Typically, a directional valve has one or more ports or connections attached to the valve. These connections are usually sized to fit the flow rate and application. The specification of a directional valve can vary depending on the type of product and the manufacturer. A common directional control valve has three or four ports. However, some manufacturers may produce a valve that has only a single port.
The most common directional valves are two-way valves, which have the capacity to switch between two positions. Some of these valves may also reverse the motion of a cylinder. These valves can be operated manually or electronically. Some models are available in a low temperature version, which has an operating temperature range of – 40 degrees Celsius.
Many directional valves are made of aluminum or brass. Some are made of plastic or composite materials. Generally, they have a diameter that is around three inches in length. They are used in a variety of applications, including water, gas, and wastewater.
Some directional valves are pilot-operated, while others are solenoid-operated. Typical applications for pilot-operated valves include chemical pumps, tubing circuits, and fluid dispensers. Some models are available in PTFE seats, while other models have a PTFE end connection.
A vast majority of directional-control valves used for industrial applications are two-position. A two-position valve has two ports, whereas a four-way valve has four. Whether you are looking for a two-way or a three-way, you should consider the viscosity of the fluid, the working temperature, and the pressure required to operate the valve. You will also need to determine the number of switching positions. For example, if you are in the oil and gas industry, you might want to buy a four-way, which has four distinct flow paths.
Youli is an experienced hydraulic directional valves manufacturer in Taiwan. They have been in business for over 30 years. They offer a wide range of products, including hydraulic thermal bypass valves, rotary vane valves, and check valves. Youli’s directional valves meet the increasing demands for functionality. They are manufactured to meet NFPA D03/D05 mounting standards. Youli’s products are also designed with DFM and FEA principles.
The main components of a directional valve are the diaphragm and piston. These are positioned between the pressure inlet and the return port. The diameter of the directional valve is usually between 1/8″ and 1/2″ NPT. The operating pressure of the directional valve is measured in pounds per square inch (psi). Youli hydraulic directional control valves can be rated for up to ten bar. These valves are available in a variety of styles, including globe, ball, and butterfly. Youli’s hydraulic directional control valves are used in a variety of industries.
Some of the other types of directional valves include the ball cone and the pilot operated direction valves. A directional valve is normally a two-way valve, but it can be a three-way or a four-way. A four-way directional valve has four ports and can be actuated using a variety of manual controls.