Metering is measuring or regulating the flow rate to or from an actuator. To learn more about one-way flow control valves, contact us at Mastermac2000.com.au. It is located in the control loop, an essential part of the water softening industry’s final control element. It helps in directly controlling the flow rate and thus helps in regulating the other vital processes quantities such as temperature, liquid level/flow, and pressure. Adjustable speed is present during the advance and return strokes. multiple orifice: A style of valve trim where the flow passes through a multiple of orifices in parallel or in series. A meter-in flow control valve (also known as a reverse flow control valve) restricts the flow to an actuator. Our pneumatic flow control valves include a bypass check which allows rapid free flow from the output through the input port. Ball valves are among the simplest options, consisting of a ball attached to a handle. Flow control valves are used to regulate the speed of hydraulic cylinders and motors by controlling the flow rate to these actuators. Needle valves, which are among the more precise valve options, have an adjustable needle and a valve stem which restricts or allows the flow of liquid. 5 BASICCOMPONENTSOFCONTROLSYSTEMS CONTROL V Obstructing the orifice results in a decrease or blocked flow. The flow rate is the same in both directions. Exhaust air and supply air one-way flow control function. To know the function of a … The pressure reducing valve and the smothering of this valve are placed in series with each other. The flow control valves don’t obstruct the fluid flow as a result of contamination. c. both a. and b. d. none of the above. Disc Valve: To control flow through a pipe these types of valves are used and consist of a round flat plate mounted to the end of a stem that enters the pipe at 45 degrees. This can be especially challenging to accomplish at very low operating pressures within a … This is based on the physics concept surrounding work, energy, and power: Actuator force x distance traveled = work done on load. Pressure-compensated variable flow valves have a compensator which automatically adjusts to various load and inlet pressures to maintain a consistent rate of flow (with a typical accuracy within 3% to 5%). A control valve that regulates the flow of fluid falls in the regulation category. They are made of brass, carbon steel, stainless steel, synthetics, and zinc. Flow control valves for hydraulic systems (liquids under pressure) are of the same basic design. Typically, these control valves are non-mechanical, usually relying on the undesirable conditions of the regulated substance to open or close the valve. Pinch Valves. pumps and valves, you assume the responsibility for selecting appropriate sizes. Norgren is a world leader in motion and fluid control technologies, delivering exceptional solutions which improve our customers' equipment. Flow control valves are essential for optimizing system performance, relying on a flow passage or port with a variable flow area. Valves control fluid flow in motors, plumbing, irrigation, pneumatic and hydraulic systems. All rights reserved. Poor Fuel Economy. valve: A valve is a mechanism that opens and closes to control the flow of fluids. The energy transfer must be equal to the total work done. In the collection of hydraulic valve components, flow control valves are any device manufactured for the purpose of modifying the rate of fluid flow in a portion of a hydraulic circuit. The most basic kind of flow control valves consists of a changeable aperture, which closes to slow flow rate or opens to increase the flow rate. Control Valve Features. Normally, When the vehicle is running at high speed, there is less tire resistance and, consequently, less steering effort required. With this type of control valve, there is only one direction where the flow control works. Supply air one-way flow control function. . Other valve types function in a similar way with some mechanism for either permitting or blocking flow. Flow control valves regulate the pressure or flow of fluid. What is the function of a flow control valve? The primary purpose of the flow control valve is to regulate the flow rate of fluids to various components in a hydraulic circuit. at low flow when the control valve is just opening, the valve gain is low and its flow change is insensitive. Such valves are designed to deliver constant flow, and they operate based on the principal that such flow will be delivered if there’s a constant head loss (resistance to flow) across an orifice. Pinch Valve: Pinch valves are low-cost flow control valve suited for slurries or liquids containing significant amounts of suspended solids. Applications. What is the function of a flow control valve Flow control valves are used to regulate the speed of hydraulic cylinders and motors by controlling the flow rate to these actuators. With this type of control valve, there is only one direction where the flow control works. A control valve manipulates or regulates the flow of different fluids, such as water, gas, steam, or oil. Related Content. There is this flow control pilot that observes