What is an Angle Seat Valve?

How Does a Angle Seat Valve Work?

The Angle Seat Valve has two working modes: normally open and normally closed. Angle seat piston valve stand out due to their advantages of fast fluid switching, high flow rate, and low resistance to fluids.Understanding the structural composition is very helpful for how it works.

Components of  Angle Seat Valve

Valve Body: The main body of the angle seat piston valve is generally made of stainless steel, brass, or other high-pressure and corrosion-resistant materials, providing support for the internal working components.

Actuator: Actuators have three driving methods to operate seat valve: pneumatic operated by compressed air,electric, hydraulic, and manual. 

Piston: Usually composed of corrosion-resistant, wear-resistant, and high-strength stainless steel,serve as the connecting components between the piston rod and the valve core.

Valve core and seat:The valve core is a key component for controlling the flow of the medium, and the seat valve is the sealing surface when the valve core is closed. Under the combined action of the valve plug and valve seat, the flow diameter (bore size) of the angle seat valve is influenced and controlled.

The working principle of of angle seat valve:

◆ In the initial state, the spring presses the valve core against the valve seat, and the diameter is closed, which is the state where the valve is not connected.

◆ When the compressed air is introduced into the pneumatic actuator, the pneumatic actuator starts to work, and the actuator's piston rod moves to drive the angle seat valve stem. The valve stem lifts the valve core, opens the diameter, and then angle seat valve is opening.

◆ After stopping the gas supply, the spring pulls the valve core to reset that means it is tightly attached to the valve seat, closing the fluid channel.

Angle seat valve with Normally open state work in the opposite way.The following are the specific working steps for the two states of normally open and normally closed.

Normally closed:

Default closed, relying on spring force to press the valve core.

After ventilation, the air pressure pushes the piston, compresses the spring, and lifts the valve core - the valve opens.

Stop gas supply, reset the spring, and close the valve.

Normally open:

By default, the spring keeps the valve core in the open position.

After ventilation, the piston presses down on the valve core - the valve closes.

Stop gas supply, the spring lifts the valve core again - the valve opens.

The Advantages Of  Angle Seat Valve

Angle seat pneumatic valves are highly regarded for their efficient and reliable performance in a variety of fluid control applications. 

◆ High Flow Capacity: Due to the unique angle design, angle seat valve allows fluid to flow more freely compared to conventional valves, ensuring high flow rates.

◆ Durability: Seat valve is very sturdy, using materials such as brass and stainless steel, combined with the structure of the piston, Compared to non piston valves such as ball valves, butterfly valves, globe valves, this making seat valves have higher pressure adaptability.

◆ Space-Efficient Design: The special angle design minimizes the space needed for valve installation, making them suitable for confined spaces and complex setups.

◆ Smooth Operation: Angle seat valves provide smooth, quick action, reducing the likelihood of damage to equipment in automated systems, increasing operational efficiency.

◆ Low Maintenance: Their simple and special valve design and fewer moving parts make angle seat valves more reliable and easier to maintain, reducing downtime in industrial processes.

Type and Structure Comparison: Pneumatic vs Electric vs Manual Angle Seat Valve

• Pneumatic Actuation: Operated by compressed air to open and close the valve. Fast response and suitable for frequent operation. Drawback: requires an external air supply.

• Electric Actuation: Uses an electric actuator to control valve opening and closing, allowing remote operation. Drawback: slower opening and closing speed.

• Manual Operation: Operated by a handle or knob for opening and closing. Low cost and simple structure. Drawback: requires manual intervention.

Common Application 

Angle seat valve is a ideal for applications where high flow, fast response, and reliable sealing are required. Understanding the components of angle seat valve is crucial for proper use. It can be used in a variety of industrial settings. Some of the most common applications include:

◆ HVAC Systems: Used for controlling airflow in heating, ventilation, and air conditioning systems.

◆ Chemical Processing: These are ideal for regulating the flow of chemicals in processing plants, especially with stainless steel angle seat valve has resist corrosion.

◆ Food and Beverage: In processing and packaging, pneumatic angle seat piston valve ensure precise control of fluids and gases in hygienic environments.

◆ Automated Machinery: Often found in automated systems for controlling the flow of fluids and gases to machinery, where quick and reliable operation is key.

◆ Water Treatment Plants: They are crucial for managing the flow of water in filtration and purification systems, ensuring continuous operations.

Angle Seat Valve Types

Pneumatic angle seat valves are mostly driven by pneumatic actuators.which is also the main type of valve we provide.There are several types available when choosing an angle seat valve, each designed for different operational needs:

◆ Standard Angle Seat Valve: Suitable for most industrial applications that require medium pressure and steam control.Like SMC,Festo,Airtac standards and so on.

◆ High-Pressure Angle Seat Valve: These are designed to handle high-pressure systems and are often used in oil & gas, and chemical industries.

◆Valve Orifice:The diameter of the angle seat valve is different, for example, the PV100 series has a smaller diameter, while the PV500 series has a larger diameter.The larger the orifice, the more suitable it is for working conditions with higher flow rates.

◆ Stainless Steel Angle Seat Valve: Known for their corrosion resistance, these are ideal for environments where hygiene and durability are critical, such as the food and beverage industry.

◆ SMC Angle Seat Valve: SMC is widely used in pneumatic applications due to their high precision and reliability in controlling air flow.

◆ Custom Angle Seat Valve: Tailored solutions to meet specific needs, such as special materials or pressure ratings, available from us for specialized applications.

Choose Suggestions

The performance of a angle seat valve largely depends on the selection of its valve body material and sealing material. When making a choice, it should be based on specific needs.

Material Compression

• Stainless Steel: Corrosion-resistant, high-temperature tolerant, and high strength. Suitable for chemical processing, food and pharmaceutical industries, steam, and corrosive fluids.

• Brass: Cost-effective and suitable for neutral media. Commonly used for compressed air, cooling water, and small-scale systems.

• Plastic: Resistant to certain chemicals and lightweight. Ideal for low-temperature, low-pressure, and non-metallic environments.

Seal Material

• PTFE: High temperature and corrosion resistance with low friction. Suitable for strong acids, alkalis, and high-temperature media.

• NBR: Oil-resistant with good elasticity. Ideal for compressed air and hydraulic oil.

• EPDM: Resistant to hot water and steam. Suitable for drinking water and low-concentration chemicals.

Fokca Introduction

Fokca is a professional angle seat valve manufacturer of startup equipment based in Ningbo, specializing in a wide range of pneumatic valves, including Angle Seat Valves, Globe Control Valves, Solenoid Valves, and other valve products. Additionally, we offer Pneumatic Hoses & Connectors, Hydraulic Components, and other types of products.As automation equipment suppliers, we are dedicated to supplying high-quality valves and pneumatic components, meeting the valve needs of various industrial applications.