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ASCO 2-Way Solenoid Valves:


ASCO’s 2-Way solenoid valves have one inlet and one outlet, and are used to permit and shut off fluid flow. The two types of operations are Normally Closed (NC) and Normally Open (NO). Two types of constructions apply to 2-way solenoid valves, which are direct acting and internally piloted.

With Direct acting constructions, the solenoid is energized, the core directly opens the orifice of a Normally Closed valve or closes the orifice in a Normally Open Valve. The valve will operate at pressures from 0 psi to its rated maximum.

Internally piloted constructions use line pressure to assist operation. When the coil is de-energized (on a Normally Closed Valve), the pilot orifice is closed and line pressure is applied to the top of the piston or diaphragm through the bleed orifice, closing the valve.


ASCO’s line of 2-way solenoid valves include General Service, Hot Water/ Steam, Potable Water and Food Service, Vacuum, Cryogenic and Liquid C02, Air Operated, Proportional, Intrinsically Safe, Low Power, Isolation/ Shielded Core, Long Life / Quiet, Ammonia, Dry Air, Magnetic Latching and Medical/ Analytical. Select a product below to learn more.




3-Way Solenoid Valves


These valves have three pipe connections and two orifices. When one orifice is open, the other is closed and vice versa. They are commonly used to alternately apply pressure to an exhaust pressure from a valve actuator or a single acting cylinder. These valves can be normally closed, normally open or universal.



4-Way Solenoid Valves


These valves have four or five pipe connections, commonly called ports. One pressure inlet, two cylinder ports providing pressure to the double acting cylinder or actuator and one or two outlets to exhaust pressure from the cylinders. They have three types of construction, single solenoid, dual solenoid or single air operator



Direct Mount ASCO Valves


Direct Mount ASCO valves are standard 3-way and 4-way solenoid valves whose NPT pipe connections and mounting configurations have been replaced by NAMUR mounting configuration. This allows each valve to be mounted directly to an actuator without the use of hard piping or tubing.



ASCO Valve Dust Collector Valves

The ASCO Valve Dust Collecotr Series are high-flow fast-opening 2-way valves, pilot valves, pilot valve enclosures, and bulkhead fittings that have been specially designed for use in dust collector systems.
8257 Series
ASCO Pilot Valve 8257 Series Dust Collector
The 8257 Series is a 2-way pilot valve used for operating dust collector valves.



Main Pulse Valves

ASCO Main Pulse Dust Collector Valves
The 8353 Series is a 2-way dust collector valve used for pulsing large volumes of air into filter bags for particulate removal.
Power Pulse Valves Power Pulse Dust Collector Valves The Power Pulse Series is a 2-way pulse valve that features a piston cartridge for longer life and quick mount connection.
Bulkhead Fittings
Bulkhead Fittings for Dust Collector Valves
The Bulkhead Fittings are installed through the dust collector wall, secured with a gasket and retaining ring.
Pilot Valve Enclosures Pilot Enclosures Boxes Dust Collector Valves
Corrosion resistant, cast aluminum enclosures that provide protection for pre-wired ASCO remote pilot valves.

Sequential Controller Sequential Controller Dust Collector Valves The sequential controller is designed to operate the ASCO pilot valves used on dust collector equipment.


Group Mounted


These series are 2-way, 3-way and 4-way 2-position valves that are designed for gang mounting into different quantities of valves. Any combination of normally closed, normally open or universal valves may be grouped together.



Manual Reset Valves


These series are standard 2-way, 3-way and 4-way 2-position valves that use a manual reset assembly in replacement of the solenoid. They are designed to prevent inadvertent valve startup in their designed failure modes. These series are available in no voltage release, electrically tripped, and free handle constructions as well as latched open or latched closed for 2-way valves




ASCO Miniature Valves


ASCO Miniature Valve products include a complete line of general service, isolation, pinch, proportional valves, and manifold assemblies for your fluid control requirements. ASCO miniature valves are utilized for the precise and reliable control of liquids and gases in medical equipment, analytical instrumentation, and industrial applications.

ASCO Miniature Valve Products are assembled and 100% factory tested in an ISO Class 8 equivalent cleanroom.

In addition to our comprehensive catalog product offering, ASCO has the ability to create customized assemblies. Whether you need a minor modification of a catalog product or a complete flow control solution, ASCO’s trained sales and engineering teams are ready to assist.


General Service Valves

ASCO General Service Valves control the flow of neutral gases. They are known for their long life and fast response time. ASCO General Services Valves are available in multiple mounting configurations.




