Description
3/4" DN20 Flanged 316 Stainless Steel Solenoid Valve – ADS20PF
Normally Closed Zero-Rated PN16 Flanged Solenoid Valve – 0 to 10 Bar
The CS Fluid Power ADS20PF is a heavy-duty DN20 316 stainless steel flanged solenoid valve designed for reliable automatic control of air, water, vacuum, gases and other compatible industrial fluids.
Using a 2/2 way normally closed, zero-rated assisted-lift design, the valve operates from 0 Bar differential pressure, making it suitable for applications where conventional pilot-operated solenoid valves requiring a minimum pressure differential cannot be used.
Featuring a 20 mm orifice with 133 L/min water flow at 1 Bar pressure drop, the ADS20PF combines high flow capacity with corrosion-resistant 316 stainless steel CF8M construction and PN16 flanges as standard.
Valve Function & Operation
Function: 2/2 way normally closed
Operation: Assisted lift, zero rated
The ADS20PF remains closed when electrical power is removed. Energising the solenoid operator opens the valve and allows flow through the 20 mm internal orifice.
The zero-rated assisted-lift design allows operation without a minimum pressure differential, providing reliable switching from 0 Bar through to its maximum rated pressure.
Opening / closing time: 50 ms maximum
Mounting position: Coil upright
Flange & Connection
Port size: DN20 / 3/4" nominal
Standard flange: PN16
Optional flange standards:
✓ ANSI 150Lb RF
✓ JIS 10K
✓ Other flange options on request
Pressure & Flow Performance
Minimum differential pressure: 0 Bar
Maximum AC pressure: 10 Bar
Maximum DC pressure: 7 Bar
Orifice: 20 mm
Water flow: 133 L/min at 1 Bar ΔP
The large 20 mm flow path provides excellent capacity while the zero-rated operating principle allows reliable control where differential pressure may fall to zero.
Construction & Materials
Body: 316 stainless steel CF8M
Tube and spring: 304 stainless steel
Armature: 430F stainless steel
Other internal parts: 316 stainless steel
Moulded coil: Resin
The stainless steel construction provides excellent corrosion resistance for demanding industrial environments and compatible process media.
Seal Options & Media Compatibility
Standard seal: FKM / Viton
Optional seals:
✓ EPDM
✓ NBR
✓ Silicone
✓ VST
✓ HNBR
✓ ECO
✓ Neoprene
✓ Hypalon
✓ Butyl IIR
Typical compatible media can include:
✓ Compressed air
✓ Water
✓ Vacuum
✓ Light oils
✓ Inert gases
✓ Nitrogen
✓ Carbon dioxide
✓ Argon
✓ Glycol and antifreeze
✓ Compatible fuels and hydrocarbons
For LPG, petrol, diesel, propane, oxygen, fuel oils, aggressive chemicals or other specialist media, the correct seal configuration and material compatibility should be confirmed before ordering.
Maximum media viscosity: 50 cSt
Temperature
Maximum media temperature depends upon the selected seal material.
NBR: up to +100°C
FKM / EPDM / Silicone: up to +120°C
VST: up to +150°C
Ambient temperature: -20°C to +60°C
The ADSF Series has a maximum media temperature capability of +150°C when correctly configured.
Shading Ring Options
A copper shading ring is used for standard AC operation.
For reverse osmosis, demineralised and pure-water applications, an optional silver shading ring is available.
Options:
✓ Copper shading ring standard
✓ Silver shading ring AC or DC
✓ No shading ring for DC only
This provides additional flexibility for applications where copper contact with the process media is undesirable.
Coil & Electrical
Standard coil: WPG2
DC power: 18 Watts
AC power:
18.7 VA inrush
15.3 VA holding
Duty cycle: 100% continuous
Insulation: Class H, 180°C
Coil protection: IP68
Overall protection with connector: IP67
Electrical connection: DIN43650A
The WPG2 coil is UL and CSA approved and is supplied with an IP67 DIN connector.
Voltage Options
DC:
✓ 12VDC
✓ 24VDC
✓ 48VDC
AC 50/60Hz:
✓ 24VAC
✓ 48VAC
✓ 110VAC
✓ 230VAC
✓ 380VAC
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
When fitted with the ATEX / IECEx operator, maximum operating pressure is reduced to 3 Bar.
The ATEX / IECEx certification relates to the explosion-protected solenoid operator rather than automatically certifying the complete stainless steel valve assembly.
Additional Options
✓ Manual override
✓ Top lift-and-turn override
✓ Bottom-entry T-bar override
✓ Silver shading ring
✓ Degreased configuration
✓ Alternative seal materials
✓ ANSI150Lb flange
✓ JIS10K flange
✓ Custom-made configurations
Typical Applications
✓ Industrial water systems
✓ Compressed air systems
✓ Vacuum systems
✓ Process automation
✓ RO and pure water systems
✓ Chemical processing equipment
✓ Inert gas systems
✓ Industrial machinery
✓ Cooling systems
✓ OEM process equipment
Zero-Rated Stainless Steel Flow Control
The ADS20PF combines 316 stainless steel construction, PN16 flanged connections and zero-rated assisted-lift operation in a robust DN20 industrial solenoid valve.
Unlike conventional pilot-operated valves requiring a minimum differential pressure, the ADS20PF operates from 0 Bar, making it suitable for low-pressure systems and installations where differential pressure can fall close to zero.
Its alternative flange standards, extensive seal selection, silver shading-ring option and degreasing option allow the valve to be configured for a wide variety of industrial process applications.
Ordering Information
ADS20PF + Seal + Voltage
Specify:
✓ Required voltage
✓ Required seal material
✓ PN16, ANSI150Lb or JIS10K
✓ Standard or ATEX/IECEx operator
✓ Copper or silver shading ring
✓ Manual override if required
✓ Degreasing if required
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