Valves - ASCO

Solenoid valves provide fast, reliable on/off control of water, air, gas, oil, steam and chemicals using an electrical signal. They automate filling, dispensing, cooling, cleaning and safety shutoff in countless machines and systems.

Solenoid Valve Types

• 2-way valves – simple open/close flow control
• 3-way and 4-way valves – divert flow or operate actuators
• Direct-acting valves – work from zero pressure
• Pilot-operated valves – larger flows at line pressure
• Specialty valves – steam, fuel gas, cryogenic and proportional

Choosing a Solenoid Valve

Confirm the media, pressure range (including minimum pressure differential), temperature, port size and Cv. Choose body and seal materials compatible with the fluid, and select a coil voltage and enclosure rating for the location. Normally closed or normally open depends on the fail-safe state you need.

Centro carries solenoid valves for water, air, steam, gas and process applications.

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Pilot valves are critical for operating larger valves or control actuators in fluid control systems. These valves act as control mechanisms, receiving signals from external devices such as sensors, controllers, or other valves and initiating the opening or closing of the main valve or actuator. Pilot valves are commonly used in applications where high-pressure fluids or significant flow rates are involved, such as hydraulic systems, pneumatic systems, and industrial machinery. They provide reliable and precise control, ensuring efficient operation and safety. With various configurations and actuation methods available, including solenoid-operated, manual, or pilot-operated, pilot valves offer versatility and flexibility to meet specific system requirements.

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Fuel, gas and oil valves control and shut off flow to burners, boilers, engines and fuel systems. Safety-approved valves protect people and equipment.

Valve Types

• Safety shutoff solenoid valves – burner trains
• Fuel oil solenoid valves – oil burners
• Gas ball valves – manual isolation
• Motorized gas valves – slow-opening control

Choosing a Valve

Select by fuel type, pressure, size and required approvals (UL, FM, CSA). Burner trains must meet applicable codes.

Centro supplies fuel, gas and oil valves for combustion systems.

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Hot Water and Steam Valves are essential components designed to control and regulate the flow of hot water and steam in various applications. These valves are specifically engineered to withstand high temperatures and pressures, ensuring reliable operation in heating systems, steam boilers, industrial processes, and other applications requiring hot water or steam control. With durable materials and robust construction, these valves provide precise control and help maintain system efficiency and safety. Hot Water and Steam Valves are widely used in industries such as HVAC, power generation, manufacturing, and commercial buildings where reliable and efficient hot water and steam management is crucial.

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Valve repair kits and parts are essential components used to maintain and repair valves in fluid control systems. These kits typically include seals, gaskets, o-rings, springs, and other necessary parts needed to restore or replace worn or damaged elements of a valve. Valve repair kits and parts enable the repair and refurbishment of valves, extending their lifespan and ensuring proper functioning. By using these kits, operators can quickly and cost-effectively address valve issues without requiring complete valve replacement. These kits are available for different types and sizes of valves, allowing for specific repairs tailored to the valve's design and requirements. Valve repair kits and parts are essential for industries such as manufacturing, petrochemicals, water treatment, and HVAC, where reliable valve performance is crucial.

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Cryogenic valves are designed to operate in extremely low-temperature environments, typically below -150°C (-238°F). These valves are engineered with materials and components that can withstand the challenges posed by cryogenic conditions, such as thermal contraction and brittleness. They are essential for safely and efficiently controlling cryogenic fluids like liquid nitrogen, oxygen, or liquefied natural gas (LNG). Cryogenic valves are built to minimize heat transfer and prevent the freezing of internal components, ensuring reliable performance and preventing leaks. They find applications in aerospace, medical, energy, and research, where precise and secure control of cryogenic fluids is crucial. These valves are designed to maintain safety, reliability, and efficiency in low-temperature environments.

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Valve accessories add control, feedback and protection to valves. Actuators, positioners, limit switches, handles and locking devices make valves easier and safer to run.

Accessories Available

• Actuators – pneumatic and electric automation
• Positioners – modulating control
• Limit switches – position feedback
• Gear operators and handwheels – manual operation
• Locking devices and extensions – safety and access

Choosing Accessories

Match valve type, size and mounting standard (ISO 5211). Choose environmental ratings for the installation.

Centro supplies valve accessories and automation packages.

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Microfluidic valves are miniature valves specifically designed for controlling and manipulating small volumes of fluids at the microscale level. These valves play a crucial role in microfluidic systems, used in various fields such as biomedical research, pharmaceuticals, chemical analysis, and diagnostics. Microfluidic valves enable precise and automated fluid flow control, allowing for the accurate routing, mixing, and metering of fluids on a micro scale. They are typically made from materials compatible with biological samples and can be actuated using pneumatic, mechanical, or electrostatic methods. These valves offer high accuracy, low dead volume, and fast response times, making them ideal for applications requiring precise fluid handling at small scales.

