Valves are essential components in fluid control systems, regulating the flow of liquids, gases, and even solids in various industrial applications. They play a critical role in controlling pressure, direction, and flow rate, ensuring efficient and safe operation of pipelines and processing systems. From oil and gas to water treatment, power generation, and pharmaceuticals, valves are fundamental to nearly every industry.

Understanding the Function of Valves

A valve is a mechanical device designed to start, stop, shut off and regulate the movement of a medium through a system. It consists of a body, end cap, ball, stem, actuator, sealing elements, and control mechanisms, working together to either allow or restrict flow. Depending on the design, a valve can be operated manually, electrically, pneumatically, or hydraulically.

• On-Off Control: Opening or closing the flow completely. 
• Flow Regulation: Adjusting flow rate based on system requirements. 
• Pressure Control: Maintaining pressure within a safe operating range. 
• Directional Control: Directing the medium along predetermined pathways. 
• Backflow Prevention: Preventing reverse flow that can damage equipment.

Types of Industrial Valves and Their Applications

Different types of valves serve various functions, connection to pipeline and pressure rating, each designed to meet specific operational demands in industrial systems.

Ball Valve

A ball valve controls flow using a rotating spherical disc with a bore. It offers quick shut-off, minimal pressure drop, and long service life, making it ideal for high-pressure and high-temperature applications with reliable sealing.

☑ Applications: Oil and gas, chemical processing, water treatment, and power plants.

Gate Valve

A gate valve controls flow by raising or lowering a gate-like disc, providing minimal resistance when fully open. Ideal for on-off applications, it performs well in demanding systems but is not suited for frequent throttling.

☑ Applications: Petrochemical plants, steam systems, and high-pressure pipelines.

Knife Gate Valve

A knife gate valve uses a sharp-edged blade to cut through thick fluids, slurries, and solids-laden media, ensuring smooth flow and minimal clogging. It is ideal for handling viscous materials where traditional gate valves may struggle.

☑ Applications: Wastewater treatment, mining, pulp and paper, food processing, bulk material handling.

Butterfly Valve

A butterfly valve consists of a rotating disc that turns 90 degrees to control flow. It is lightweight and ideal for handling large volumes of fluid with minimal pressure loss.

☑ Applications: HVAC systems, marine industry, and water distribution.

Globe Valve

Globe valves are designed for precise flow regulation, using a linear motion to adjust the opening between the seat and the disc.

☑ Applications: Power generation, water supply systems, and cooling circuits.

Check Valve

Check valves prevent backflow by allowing fluid to flow in only one direction. They operate automatically without external control.

☑ Applications: Pumping stations, wastewater treatment, and oil refineries.

Valve Materials and Manufacturing Processes

The performance and durability of a valve depend heavily on its materials and manufacturing process. At VALTEK (Shanghai), we produce industrial valves using investment casting, forging, and advanced machining techniques, ensuring high precision and reliability.

• Materials Used: Carbon steel, stainless steel, forged steel, cast iron, and special alloys.
• Manufacturing Methods: Investment casting for complex valve shapes and forging for high-strength applications.

Why Are Valves Important in Industrial Applications?

Valves play a vital role in ensuring system efficiency, safety, and longevity. Proper valve selection directly impacts energy efficiency, operational stability, and maintenance costs. Industrial facilities rely on valves to:

• Maintain safe operating conditions under extreme pressure and temperature. 
• Optimize process efficiency by controlling flow rates. 
• Reduce downtime and maintenance costs with durable designs. 
• Enhance environmental compliance by preventing leaks and emissions.

Valves are indispensable components in industrial systems, enabling precise control 

over fluid and gas movement. Whether for on-off control, pressure regulation, or directional flow, 

choosing the right valve is essential for operational success. 

At VALTEK (Shanghai), we specialize in manufacturing high-quality industrial valves 

tailored to meet diverse industry needs.