Description
3/4" Brass High Vacuum Solenoid Valve – AD-20-V-G2-V
Normally Closed Zero-Rated Vacuum Solenoid Valve – Full Vacuum to 10 Bar
The CS Fluid Power AD-20-V-G2-V is a high-performance 3/4" brass vacuum solenoid valve designed for reliable control and isolation of industrial vacuum and compatible gas systems.
Using a 2/2 way normally closed, zero-rated assisted-lift design, the valve operates from high vacuum at -101 kPa (99.67% vacuum) through zero differential pressure and into positive pressure.
The AD-20-V features a larger 20 mm orifice with Cv 9.3, providing substantially increased flow capacity while retaining a maximum differential pressure of 10 Bar AC or 7 Bar DC.
Valve Function & Operation
Function: 2/2 way normally closed
Operation: Assisted lift, zero rated
The valve is closed when electrical power is removed. Energising the solenoid operator opens the valve and allows flow through the 20 mm orifice.
Its zero-rated assisted-lift construction allows operation without the minimum pressure differential normally required by conventional pilot-operated solenoid valves.
Ports & Connections
Port size: 3/4" BSPP
Optional:
✓ NPT thread
Orifice: 20 mm
The larger 20 mm flow path makes the AD-20-V particularly useful where both high-vacuum capability and greater flow capacity are required.
Vacuum & Pressure Performance
Vacuum rating: -101 kPa
Equivalent vacuum: 757.56 mmHg relative
99.67% vacuum
Maximum AC pressure: 10 Bar
Maximum DC pressure: 7 Bar
Cv flow factor: 9.3
Construction & Materials
Body: Brass
Tube and internal parts: Stainless steel
Seals and gaskets: FKM / Viton
Moulded coil: Resin
Maximum media temperature: +120°C
Ambient temperature: -20°C to +60°C
Mounting position: Coil upright
Opening / closing time: 50 ms maximum.
Seal & Media Compatibility
The standard FKM / Viton seals are suitable for vacuum service and many compatible industrial gases and fluids.
Typical duties include:
✓ Vacuum
✓ Air
✓ Compatible gases
Compatibility should be checked where aggressive gases, unusual process media or oxygen service are involved.
Coil & Electrical
Standard coil: WPG2
Duty: 100% continuous
DC power: 18 Watts
AC power:
18.7 VA inrush
15.3 VA holding
Insulation: Class H, 180°C
Protection: IP67 with connector
Connection: DIN43650A
Voltage Options
DC:
✓ 12VDC
✓ 24VDC
✓ 48VDC
✓ 110VDC
AC 50/60Hz:
✓ 24VAC
✓ 48VAC
✓ 110VAC
✓ 240VAC
✓ 380VAC
Voltage tolerance: -10% / +10%.
ATEX / IECEx Coil Option
An optional Nass Magnet explosion-protected solenoid operator is available for hazardous-area applications.
✓ Ex mb IIC T4 Gb
✓ Ex mb tb IIIC T130°C Db
✓ Zone 1 gas applications
✓ Zone 21 dust applications
✓ ATEX Category 2G / 2D
✓ Gas Group IIC
✓ Dust Group IIIC
✓ IP65 protection
✓ Maximum media temperature +80°C
✓ Maximum operating pressure 3 Bar
ATEX Certificate: PTB 03 ATEX 2086 X
IECEx Certificate: IECEx PTB 05.0005X
ATEX Directive: 2014/34/EU
With this operator fitted, use the reduced operating range of vacuum through to +3 Bar.
As before, the ATEX / IECEx certification is for the solenoid operator, not automatically certification of the complete brass valve assembly.
Optional Manual Override
A top-mounted lift-and-turn manual override is available for the AD Series, allowing manual valve operation during commissioning, testing or maintenance.
Typical Applications
✓ Industrial vacuum systems
✓ Vacuum handling equipment
✓ Vacuum gripping systems
✓ Packaging machinery
✓ Laboratory vacuum equipment
✓ Vacuum chambers
✓ Process automation
✓ OEM machinery
✓ Automated production equipment
✓ Compatible industrial gas systems
High-Flow Vacuum Control
With its 20 mm orifice and Cv 9.3, the AD-20-V offers considerably greater flow capacity than the smaller 3/8" and 1/2" versions while retaining the same high-vacuum capability.
Its ability to operate from -101 kPa vacuum through zero differential pressure and into positive pressure makes it a versatile solution for industrial vacuum systems where a conventional pressure-assisted solenoid valve would not operate reliably.
Ordering Information
AD-20-V-G2-V + Voltage
Specify:
✓ Required voltage
✓ BSPP or optional NPT thread
✓ Standard or ATEX/IECEx operator
✓ Manual override if required
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