- 10 Bar Solenoid Valves
- 2/2 Normally Open Solenoid Valves
- 2/2 Normally Open - Pressure Assisted
- ATEX Ex m Encapsulation
- Large Solenoid Valves (1¼–3 Inch)
11/2" Brass Solenoid Valve 0.5-15 Bar 2/2 Way Normally Open
£213.94 incl. VAT £178.28 ex. VAT
-34% Was £324.14 incl. VAT
