Asco Solenoid Valves

Actuation Valve are the leading suppliers of Asco Solenoid Valves in the UK. Asco Numatics offer a comprehensive range of fluid power, control and pneumatic solutions for a wide range of industries and applications. Many years of process expertise and experience has lead to industry-leading innovations which has, in turn, enabled Asco to offer an unrivalled amount availability, reliability and cost-effective solutions with over 50,000 Solenoid Valves within the range.

Brass Solenoid Valves

Asco brass solenoid valves cover a wide range of industries and applications from lower pressure water or air to high pressure steam and are available wtih different end connections to suit pipeline your requirements. Seat materials such as EPDM, Viton & NBR ensure compatability with your flow medium. Most popular series include 238, 210, 222, 256 & 356.

Size Range: 1/8" - 2.5"
Function: 2/2 Normally Closed, 2/2 Normally Open, 3/2 Normally Closed
Operation: Direct Acting, Pilot Operated, Proportional
Voltages: 24VDC, 24VAC, 110VAC, 230VAC, 12VDC, 48VDC
Applications: Water, Drinking Water, Air, Natural Gas, Inert Gas, Oil, Steam
End Connections: BSPP, NPT, Compression, Push Fit
Pressure Rating: 0-55 Bar
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Stainless Steel Solenoid Valves

Stainless Steel Asco solenoid valves are the perfect solution for environments that may be considered harsh or corrosive and offer a higher level of protection to that of the brass valve. Seat materials such as EPDM, Viton & NBR ensure compatability with your flow medium. Most popular series include 256, 262, 551, 320 & 314.

Size Range: 1/8" - 1.5"
Function: 2/2 Normally Closed, 2/2 Normally Open, 3/2 Normally Closed
Operation: Direct Acting, Pilot Operated, Mor
Voltages: 24VDC, 24VAC, 110VAC, 230VAC, 12VDC, 48VDC
Applications: Water, Drinking Water, Air, Natural Gas, Inert Gas, Oil, Steam
End Connections: BSPP, NPT, Compression, Push Fit
Pressure Rating: 0-150 Bar
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Light Alloy Solenoid Valves

ASCO light alloy (Aluminium) solenoid valves range from 2/2 solenoid valves, both normally closed or normally open, to Pulse valves specifically designed to back-blast filter cartridges clean of dirt & dust. A range of multi-function spool valves are also made from light alloy providing a rugged, yet lightweight valve solution. Popular ranges include 040, 215, 353, 551 & 553 Series. Please see below additional specification briefs or click through to the individual product filtering.

Size Range: 1/8" - 3"
Body Materials: 2/2 Normally Closed, 2/2 Normally Open, 3/2 Remote, 5/2 Remote, 3/2-5/2 Namur, 5/3
Operation: Direct Acting, Pilot Operated, Remote Pilot Operated
Voltages: 24VDC, 24VAC, 110VAC, 230VAC, 12VDC, 48VDC
Applications: Air, Natural Gas, Inert Gas
End Connections: BSPP, NPT, Clamp
Pressure Rating: 0-10 Bar (2-10 Bar 551 & 553 Series)
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Engineered Plastic Solenoid Valves

ASCO engineered plastic valves are similar in principal to the well established 320 series but offer the extra added benefit of material suitability for potentially corrosive or hazardous environments. Available as 3/2 Normally Closed or 3/2 Normally Open and available in ¼” ports with compression ends suitable for plastic or metal tubing. Common uses include dispensing, analytical water applications & even diagnostic equipment.

Size Range: 1/4"
Function: 3/2 Normally Closed, 3/2 Normally Open
Operation: Direct Acting
Voltages: 24VAC, 110VAC, 120VAC, 440VAC, 6VDC, 12VDC, 24VDC, 48VDC, 120VDC, 240VAC
Applications Air, Inert Gas, Water
End Connections: Compression Ends
Pressure Rating: Vacuum To 10 Bar
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Steam Service Solenoid Valves

ASCO Steam solenoid valves cover a range of pressures and temperatures within the Superheated Steam, Saturated Steam and hot water applications. Max temp of +186°C can be catered for with the ASCO Steam solenoid valve range, as well as some for slightly easier duties at max temperature requirements of 150°C. Steam valves include 222, 262, 240 & 220 Series.

