Description
1/8" Zero Pressure Brass Solenoid Valve – CS AD6
CS Fluid Power Direct-Acting Normally Closed Solenoid Valve
The CS Fluid Power AD6 is a compact 1/8" direct-acting 2/2 way normally closed brass solenoid valve designed for vacuum, zero-pressure and general industrial fluid and gas control applications.
Unlike pressure-assisted or pilot-operated valves, the direct-acting design requires no minimum pressure differential, allowing reliable operation from 0 Bar and making the AD6 particularly suitable for vacuum, low-pressure and intermittent pressure applications.
Available with 3mm, 4mm or 5mm orifices, the AD6 series provides a choice of flow and pressure capabilities to suit air, water, light oils, inert gases, vacuum and compatible fluids up to 50 cSt.
Model & Performance Options
AD6A
Orifice: 3.0mm
Kv Flow Factor: 4.3 L/min
AC Pressure: 0 to 10 Bar
DC Pressure: 0 to 7 Bar
AD6B
Orifice: 4.0mm
Kv Flow Factor: 9.7 L/min
AC Pressure: 0 to 7 Bar
DC Pressure: 0 to 5 Bar
AD6C
Orifice: 5.0mm
Kv Flow Factor: 10.7 L/min
AC Pressure: 0 to 5 Bar
DC Pressure: 0 to 3.5 Bar
Based on water with 1 Bar pressure drop.
Typical Applications
Vacuum systems
Pneumatic control circuits
Compressed air systems
Low-pressure gas control
Water control
Light oil systems
Fuel control
OEM machinery
Laboratory equipment
Test equipment
General industrial automation
Technical Specification
Function: 2/2 way normally closed
Valve State: De-energised CLOSED / energised OPEN
Operation: Direct acting
Minimum Pressure Differential: 0 Bar
Port Size: 1/8" BSPP female
Optional Threads: NPT or Rc
Orifice Sizes: 3.0mm, 4.0mm or 5.0mm
Kv Flow Factor: 4.3 to 10.7 L/min
Maximum AC Pressure: 10 Bar according to orifice
Maximum DC Pressure: 7 Bar according to orifice
Vacuum Rating: 10⁻⁶ Torr
Maximum Media Viscosity: 50 cSt
Opening / Closing Time: 20ms maximum
Mounting Position: Any position
Body Material: Brass
Internal Components: Stainless steel
Tube / Spring: 304 stainless steel / brass
Armature: 430F stainless steel
Standard Seal: FKM (Viton®)
Optional Seals: EPDM, NBR, Silicone, PTFE, VST, Neoprene, ECO, HNBR, Hypalon or Butyl IIR
Shading Ring: Copper
Optional Shading Ring: Silver
Manual Override: Optional
Media Compatibility
Suitable for:
Air and inert gases
Water
Light oils
Vacuum applications
Compatible fuels
Neutral gases
Non-corrosive liquids
Fluids and gases compatible with brass and selected seal material
Maximum media viscosity: 50 cSt
Temperature Limits
Maximum media temperature depends upon the selected seal material.
NBR: up to +100°C
Silicone: up to +120°C
EPDM: up to +120°C
FKM (Viton®): up to +120°C
PTFE: up to +120°C
VST: up to +120°C
Other seal materials available subject to application requirements.
Ambient Temperature: -10°C to +50°C
Coil & Electrical
Standard Coil: WPG1
DC Power Consumption: 12 Watts
AC Inrush: 11.2 VA
AC Holding: 8.2 VA
Insulation Class: Class H 180°C
Duty Rating: 100% continuous duty
Connector: DIN 43650A
Coil / Connector Protection: IP67 with connector fitted
Electrical Connection: 3-spade DIN 43650A
UL / CSA approved coil
Voltage Options
DC: 12V or 24V
AC: 24V, 110V or 230V (50/60Hz)
Voltage Tolerance: -10% / +15%
ATEX / IECEx Coil Option
Optional Nass Magnet explosion-protected solenoid operator available.
✓ Ex mb IIC T4 Gb
✓ Ex mb tb IIIC T130°C Db
✓ Suitable for Zone 1 gas and Zone 21 dust hazardous areas
✓ ATEX Category 2G / 2D
✓ Protection rating: IP65
✓ Maximum media temperature: +80°C
✓ ATEX Certificate: PTB 03 ATEX 2086 X
✓ IECEx Certificate: IECEx PTB 05.0005X
✓ ATEX Directive: 2014/34/EU
Pressure range according to WPG1 12W coil configuration
Benefits
✓ Operates reliably from 0 Bar
✓ Suitable for vacuum applications
✓ No pilot pressure required
✓ Choice of three orifice sizes
✓ Up to 10 Bar operating pressure
✓ Fast 20ms maximum response
✓ Compact direct-acting construction
✓ Wide choice of sealing materials
✓ Any-position mounting
✓ Optional manual override
✓ Optional hazardous-area operator
✓ Reliable continuous-duty operation
Why Choose the AD6 Direct-Acting Valve?
The AD6 is particularly useful where a conventional pilot-operated solenoid valve cannot function because there is insufficient pressure differential across the valve.
Its direct-acting design operates from 0 Bar and under vacuum, making it suitable for low-pressure systems, vessel drainage, vacuum lines and applications where system pressure may fluctuate or fall completely to zero.
The three available orifice sizes also allow the valve to be selected according to the required balance between maximum pressure and flow capacity — from the 3mm AD6A for operation up to 10 Bar AC through to the higher-flow 5mm AD6C.
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