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Pulse valves are specialized valves used in pulse-jet dust collection systems commonly found in industrial settings. These valves are specifically designed to provide efficient and reliable cleaning of dust collector filter bags or cartridges. Pulse valves release short bursts or pulses of compressed air into the filter bags, creating a shockwave that dislodges accumulated dust particles, allowing them to fall into the collection hopper. This cleaning process helps maintain the effectiveness and longevity of the filtration system. Pulse valves are known for their rapid response, high flow capacity, and durability in demanding environments. They are widely used in manufacturing, mining, and energy industries, where effective dust control is essential for maintaining air quality and preventing equipment damage.

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Angle seat valves, also known as angle valves or angle-seat piston valves, are versatile and reliable devices used in fluid control systems. These valves feature a unique design with a 90-degree angle between the inlet and outlet ports, allowing for efficient flow control and excellent sealing capabilities. The valve body typically houses a piston that can be pneumatic or electric in response to the actuator. This movement controls the flow of the fluid, allowing precise regulation and shut-off. Angle seat valves are widely used in applications requiring accurate control of liquids or gases, such as industrial processes, water treatment systems, and HVAC systems. They are known for their durability, high flow capacity, and contaminant resistance, making them a popular choice in various industries.

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Proportional valves are advanced control valves that provide precise and proportional control over fluid flow rates or pressures. These valves are designed to accurately regulate the flow or pressure of liquids or gases in various industrial applications. Proportional valves offer the ability to adjust the valve opening or position in proportion to an input signal, typically an electrical or analog signal. This allows for fine-tuned control and modulation of the flow or pressure, enabling precise adjustments based on system requirements. Proportional valves are commonly used in automation, robotics, process control, and hydraulic systems, where precise and dynamic control is essential for optimal performance.

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Flow control valves are essential devices used in fluid control systems to regulate the flow rate within a pipeline or system. These valves allow for precise adjustment of flow rates, ensuring optimal performance and efficiency. By controlling the opening or closing of the valve or by using throttling mechanisms, flow control valves can increase or decrease the flow rate as desired. This enables operators to maintain stable flow conditions, prevent fluid overload, and achieve accurate flow control for various applications. Flow control valves are commonly used in manufacturing, oil and gas, water treatment, and HVAC systems, where precise flow management is critical for operational success.

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Pneumatic control valves are essential components used in pneumatic systems to regulate and control the flow of compressed air or gas. These valves are crucial in various industrial applications, including automation, manufacturing, and process control. Pneumatic control valves are designed to receive signals from pneumatic controllers or other control devices, allowing for precise airflow, pressure, and direction adjustment. By opening or closing specific ports or channels, these valves enable the efficient control of pneumatic actuators, such as cylinders or motors. They offer fast response times, high repeatability, and reliable operation, making them ideal for applications requiring precise and dynamic control of pneumatic systems.

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Directional control valves are the backbone of hydraulic and pneumatic systems, managing the flow and direction of fluids to keep operations running smoothly. Whether you need to move a hydraulic cylinder, power a motor, or automate a system, these valves help direct fluid where it needs to go. They are essential in manufacturing, construction, and automation, ensuring precision and efficiency in fluid-powered equipment.

What Types of Directional Control Valves Are Available?

We offer a variety of directional control valves to fit different system needs:

• Solenoid-operated valves – Use electrical signals for fast and automated fluid control.
• Manual directional valves – Controlled by hand levers or push buttons for simple, direct operation.
• Pilot-operated valves – Utilize hydraulic or pneumatic pressure to control larger fluid flows with minimal effort.
• Spool valves – Efficiently switch fluid paths to direct flow as needed.

How to Choose the Right Directional Control Valve

Finding the right directional control valve depends on several key factors:

• System pressure and flow rate – Ensuring the valve can handle your application’s demands.
• Control method – Deciding between manual, electric, hydraulic, or pneumatic operation.
• Number of ports and positions – Matching the valve configuration to your system’s needs.
• Application type – Whether it's for industrial automation, mobile machinery, or other fluid-powered equipment.

Why Buy Directional Control Valves from us?

• We carry a wide selection of high-quality directional control valves.
• Our valves are built for reliable performance in demanding applications.
• We offer expert guidance to help you find the right solution.
• Our pricing is competitive, with products from trusted manufacturers.

If you need a directional control valve that keeps your system running efficiently, we’ve got you covered. Browse our selection online or contact our team for expert advice.

Related categories: Valves | Flow Control Valves | Valve Positioners | Fuel, Gas, and Oil Valves | Cryogenic Valves