Description
1¼" Zero Pressure Brass Solenoid Valve – CS AD35
CS Fluid Power Assisted-Lift Normally Closed Solenoid Valve
The CS Fluid Power AD35 is a very high-flow 1¼" assisted-lift (Magnalift) 2/2 way normally closed brass solenoid valve designed for vacuum, zero-pressure and general industrial fluid control applications.
Unlike conventional pilot-operated valves, the assisted-lift design requires no minimum pressure differential, allowing operation from 0 Bar while retaining a large 35mm orifice and exceptionally high flow capacity.
Suitable for air, water, light oils, vacuum and compatible fluids and gases, the AD35 combines a forged brass body, stainless steel internals and a serviceable diaphragm design for reliable continuous-duty operation.
Typical Applications
Compressed air systems
Water and fluid handling
Vacuum systems
Gravity-fed and low-pressure systems
Light oil and fuel systems
Industrial gases
Process engineering installations
OEM machinery and test equipment
Chemical dosing systems
High-flow industrial automation
Technical Specification
Function: 2/2 way normally closed
Valve State: De-energised CLOSED / Energised OPEN
Operation: Assisted-lift (Magnalift) diaphragm
Minimum Pressure Differential: 0 Bar
AC Operating Pressure: 0 to 10 Bar
DC Operating Pressure: 0 to 7 Bar
Vacuum Rating: 10⁻⁶ Torr
Port Size: 1¼" BSPP female
Optional Threads: NPT or Rc
Orifice Size: 35.0mm
Kv Flow Factor: 371.8 L/min based on water with 1 Bar pressure drop
Maximum Media Viscosity: 50 cSt
Body Material: Forged brass
Internal Components: Stainless steel
Standard Seal: NBR
Optional Seals: EPDM, FKM (Viton®), Silicone, VST, Neoprene, ECO, HNBR or Hypalon
Manual Override: Optional
Media Compatibility
Suitable for:
Air and inert gases
Water
Light oils
Vacuum
LPG
Diesel and fuel oils
Petrol and propane
Nitrogen
Carbon dioxide
Argon
Antifreeze and glycol solutions
Kerosene
Compatible fluids and gases up to 50 cSt
Oxygen service when specifically ordered in degreased configuration
Seal selection should always be checked against the particular fluid, concentration and operating temperature.
Temperature Limits
NBR: Up to +100°C
FKM (Viton®): Up to +120°C
EPDM: Up to +120°C
Silicone: Up to +120°C
Other seal materials available subject to application requirements.
Coil & Electrical Specification
Coil: WPG2
Power Consumption: 18 Watts
Electrical Connection: DIN 43650A
Insulation Class: Class H 180°C
Duty Rating: 100% continuous duty
Coil Protection: IP68
Overall Protection Rating: IP67
Connector: LED DIN connector included
Approvals: CE, UL & CSA
Voltage Options
DC:
12VDC, 24VDC or 48VDC
AC 50/60Hz:
24VAC, 48VAC, 110VAC, 230VAC or 380VAC
Manual Override Option
Optional manual override versions are available for applications requiring manual valve operation during commissioning, testing or loss of electrical control.
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
Maximum operating pressure with ATEX operator: 0–3 Bar
Oxygen Service Option
A specially degreased version is available for oxygen service.
All oil and grease contamination is removed during the cleaning process. Seal selection and operating conditions must be specified when ordering for oxygen applications.
Benefits
✓ Operates from zero pressure
✓ Vacuum compatible to 10⁻⁶ Torr
✓ Very large 35mm orifice
✓ Exceptional Kv 371.8 L/min flow capacity
✓ Up to 10 Bar AC operation
✓ Wide choice of sealing materials
✓ Optional manual override
✓ Optional ATEX / IECEx operator
✓ Oxygen-service option available
✓ Serviceable diaphragm construction
✓ Reliable continuous-duty operation
✓ Free UK delivery available
Why Choose the AD Assisted-Lift Valve?
The AD35 combines the zero-pressure capability of an assisted-lift valve with the exceptionally high flow capacity required by larger 1¼" pipework.
Its Magnalift construction allows reliable operation from 0 Bar differential pressure, including vacuum applications, while the large 35mm orifice provides a Kv flow factor of 371.8 L/min.
This makes the AD35 particularly suitable for vacuum, gravity-fed, low-pressure and variable-pressure systems where a conventional pilot-operated solenoid valve may not operate reliably.
Related Products & Categories