ASCO Valve Isolation Valves

Isolation Valves
ASCO Isolation Valves control the flow of neutral and aggressive fluids. They key design characteristic of an isolation valve is to isolate the fluid from the solenoid, which is crucial for applications requiring high fluid purity and low dead volume.




ASCO Valve Pinch Valves

Pinch Valves
ASCO Pinch Valves provide the ability to control the flow of a fluid through an uninterrupted flow path. The fluid stays in its original supply tube and is controlled by the opening and closing “pinch” of the valve. Because the fluid never leaves the supply tube there is zero dead volume and no cross-contamination risk.



ASCO Valve Proportional Valves


Proportional Valves
ASCO Proportional Valves control the flow of neutral fluids. By varying the input current you can precisely adjust the valve’s flow rate. This eliminates the need for a variable flow system to contain multiple valves with different flow rates.




ASCO Valve Manifold Assemblies

Manifold Assemblies

ASCO offers complete manifold assemblies utilizing our 411 and RB Series valves. These assemblies consist of the valves mounted onto any anodized aluminum manifold and 100% factory tested. They are available in a single station manifold up to 12 station assembly standard.
ASCO Miniature Valve Options and Accessories
Miniature Valve Accessories
ASCO offers a variety of accessories including fittings, tubing, and electrical connectors tailored specifically for our miniature valve products.



ASCO Valve Options and Accessories


ASCO offers a wide variety of accessories and optional features to meet your specific application requirements including accessories tailored specifically for our Miniature General Service, Isolation, Proportional and Pinch Valves.

Electronically Enhanced Solenoid Valves
The RedHat Next Generation revolutionary new power management technology sets new industry standards for reliability and power consumption. The new line of solenoid valves accepts both AC and DC voltages while improving performance. These 2-way, 3-way and 4-way solenoid valves are designed to handle most fluid control applications.
Now available with Class I, Division 2 approvals
Increase in DC pressure ratings to AC levels on all products (up to 500% improvement).
Lower power operation (2-watt solenoid delivers the same performance as a traditional 17-watt AC solenoid).
Voltage ranging provides standard solutions to special voltage requirements, such as global usage, voltage fluctuations, and specialty applications.
Built in surge suppression eliminates the need for a separate surge suppression diode.
Elimination of AC hum.
2-Way One inlet and one outlet, and are used to permit and shut off fluid flow. The two types of operations are “Normally Closed” and “Normally Open”.
3-Way These valves have three pipe connections and two orifices. When one orifice is open, the other is closed and vice versa. They’re commonly used to alternately apply pressure to, and exhaust pressure from, a valve actuator or a single acting cylinder. These valves can be normally closed, normally open or universal.
4-Way These valves have four or five pipe connections, commonly called ports. One pressure inlet, two cylinder ports providing pressure to a double acting cylinder or actuator, and one or two outlets to exhaust pressure from the cylinders.

Valve Automation for the Process Industry

Pilot Valves, Pilot Valve Systems and Position Indicators
ASCO Valve Automation for the Process Industry
3-Way Valves – Valves for use with spring return actuators. Pipe Connection: 1/8” through 1” threaded connections. NAMUR: Padmount valves to the NAMUR standards.
4-Way Valves – Valves used with non spring return actuators. Pipe Connection: 1/8” through 1” threaded connections. NAMUR: Padmount valves to the NAMUR standards.
Spool Valves – Valves used in control/safety panels and valve automation systems.
8290 Actuated Globe Valve Assembly – ASCO’s 2-way piston operated process valve assembly with HS series position indicator, and solenoid pilot valve. A cost effective alternative to an actuated ball valve assembly, this linear on/off valve is your stand alone solution that can be used in a variety of applications. Versatile, proven, and reliable, the 8290 series process valve is available in Bronze or Stainless Steel. All components are backed and manufactured by ASCO.
ATEX Approved Pilot Valves – ASCO is committed to serving the global process market and is now manufacturing ATEX approved pilot valves. These pilot valves are used on process control equipment located in hazardous areas that are required to comply with the ATEX 94/9/EC directive.
Functional Safety Solutions – ASCO solenoid pilot valves are an integral part of the final control element for any safety instrumented system (SIS) or critical application. ASCO offers 3 solenoid pilot valve solutions that are widely used in the process control industry; individual 3-way pilot valves, manual reset valves, and redundant pilot valve systems. Each of these solutions are proven in use as a pilot valve in critical applications and in safety instrumented systems. Certified pilot valves per IEC 61508 Parts 1 and 2 are rated SIL 3 capable for domestic and international markets (ATEX). ASCO understands the need to keep your process running, but also understands that the process must shut down when commanded.
Pneumatic and Air Preparation Valves