Size Range: 1/4" - 2"
Function: 2/2 Normally Closed
Operation: Direct Acting, Pilot Operated - Floating Piston
Voltages: 24VAC, 115VAC, 24VDC, 48VDC
Applications: Hot Water, Steam
End Connections: Screwed BSPT
Pressure Rating: 0.3 - 10 Bar
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Namur Mount Solenoid Valves

ASCO Namur (VDI/VDE 3845, ISO 5211) mounted valves directly mount to any Namur interface of the correct size, allowing air piloting local to the pneumatic device being operated, very commonly pneumatic actuators or pneumatic cylinders. Air is controlled through a Namur plate which is the direct interface between pilot valve and pneumatic actuator or air-operated valve. The ASCO E290 air-operated angle seat valve can be supplied with Namur plate adaptor to accept a Namur type 551/327 type solenoid valve. Body materials available are Aluminium, Brass & Stainless Steel.

Size Range: 1/4" - 1/2"
Function: 3/2 Normally Closed, 5/2 Spring Return, 5/3 W1 & W3 Namur, Air, Lever, Foot Operated
Operation: Pilot Operated
Voltages: 24VAC, 24VAC, 115VAC, 24VDC, 48VD
Applications: Compressed Air
End Connections: BSPP, NPT
Pressure Rating: 0-10 Bar (327), 2 - 10 Bar (551, 553)
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Cryogenic Service Solenoid Valves

ASCO Cryogenic solenoid valves are created to deal with the harsh temperatures of cryogenic fluids that reach extreme sub-zero levels. Liquid Oxygen (-183°C), liquid Argon (-186°C) & liquid Nitrogen, the most demanding service which can reach (-196°C), can all be controlled by one of our cryogenic solenoid valves. The 264 series is specifically designed for the high pressures of bottle discharge with a max pressure capability of 70 Bar and temps of (-60°C).

Size Range: 1/8" - 3/4"
Function: 2/2 Normally Closed
Operation: Direct Acting
Voltages: 24VAC, 110VAC, 230VAC, 24VDC, 12VDC
Applications: Liquid Oxygen (-183°C), Liquid Argon (-186°C), Liquid Nitrogen (-196°C)
End Connections: BSPP, NPT
Pressure Rating: 0-9 Bar (263, 222 Series), (0-70 Bar 264 Series Co²)
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General Purpose Solenoid Valves

General purpose valves cover an enormous range of basic applications. If you want to simply control water, air, or inert Gas, this range of valves will have you covered. Brass and Stainless Steel body materials are available, as well as a varied selection of seal / diaphragm materials depending on media & application. Normally closed valves can be used in any fail safe applications, meaning that in the event of power failure, the solenoid valves will spring closed. Normally-open valves are also available to cater to the rare instance a pipeline needs to stay open in the event of loss of power. Some basic 3/2 valves are included in the general purpose range of ASCO valves and these can allow for piloting, diverting & mixing applications. Different seal & diaphragm materials are available to suit your application, but the standard elastomer offered on most of the standard valve ranges is NBR. The Asco Solenoid Valve general purpose range inlcudes the 238, 210, 262, 256, 356 & 320.

