Description
3/4 Inch Normally Open Brass Steam Solenoid Valve 0.5–20 Bar – CS Fluid Power NOSA20
A heavy-duty, pressure-assisted piston operated 2/2 way normally open brass solenoid valve designed for high-flow, high-pressure and high-temperature applications. The NOSA20 is a robust, long-life steam valve that remains open without power and closes when energised, making it ideal for fail-safe steam and thermal process control systems.
Valve Function & Operation
Function: 2/2 way normally open
Operation: Pressure assisted piston operated
Failsafe operation: Open without power, closes when energised
Minimum operating pressure: 0.5 Bar differential
Recommended mounting: Horizontal pipework with coil upright
Ports & Flow
Port size: 3/4" BSPP
Optional threads: NPT or Rc
Orifice size: 20.0 mm
Kv flow factor: 133 L/min based on water with 1 Bar pressure drop
Pressure & Temperature
Steam pressure range: 0.5 to 12 Bar
Air, water and oil pressure range: 0.5 to 20 Bar
Maximum media temperature: +180°C
Ambient temperature: -40°C to +60°C
Maximum media viscosity: 50 CST
Opening / closing time: 200 mSec maximum
Construction & Materials
Body material: Forged brass
Internal components: Stainless steel and brass
Piston seat: PTFE
Piston ring: PTFE + MoS₂
Seals and gaskets: PTFE graphite impregnated
Tube and springs: Stainless steel
Armature: Stainless steel
Designed for high temperature operation and extended service life
Media Compatibility
Steam
Air
Water
Hot water
Light oils
Other fluids up to 50 CST
Gases compatible with materials of construction
Coil & Electrical
Standard coil: WPG2
Power consumption: 18 Watts DC / 18.7 VA AC inrush
Insulation class: Class H (180°C)
Protection rating: IP68 coil
DIN 43650A connector
100% duty rated
UL, CSA and CE approved
Supplied with IP67 LED connector
Overall protection rating IP67
Voltage Options
DC: 12V, 24V, 48V
AC: 24V, 48V, 110V, 230V & 380V (50/60 Hz)
Benefits
Normally open fail-safe operation
Suitable for steam up to +180°C
High pressure capability up to 20 Bar
High flow rate of 133 L/min
Heavy-duty piston operated design
Long service life in demanding applications
Forged brass body construction
PTFE graphite sealing for high-temperature service
IP68 coil with IP67 connector
Suitable for continuous operation
Fast UK delivery available
Additional Options
Manual override circuit
Degreased for oxygen service
NPT thread connections
Stainless steel body version available
Normally closed versions available
Flanged versions available
Typical Applications
Fail-safe steam control systems
Steam control and isolation
Steam boilers and generators
Industrial thermal systems
Process heating equipment
Heat exchangers
High-flow on/off steam applications
Long-term high-pressure and high-temperature service
HS Code: 84818030
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