Description
1" Stainless Steel Normally Open Solenoid Valve – NOSPU225A-08
A pressure-assisted 2/2 way normally open stainless steel solenoid valve designed for higher-flow applications where a minimum pressure differential is available. Suitable for air, water, oils and compatible gases, with options for WRAS-approved seals, oxygen service degreasing and ATEX-certified coils.
Designed to remain open without power and close only when energised, making it ideal for fail-safe fluid control systems where flow must be maintained during power loss.
Valve Function and Operation
Function: 2/2 way normally open
Operation: Pressure assisted
Minimum operating pressure: 0.5 Bar differential
Differential pressure range: 0.5 to 10 Bar
Maximum working pressure: 15 Bar
Ports and Flow
Port size: 1" BSPP
Optional threads: NPT or Rc
Orifice size: 25.0 mm
Kv flow factor: 165 L/min based on water with 1 Bar pressure drop
Construction and Materials
Body material: 316 stainless steel
Internal components: Stainless steel
Seal material (standard): Viton (FKM)
Optional seals: EPDM, NBR, HNBR
WRAS approved EPDM seal option available
Shading ring: Copper
Optional silver shading ring (AC or DC)
Optional without shading ring (DC only or AC with rectified DIN connector to DC)
Suitable for demineralised water, RO water, pure water and AdBlue
Media Compatibility
Air
Water and pure water
RO and demineralised water
Oil and light oils
AdBlue
Other fluids up to 50 CST
Gases compatible with valve materials
Temperature Limits
NBR: -15°C to +80°C
Viton (FKM): -10°C to +180°C
EPDM: -5°C to +130°C
HNBR: -40°C to +150°C
Coil and Electrical
Coil power: 15 W
Magnet class: H
Connector type: DIN 43650A
Protection rating: IP65 (connector included)
Duty cycle: 100% rated
Voltage Options
6V DC, 12V DC, 24V DC, 48V DC, 110V DC, 220V DC
12V AC, 24V AC, 36V AC, 48V AC, 110V AC, 230V AC, 380V AC 50/60 Hz
ATEX Option
ATEX EEx m II T4
Temperature class: T4, T130°C
Protection: Ex mb IIC T4 Gb and Ex mb tb IIIC T130°C Db
Suitable for hazardous areas Zone 21 and 22
Maximum media temperature: +80°C
Certifications and Compliance
ATEX approved according to Directive 94/9/EC
Certificate number: Sira 09ATEX6180X
Complies with EN 13463-1:2001 and EN 1364-5:2003
Additional Options
Degreased version available with all oil and grease removed
Suitable for oxygen service when degreased
WRAS approved EPDM seal option available
Benefits
Normally open fail-safe operation
Corrosion-resistant 316 stainless steel construction
High Kv flow rate of 165 L/min
Suitable for RO, demineralised and pure water systems
Optional WRAS-approved seal materials
Optional oxygen-cleaned version
Optional ATEX-certified coil
Long service life
Fast UK delivery available
HS Code: 84818030
Typical Applications
Industrial process control
RO, demineralised and pure water systems
Chemical and fluid handling
Oxygen and clean gas service (degreased option)
Hazardous area installations
Fail-safe cooling water systems
Priority demand systems
Water treatment and filtration equipment
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