Size Range: 1/8" - 2"
Function: 2/2 Normally Closed, 2/2 Normally Open, 3/2 Normally Closed, 3/2 Normally Open, 3/2 Universal
Operation: Direct Acting, Pilot Operated
Voltages: 24VAC, 110VAC, 230VAC, 48VAC, 24VDC, 48VDC, 115VAC
Applications: Natural Gas, Inert Gas
End Connections: BSPP, NPT, Clamp
Pressure Rating: 0-140 Bar (262 Series 1/8” AC Only) 0-9/10 Bar (Most General Purpose Valves)
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Gas EN 161 Solenoid Valves

ASCO Gas solenoid valves are available as 2/2 solenoid valves with a normally-closed function. Basically, these operate as a small Gas safety valve and will close in the event of power failure. The 040 & 215 series of Gas valves are made from Aluminium, while the 030 & 262 series are available with a Brass body. Most of the Gas valves have a very low pressure capability, so please advise system pressures when enquiring. Asco Gas Valve Series includes 262, 030, 040, 215, 043, 044 & E290 with EG Prefix.

Size Range: 1/8" - 1"
Function: 2/2 Normally Closed
Operation: Direct Acting, Pilot Operated
Voltages: 24VAC, 110VAC, 230VAC
Applications: Natural Gas, Inert Gas
End Connections: BSP
Pressure Rating: 0-1 Bar (040 Series), 2.76 Bar (262 Series), 480mBar (030 Series)
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Heavy Fuel Oil Solenoid Valves

ASCO offer the 266 range of direct-operated, lever-type solenoid valves specifically for use with Heavy fuel oils. These come in two different construction types depending on specific application: FPM Soft seals as well as metal-to-metal seats are available, depending on media. ATEX solenoid coils available if the valve needs to operate in a hazardous area. The valves are made for use on fuel oil grade 2 & 4 as well as fuel oil grade 5 & 6 (heated).

Size Range: 3/8" - 3/4"
Function: 2/2 Normally Closed, 2/2 NC (3 Port Version - One Bypass Port)
Operation: Direct Acting
Voltages: 24VAC, 48VAC, 115VAC, 230VAC
Applications: Heavy Fuel Oil, (Maximum Viscosity: 10 - 640 cSt (MM2/S)
End Connections: BSPP, NPT, Clamp
Pressure Rating: 0-45 Bar
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Hot Water Service Solenoid Valves

Many ranges of ASCO valve can cope with hot water duty, but depending on how hot the maximum temperature gets,the specific valve model to be chosen varies. Standard NBR seals can cope with water temps up to +85°C. EPDM increases the maximum temperature capability up to 150°C (3/8" to 3/4") & 130°C (1" to 1½"). Anything hotter and the Steam valve ranges should be used instead. Hot Water Valves include 238, 222, 210 & 220 Series.

Size Range: 3/8" - 1 1/2"
Function: 2/2 Normally Closed
Operation: Direct Acting
Voltages: 24VAC, 48VAC, 115VAC, 230VAC
Applications: Warm Water, Hot Water
End Connections: BSPT
Pressure Rating: 0-3.5 Bar Steam @ 150°C (3/8" - 3/4"), 0-2 Bar Steam @ 130°C (1" - 1½") or 0-9 Bar Water
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Vacuum Service Solenoid Valves

Within the ASCO portfolio are valves suitable for use on Vacuum. This covers a large range of pipe sizes as well as different materials of construction; Brass, Aluminium & Stainless Steel are all available. These vacuum solenoid valves come in 3 different types depending on absolute vacuum range: Low vacuum, medium vacuum (With suffix VM) & high vacuum range (Using suffix VH). Asco Solenoid Valves Vacuum Series Valves include 262, 215, 030, 210, 287 & 387.

Size Range: 1/4" - 3"
Function: 2/2 Normally Closed, 2/2 Normally Open
Operation: Direct Acting, Pilot Operated
Voltages: 24VDC, 24VAC, 110VAC, 230VAC, 12VDC, 48VDC
Applications: Air, Natural Gas, Inert Gas
End Connections: BSPP, BSPT, NPT, Weld, Clamp
Pressure Rating: 1.33.10(-6) mBar Min. 10 (-6) Torr
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Wras Approved Solenoid Valves

These solenoid valves carry WRAS (Water Regulations Advisory Scheme) approval for use on potable / drinking water. If you are in the building trade or even a plumber, most domestic water pipeline installations will most likely require a WRAS approved valve. The ASCO ranges available span across a few different valve types, chosen depending on specific applications. There are some specialist valves available with WRAS approval and latching DC coils, for use with a battery-powered auto-flush sensor (See WC Flushing Service Solenoid Valves). Wras Valve Series 210BM, 262BW, L133D, L160P03, L182D, L182D-BIG, L282D, L282D-BIG.

