• Control Valve

    Control Valve

Forbes Marshall Control Valve 
Maximum Technology, Minimum Maintenance

For over five decades Forbes Marshall has manufactured and provided advanced quality instrumentation products for various industries such as Power, Oil & Gas, Food & Beverages, Pharmaceuticals, Pulp & Paper, Chemicals and HVAC.

Forbes Marshall control valves and actuators are designed to cater to a variety of industrial control applications like steam, liquids and gases.

Forbes Marshall valves are modular in design and versatile in contruction. They are designed and manufactured using advanced CNC machinery thus making them virtually trouble free to operate with minimu maintenance. Coupled with single spring and multi spring diaphragm actuators, control valve series 100, 140 and 160 provide complete control solutions to most critical service conditions.

Our well-trained representatives are ready to help you select, size and install the most appropriate valve for your service.

What is a Control Valve ? 

Process plants consist of hundreds or even thousands of control loops all networked together to produce a product to be offered for sale. Each of these control loops is designed to keep some important process variable such as pressure, flow, level, temperature, etc, within a required

operating range to ensure quality of the end product. Each of these loops receives and internally creates disturbances that detrimentally affect the process variable and interaction from other loops of the network provides disturbances that influence the process.

To reduce the effect of these load disturbances, sensors and transmeitters collect information about the process variable and its relationship to some desired set point. A controller then processes this information and decides what must be done to get the process ter the load disturbance occurs. When all the measuring, comparing and calculating are done, some type of final control element must implement the strategy selected by the controller.

The most common final control element  in the process control industries is the control valve. The control valve manipulates a flowing fluid such as gas, steam, water, chemical compound to compensate for the load disturbance and keep the regulated process variable as close as possible to the desired set point.

Applicable Standards

Design ANSI B16.34
Flanges ANSI B16.5
F/F Distance ANSI B16.10
Leakage Class ANSI B16.104 FCI70.2