ASCO offers a wide variety of Compressed Air Treatment Products including Filters, Regulators, Lubricators, Emergency Shut-Off / Soft-Start Valves, and Accessories. Our broad line of high flow, modular, and in-line products include sizes from 1/8″ – 1″ and offer the performance and flexibility to meet today’s demanding applications.
Filters, Regulators and Lubricators ASCO’s dynamic Modulair 100 Series offers all the control, flexibility and performance you need from your air preparation equipment. The components of the Mod 100 Series can be installed separately or can be assembled into a complete unit, as you require.
• Totally modular system
• Precise regulation and control
• Large bowl capacities
• Ambient Temperature Range: 32ºF to 120ºF (0ºC to 49ºC)
Valves The complete line of 2, 3, and 4-way Air Piloted and Solenoid Operated Directional Control Valves encompasses sizes from 10-32 to 1” and flows from 0.02 Cv thru 7.0 Cv. A variety of options and accessories are available such as Manifolding; Integrated Flow Controls, Regulators, and Tube Fittings; DIN Rail Mounting. From Poppet Valves to Spool Valves, these products are designed for years of reliable long-life.
Actuators Our comprehensive range of linear and rotary actuators have a long history of reliable service in the most demanding automation applications worldwide. ASCO/Joucomatic manufactures cylinders to meet ISO/CETOP and ISO/VDMA standards as well as miniature cylinders, NFPA cylinders, rod-less cylinders and guided cylinders.

ASCO Fuel, Gas & Oil Products

ASCO provides the broadest line of solenoid & motorized shutoff valves designed to control the flow of fuel gas, liquid propane and all grades of fuel oil used in combustion applications such as: industrial furnaces, ovens, kilns, incinerators, burners and boilers.
8214 Fuel Gas Oil
Modular Gas ShutOff Valves – The new 2-way normally closed modular valve allows the combination of the 8214(200) solenoid valve with the V710(B) & AH(E) electro-hydraulic motorized valve. This compact double valve design is ideal for boilers, furnaces, ovens, kilns, heating equipment, and gas generators used in commercial and industrial applications. Optional NPT threaded flange adapters are available for ease of installation and serviceability. All valves have leading agency approvals and are available in pipe connections from 3/4’’ to 3’’.
Solenoid Valves – Solenoid operated valves handling combustion system pilot & main line fuel shutoff & control needs. These valves are available in 2-way normally closed, normally open, manual reset, and 3-way diversion. ASCO valves are available in brass, aluminum, and stainless steel. Features include junction box, pipe taps, visual indication, proof of closure, leading agency approvals, and pipe connections from 1/8” to 3”. Most valves are rated for -40ºF service for outdoor installation in frigid climates.
Motorized Valves – Electro-hydraulic motor operated valves are designed to handle your combustion system needs. These valves are available in 2-way normally closed and 3-way diversion. ASCO valves are available in bronze, aluminum, and cast iron. Features include pipe taps, visual indication, proof of closure, leading agency approvals, and pipe connections from 3/4” to 6”. Most valves are rated for -40ºF service for outdoor installation in frigid climates.

Sensors and Pressure/Temperature Switches

Devices for pressure and temperature measurement.
Pressure Sensors ASCO pressure sensors provide accurate measuring and linear electrical output signals for many process fluids. The MEMs based sensor and one-piece pressure cavity provides stable output measurements from 0 to 10,000 psi and supplies high sensitivity, low drift and highly repeatable signaling. Electrical options include flying leads, pins, spade terminals, or explosion-proof or intrinsically safe versions. Mechanical options include panel mounting, 316ss pressure vessel or inconel with process connections of 1/8-1/2 inch NPT, and other specialty threading. Output signal options include 4-20m Amp or 1-5 Volt.
Pressure and Temperature Switches ASCO pressure and temperature switches are a range of miniature to industrial size switches designed to signal when process media reaches a set point of pressure or temperature. The transducer will operate a mechanical snap switch when the set point has been reached, and will reset when the process media conditions drop below the dead band. Options include fixed or adjustable dead band and a a wide range of set points of vacuum to 8000 psi and temperatures of -60ºF to 640ºF (-51ºC to 337ºC).
Proportional Valves