Size Range: 3/8” BSP - 2” BSP, 3/8”NPT - 2” NPT, 15MM
Function: 2/2 Normally Closed, 2/2 Normally Open
Operation: Direct Acting, In-Direct Acting, Pilot Operated
Voltages: 24VDC, 12VDC, 9VDC, 6VDC, 3VDC, 230VAC, 115V AC, 24V AC
Applications: Water (Potable Drinking Water)
End Connections: BSP, NPT, 15MM Compression Ends
Pressure Rating: 0-10 Bar, 0.5-10 Bar.
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WC Flushing Service Solenoid Valves

These are commonly found assisting the automatic flush of urinals & toilets in public buildings such as schools, pubs and restaurants in conjunction with a timer controller. Some are available in very low battery voltages and feature a latching coil for power saving. These valves can also be used in simple systems such as touchless taps, driven by a signal from a PIR sensor. Both the 262 & 210 series of these valves can be specified with 15mm compression fittings so most plumbers can install with minimal hassle.

Size Range: 15MM
Function: 2/2 Normally Closed
Operation: Direct Acting
Voltages: 24VDC, 12VDC, 9VDC, 6VDC, 3VDC
Applications: Water
End Connections: 15MM Compression Ends
Pressure Rating: 0-10 Bar
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Solenoid Valves Basic Function

A solenoid valve is a combination of two basic functional units. A solenoid (electromagnet) with its plunger (core) & a valve containing an orifice, in which a disk is positioned, either to allow or to prevent the flow of the medium being controlled. In the main, solenoid valves are covered by the follow­ing types of operation. Direct Acting Solenoid Valves, Pilot Operated Solenoid Valves & External Pilot Operated Solenoid Valves. This valve is usually of diaphragm or piston operated construction, equipped with a three-way sole­noid pilot valve. The pilot valve alternatively applies pressure to or exhausts pressure from the diaphragm or piston for the operation of the main valve.

The simple two-way valves briefly described above form the majority of solenoid valves used in the industry. Other more complex types in use include three-way and four-way valves, manually and electrically reset valves and a wide variety of special valves. 

We recognise the importance of safety, reliability and availability in the automation of process valves and have positioned ourselves favourably to be able to offer an extensive scope of supply from stock for all of our Actuated Valves. Incorporating Safe Area IP65, Intrinsically Safe & Explosion Proof designs from the 551 series of Asco Solenoid Valves we can cover all bases of specification.

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Pilot Operated Solenoid Valves

This type of valve incorporates a pilot and bleed orifice and utilizes the line pressure for opera­tion. When the solenoid is energized the pilot orifice is opened and pressure is released from the top of the diaphragm to the outlet side of the valve. This results in an unbalanced condition which causes the line pressure to lift the diaphragm and open the main orifice. When the solenoid is de-energized the pilot orifice is closed and full line pressure is applied to the top of the diaphragm via the bleed orifice, thereby providing a seating force to close the main orifice. 

External Pilot Operated Solenoid Valve

Line pressure or a separate source of pressure can be utilized to operate the pilot valve. All of our Namur Asco Solenoid Valves are available for 3/2 Spring Return & 5/2 Double Acting Actuators and come complete with Manual Override, avoiding any complications that may arise from any on site power failures. Pressure ranges are suitable for 2-10 Bar Filtered, Lubricated/Non-Lubricated and Dry Compressed Air for the SCG551A001MS, LISC551B201 & NFETG551B301SL. Anodized Aluminium Bodies complete the design features with NBR & Polyurethane Seals accommodating temperature ranges of -25 to 60 DegC. 

Asco Solenoid Valves

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