PU220 Brass Solenoid Valves – 2/2 Way NC & NO
PU220 solenoid valves are robust, general-purpose brass valves designed for the reliable control of water, air, gas and light oils. Available in normally closed (NC) and normally open (NO) versions, they are widely used in industrial, commercial and automation systems.
How PU220 Solenoid Valves Work
Key Features
- Pressure range up to 16 bar
- Brass body construction
- Wide voltage options
- Reliable diaphragm design
Available Versions
- Normally Closed (NC)
- Normally Open (NO)
- WRAS Approved Water Valves
Typical Applications
- Water systems
- Compressed air
- Fuel / light oils
- General industrial automation
The Shako PU220 series 2 way Brass solenoid valve is an assisted lift electrically actuated valve for the ON/OFF control of fluids and gaseous media that are compatible with the materials of construction. Sometimes referred to as a direct acting, hung diaphragm, kick pilot or zero-rated valve, the PU220 valve is designed to physically lift the diaphragm and utilise any pressure differential between inlet and outlet to assist the opening or closing of the valve.
The PU220A is a 2/2-way (2 port / 2 positions) normally closed solenoid valve designed to stay closed until electrical power is applied.
When power is applied the coil is magnetised which in turn lifts the armature and diaphragm assembly whilst revealing a small pilot hole for pressure assistance.
The pilot works by allowing pressure above the diaphragm to vent out downstream so that the pressure difference combined force of the spring lift fully lift the diaphragm into the open position allowing full flow through the valve.
When the power is removed, the armature and diaphragm drop back down sealing the pilot hole, pressure increases above the diaphragm and the valve fully closes again within 20 to 50 milliseconds.
The NOPU220) (or PU220AN) is a (2 port / 2 positions) normally open solenoid valve designed to stay open until electrical power is applied.
When power is applied the armature lowers the diaphragm to seal, covering the internal pilot causing any inlet pressure to further assist the diaphragm into the closed position and the valve is then fully closed.
Pressure:
Pressure range is from vacuum to 8.5 or 12 Bar according to coil power level. (Normally closed only)
Diaphragm materials:
NBR rubber is standard, with options for Viton, EPDM or HNBR.
Solenoid coils:
PU220 standard coil is a 15 watt IP65 Class H CE DIN43650A 100% duty rated Nass Magnet System 13/30 coil voltages from 12vDC through to 380vAC
PU220 optional 18.5 Watt IP65 high power coil Class F DIN43650A 100% duty rated Nass Magnet System 13/36 coil voltages 12vDC through to 230vAC
PU220 Optional ATEX EExmIIT4 for hazardous area zones 21 and 22 voltages from 12vDC to 240vAC.
Materials of construction: Body Forged Brass SS41, Tube and internal parts Stainless Steel.
Ambient temperature range: -20C to +60C (according to solenoid coil)
Media temperature range: -40C to +160C (according to seal material)
Compatible media: Is based according to the materials of construction and diaphragm chosen, typically the PU220 valve is referred to as a General Purpose Solenoid valve, in that it is typically used for Vacuum, Suction, Compressed Air, Inert Gases, non-aggressive or corrosive liquids such as water, glycol, diesel and other light oils under 50 Centistokes viscosity.
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PU220 Solenoid Valves → View products
PU220 2/2 normally closed solenoid valves.
NOPU220 (PU220AN) 2/2 normally open solenoid valves:
PU220D WRAS 2/2 normally closed solenoid valves:
PU220 Solenoid Valve FAQs
Example:
What is a 2/2 way solenoid valve? A 2/2 way valve has two ports and two positions, controlling simple on/off flow.
What is the difference between NC and NO? Normally closed valves remain shut until powered, while normally open valves remain open until powered.
What are the different port sizes + types? PU220A is G (BSP) parallel thread, optional PU220N NPT thread, PU220F4 PN16 flange, PU220F3 ANSI150Lb flange or PU220F JIS10K flange.