ASCO 320 Pilot Valves – Solenoid Direct Operated 3/2 Way Valve In Line

ASCO 320 Pilot Valves – Direct Acting/Operating Solenoid Valves For Hazardous Areas & Potentially Explosive Atmospheres
ASCO 320 hazardous area solenoid valves are direct acting/operating type pilot valves suitable for hazardous areas installation with international classifications including ATEX, UL, CSA and other local approvals on request.
ASCO 320 pilot valves are available in brass or stainless steel.
3/2 ” Way Solenoid Valve
U – Universal
NC – Normally Closed Valve
NO – Normally Open Valve
Via ASCO Numatics FASTSHIP and SAMEDAY Express Delivery Service we are able to deliver 2,000+ ASCO valves from stock direct to you, this includes ASCO 320 pilot valves.
T&D are an Authorised UK Distributor for ASCO Numatics, part of Emerson Industrial Automation.
ASCO 320 Pilot Valves
- Three way solenoid valves with orifice and pipe connections in valve body
- Pilot valves are designed to handle relatively high pressure 3-way applications
- ASCO 320 solenoid valves do not require a minimum operating pressure
- ASCO 320 valve conforms to all relevant EC directives
Differential Pressure : 0 – 55 bar [1 bar = 100kPa]
Maximum Viscosity : 65cST (mm2 /s)
Response Time : 5 – 25 ms
Fluids | Temperature Range (TS) | Valve Seal Materials |
Air, Inert Gas, Water, Oil | -20 to + 90°C | NBR Nitrile |
-20 to + 40°C | UR (urethane) |
ASCO 320 – valve FLUID CONTACT COMPATIBILITY
ASCO 320 Solenoid Valve | Brass Valve Body | Stainless Steel Valve Body |
Body and seat | Brass | AISI 303 SS |
Core tube | Stainless Steel | Stainless Steel |
Core and plugnut | Stainless Steel | Stainless Steel |
Springs | Stainless steel | Stainless Steel |
Sealings | NBR | NBR |
Discs | NBR or UR | NBR |
Disc holder and core guide | CA | CA |
Shading coil | Copper | Silver |
ASCO 320 – valve ELECTRICAL CHARACTERISTICS
Valve Coil Insulation Class : F
Electrical Safety : IEC 335
Standard Valve Voltages : DC (=) : 24V – 48V
AC (~) 24V – 48V – 115V – 230V/50Hz; other voltages and 60Hz are available on request
ASCO 320 – SOLENOID VALVE SPECIFICATIONS
Pipe Size | Orifice Size | Power level BP | Flow Coefficient kV | Operating Pressure Differential (Bar) | ASCO Solenoid Valve Catalogue Number | ||||||||
min. | max. (PS) | ||||||||||||
Air/Water (*) | Brass Pilot Valve | Stainless Steel Pilot Valve | |||||||||||
NPT | (mm) | ~/= | (M3/h) | (l/min) | ~ | =~= | |||||||
U – Universal | |||||||||||||
1/4″ | 0.8 | 16.7/11.2 | 0.02 | 0.3 | 0 | 27 | 19 | ASCO B320A170 (1) | – | ||||
1.6 | 10.5/11.2 | 0.08 | 1.3 | 0 | 9 | 5 | ASCO B320A172 | – | |||||
2.4 | 16.7/11.2 | 0.10 | 1.7 | 0 | 7 | 4 | ASCO B320B174 | ASCO B320A200 | |||||
NC – Normally Closed Valve | |||||||||||||
1/4″ | 0.8 | 16.7/11.2 | 0.02 | 0.3 | 0 | 50 | 35 | ASCO B320A180 (1) | – | ||||
1.6 | 16.7/11.2 | 0.08 | 1.3 | 0 | 15 | 11 | ASCO B320A182 | – | |||||
2.4 | 10.5/11.2 | 0.10 | 1.7 | 0 | 10 | 8 | ASCO B320A184 | ASCO B320A202 | |||||
3.2 | 10.5/11.2 | 0.21 | 3.5 | 6 | 4 | ASCO B320A186 | ASCO B320A203 | ||||||
NO – Normally Open Valve | |||||||||||||
1/4″ | 0.8 | 16.7/11.2 | 0.02 | 0.3 | 0 | 55 | 40 | ASCO B320A190 (1) | – | ||||
1.6 | 16.7/11.2 | 0.08 | 1.3 | 0 | 17 | 11 | ASCO B320A192 | – | |||||
2.4 | 10.5/11.2 | 0.10 | 1.7 | 0 | 10 | 7 | ASCO B320A194 | ASCO B320A204 | |||||
3.2 | 10.5/11.2 | 0.21 | 3.5 | 0 | 5 | 4 | ASCO B320A196 | ASCO B320A205 |
ASCO 320 – SOLENOID VALVE OPTIONS
Ex mb (prefix “PV”) execution can be supplied in various cable lengths.
Solenoid valves compliant with “UL”, “CSA” and other local approvals available on request.
1/2″ NPT (prefix “T”) and M20 x 1,5 (prefix “ET”) conduits (aluminium or 316 SS) available for steel solenoid housing.
Special moulded-in solid state components for peak voltage suppression and/or rectification (four diode bridge).
ASCO 320 pilot valves mounting brackets for brass body valves, suffix MB.
ASCO SOLENOID VALVES – ATEX, IEC EX & NEMA hazardous area CERTIFIED

ASCO Solenoid Valves For Hazardous Area Oil, Gas & Petrochem Industries (ATEX & IECEx) – call T&D for sales, technical and specification support on all ASCO valves.
Image : Energy Reality - A Project of Post Carbon Institute.
Hazardous Area Certification
ATEX (Zone 1 Zone 2), IEC Ex, NEMA (Div 1 Div 2) & Explosion Protection

T&D – International Suppliers of Electrical, Mechanical, Process & Instrumentation Equipment : The Explosion & Flameproof Specialists.
➡ Did you know? T&D distribute FLEXIM flowmeters with clamp-on ultrasonic design and ATEX, IECEx and FM Certification for hazardous area and offshore flow metering of liquids, gases and compressed air.