ASCO has emerged as a leader with the most complete line of Proportional Valve Products that provide fast response and consistent control of pressure and flow. Many industrial applications such as web tensioning, ultrasonic welding, positioning, fluid coating, and laser cutting demand accurate control of pressure and flow. Companies worldwide rely on ASCO for these critical applications.
Posiflow Proportional Solenoid Valves
8202/ 8203
Series Flow rates adjustable between 0% and 100% of rating. Control achieved by applying straight voltage between 0 and 24 VDC via potentiometer or other variable power supply. Flow rate can also be regulated by a range of electrical inputs (sensors, transmitters, PLC, etc.) via an ASCO Electronic Control Unit or similar circuit. Suitable for use in air/gas, low vacuum service, as well as to precisely control flow of water.
Navy/Marine Solenoid and Air Operated Valves

ASCO has many years of experience in supplying valves to meet the exacting standards of the U.S. Navy and Coast Guard. All of the valves listed have been approved for Grade A, Type 1 Hi-Shock requirements per MIL-S-901. The valves described are a sampling of the designs available meeting Navy specifications.
ASCO Valve Nuclear Products Qualified to IEEE Specifications

ASCO, the pioneer and leader in the design and development of solenoid operated valves for the nuclear industry, offers a complete line of nuclear qualified products. Our engineering experience and stringent quality standards make every ASCO valve a high quality engineered product. ASCO nuclear products are 100% inspected and functionally tested prior to shipment in order to insure that they meet the rigorous demands and high expectations of the nuclear industry.

Check Valves ASCO Check Valves Compact, in-line mounted, instantaneous shutoff against reverse flow, low forward pressure opening.
Din Connector ASCO Din Connector Designed using the DIN 43650 form standards consistent with our solenoid valve coil designs and permitting industry interchangeability. Available for user wiring, or factory pre-wired installations.
Electronic Timers ASCO Electronic Timers Solid state electronic timer used to automatically control ASCO solenoid valves.
Explosion Proof Junction Box ASCO Explosion Proof Junction Box Used in Division I areas for field wiring of explosion proof solenoid valves.
Flow Controls ASCO Flo Controls Spring loaded disc allows free flow in one direction and an adjustable flow in the other.
316L Stainless Steel Filter and Regulator

Design features a heavy duty 316L stainless steel construction, suitable for use in harsh environments, including oil and gas exploration, transmission and refining, water and waste water treatment, and chemical.

FRLs Filters, Regulators and Lubricators FRL Filters, Regulators and Lubricators. Totally modular system, precise regulation and control and large bowl capacity.
Miniature Fittings ASCO Miniature Fittings To connect our Micro-Miniature line of General Service and Isolation valves.
Pinch Valve Tubing and Accessories ASCO Miniature Electrical Connectors Special silicone tubing and hose guides for use with our Pinch valves.
Slip-Lok Connectors ASCO Slip-Lok Connectors For attaching conduit and instruments.
Strainers ASCO Strainers Should be used whenever is essential that fluid be free of foreign solid matter. Assures proper flow and prevents damage to valves, controls and other equipment.
Quick Exhaust Valves ASCO Quick Exhaust Valves Compact 3-ported valves have oversized orifice for quick exhaust of cylinders, brakes, actuators, clutches, etc.
Solenoid Valve Optional Features ASCO offers a wide range of electrical and mechanical options which can customize valves to your precise application.
Engineering Information and Approvals

This section provides additional information which may be necessary to determine the exact ASCO solenoid or air operated valve for your requirements.
ASCO Valve Product Configurators

Design your ASCO Valve now. ASCO’s product configurators allow you to quickly build a valve to meet your specific requirements. List price, product availability, 3D CAD drawings, and specifications for the configured products are quickly displayed. ASCO’s product configurators allow for immediate online purchase and greatly simplifies the reordering process.

Currently ASCO product configurators are available for 2-Way 8262/8263 Series Valves, 3-Way 8314 Series Valves, Redundant Control System , 8290 Actuated Globe Valves and 364 Series Spool Valves.

Configure 2-Way 8262/8263 Series Valve
Design 3-way 8314 Series Valves
ASCO 364 Series Spool Valves Configurator
Design 2-Way 8262/8263 Series Valves Design 3-Way 8314 Series Valves Design 364 Series Spool Valves
Design your Redundant Control Systems
Design your 8290 Actuated Globe Valves
Design Redundant Control Systems Design 8290 Actuated Globe Valves

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