ASCO is the innovative, creative, & state-of-the-art leader for the control of fluids, combining over 100 years of experience with high technology. Select from the categories of valves below. Click on the functional valve name to learn more or to search for specific valves by  entering  criteria such as pipe-size, media or voltage.

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 double acting cylinder or actuator, and one or two outlets to exhaust pressure from the cylinders.	Condensate Drain Valve Assemblies These valves are designed to automatically drain condensate in compressed air systems. The series features standard 2-way solenoid and piloted piston valves, along with an adjustable electronic timer.
Direct Mount These Series are standard 3-way and 4-way solenoid valves whose NPT pipe connections and mounting configurations have been replaced by NAMUR mounting configuration.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.	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.
Dust Collector These 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.	Isolation Isolation valves incorporate a diaphragm that shields the fluid flowing through the valve from the internal solenoid components making them ideal for handling corrosive or high purity fluids. These valves are available with in-line porting or manifold constructions and in a wide variety of inert materials.
Manual Reset  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.	S Series  ASCO commercial application solenoid valves. Developed and engineered with ASCO's global resources. ASCO S is a compact solution for 2-way, 3-way and steam valve applications and can operate in 15°F to 125°F ambient temperature locations. This solution includes DIN connection for easy wiring, compact brass bodies and encapsulated coils. Options include 15" leads, alternate elastomers, manual operators, and mounting brackets.
Pinch Pinch valves are designed to control the flow of fluid by locating soft tubing in a mechanism that "pinches" the tubing to block flow and releases to allow flow. Pinch valves are suitable for corrosive fluids, high purity applications, or fluids with particulate.	Medical/Analytical Micro-Miniature General Service, Isolation, and Pinch valves for the reliable control of fluids and gases in medical equipment and analytical instrumentation.
Options/Accessories ASCO offers a wide variety of accessories and optional features to meet your specific application requirements.