A Control Valve controls fluid flow by altering the size of the flow passage from a controller, altering the flow rate and the process quantities such as pressure, temperature, and liquid level. Amongst those available at Curtiss Wright are;
A Control Valve alters the flow rate by changing the size of the flow passage from a controller influencing quantities of gas or liquid to having an impact on pressure, temperature, and liquid level.
Depending on the type of valve chosen, the limiting mechanism is moved by an electrical, mechanical, pneumatic, or hydraulic actuator. The valve regulates the flow of movement through a valve plug. The plug is attached to a valve stem, which is connected to the actuator.
Processing plants consist of hundreds of control loops that are networked together in order to produce a certain product. Each loop is designed to control certain variables such as pressure, temperature, flow or level within a required range.
However, each loop receives and internally creates disturbances, affecting the process variable and interaction from other loops within the network, which can have a cumulative effect when multiple loops are connected. In an effort to reduce the disturbances, sensors and transmitters are used to collect information. Controllers then process the information and decide the best way to get the process variable back to where it should be.
Once all of the calculating, comparing and measuring has taken place, a type of control element must then implement the strategy which has been selected by the controller, using the valves to alter pressure within the system, compensating for any noise or disturbances and allowing the system to return to a desired state of pressure, flow or temperature.
Feedwater Control Valves - Industrial applications for high pressure and temperature service environments such as Power Plants and Petrochemical Plants:
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3-Way-Valve - With encapsulated super-long bellows and emergency gland or with stuffing box seal - Suitable for toxic or flammable gases and liquids.
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Oxygen Control Valves - with a straight pattern body- Suitable for steelworks and piping.
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A power plant uses hundreds of valves to control every aspect of its operation. The control valves are critical for optimizing the power plants efficiency can often be exposed to high temperatures and abrasive chemicals.
With the ever-increasing demand for sourcing renewable power and curbing carbon emissions, producing high quality manufactured valves is more important than ever.
Curtiss-Wright have developed innovative control valves that can withstand high environmental demands while remaining cost-effective. Our valves can support throttle accurately, increasing performance for critical power plant operations.
The petroleum industry is best known for its global exploration and extraction of oil. However, it’s applications are not just limited to oil or gas. Petrochemical plants also manufacture plastics, dyes, food additives and other petrochemicals that derive from natural gas, coal or oil.
Due to the extreme temperatures and pressures needed to produces the materials, high-quality engineering is essential to the operation of petrochemical plants.
Control valves are critical to the performance of the system. Chemicals used in this industry can be hazardous to the surrounding environment and people, making system regulation essential.
At Curtiss Wright, we offer an extensive range of valves, including:
Manufacturing plants contain numerous control loops, running at the same time and interacting with each other based on instruction from sensors. Control valves play a crucial part in the quality control process.
Process example:
A control valve is designed to control flow rate, pressure, level or temperature, depending on the desired set point and application. The valve includes a plug or disk, and the position of the plug can be changed by an actuator, to allow fluid or gases through.
Control valves are used in applications including:
Pressure control valves are primarily used in hydraulic systems, assisting in a variety of functions and are designed to monitor and regulate pressure, either manually or electronically.
Types of pressure valves include:
At Curtiss Wright Valve Division, you’ll find various products suited to an array of industrial markets worldwide, including Power Generation, Oil & Gas, Chemical/Petrochemical, and Defense. Curtiss Wright Valve is an expert manufacturer in control valve manufacturing.
Our range of valves includes Butterfly Valves, Changeover Valves, Check Valves, Control Valves, Directional Control Valves, Engineering Services, Engineering Software, Gate Valves, Globe Valves, Plug Valves, Pressure Relief Valves, Strainers and Instrumentation Equipment.
If you require further information on any product, such as specification sheets, you can find them in the related documents or the library. To locate and contact your nearest sales office, click here. Alternatively, you can fill in a contact form here.