the head loss across the orifice and modulates the valve to keep it constant. Because the actuator speed determines the rate of energy transfer, speed is a function of the flow rate. In a scientific context, fluids include both liquids and gases – any substance that can flow freely – and valves may use either. Flow control function in both directions. (There are exceptions) If your valve "regulates the flow" it's probably actually a pneumatic, motorized, or otherwise proportional valve (also called a control valve). - Published on 14 Aug 15. a. flow control valve changes the direction of oil flow. Selecting the right hydraulic flow control valve can address some of these concerns, although completely mitigating these issues may require a sophisticated control valve, such as a pressure- and temperature-compensated variable flow control valve. What are the three ways of applying flow control valves Meter in, meter out and bleed off are ways of applying flow control valves. The flow control valve on a boiler regulates the flow of hot water to the system. Learn how your comment data is processed. Control valves are being used because it provides an inexpensive solution to many concerns related to flow control. Control valve is used to regulate the fluid flow by changing its size or course as directed by the signal from a controller. There is an actual speed adjustment through the exhaust air flow control. How does a control valve operate? The specified volume controls the speed of a cylinder or hydraulic motor. The function of a flow control valve is to regulate flow at a constant rate – regardless of inlet water pressure. They are designed to fit for complex pneumatic and hydraulic systems. In order to shut off the flow, the handle is used to turn the hole perpendicular to the valve openings, which obstructs the flow. Flow control valves come in all shapes, sizes, and designs. A uni directional flow control valve allows the control of air flow in one direction only. This site uses Akismet to reduce spam. There are a variety of flow control valve designs, with most intended for specific applications. Exhaust air one-way flow control function. In a scientific context, fluids include both liquids and gases – any substance that can flow freely – and valves may use either. We offer two types of air flow control valves. The more sophisticated options can sense pressure changes and respond accordingly, or monitor flow rate and respond when the flow rate exceeds a defined threshold. Typically, they are used on pipelines delivering water to multiple users to ensure that sufficient flow is distributed. - 12 - GLOBE VALVE FTC — Flow To Close FTO — Flow To Open FTC Flow Direction LINEAR CONTROL VALVE Flow Direction (Packing exposed to higher P1 pressure) FTO 2. The most basic kind of flow control valves consists of a changeable aperture, which closes to … In hydraulic systems, they’re used to control the flow rate to motors and cylinders, thereby regulating the speed of those components. With proportional valves, output flow isn’t exactly linear in relation to the control signal. In the food, pharmaceutical, and dairy industries these valves are used. Correct flow control valve for a particular application can be selected on the basis of pressure drop specified a. It is part of the hot water supply side of the boiler and one of the major components of a hot water boiler. How to Select a Valve Actuator: Types of Valve Actuators, Appropriate Sizing, Safety Criteria, and More, Industrial Control Panel Design Guide: Schematics, Standards, Design Considerations & More, Proper Valve Labeling and Identification Tips: Labeling the Right Parts, Understanding Labeling Standards, Valve Tags, and More. For example, they benefit situations where it is necessary to maintain a constant speed of operation of a hydraulic cylinder regardless of the magnitude of the load that the cylinder is moving. Uni directional flow control valve. They are capable to determine the path through which the fluid should flow in a circuit. Flow-control valves are used to control an actuator’s speed by metering flow. In hydraulic systems, they’re used to control the flow rate to motors and cylinders, thereby regulating the speed of those components. It uses a pinching effect to control the fluid flow. Pressure-compensated variable flow valves, What are the Most Common Flow Control Valve Types? What's the Function of a Boiler Deaerator, and How do They Operate? Other functions are regulating the speed of linear and rotary actuators, regulating the power availability for the subcircuits, dividing and regulating the pump flow, etc.. Now we can discuss the hydraulic flow control valve working principle. Flow-control valves are used to control an actuator’s speed by metering flow. What moves the piston between air cushions are the uncontrolled supply air and controlled exhaust air. Well, usually the transfer function for a solenoid valve is: On: 0% Off: 100% A solenoid is typically a binary on/off device. One of the many types of flow control valves includes one-way flow control valves. Functions of valve actuator: Move the valve ball, plug or stem to the required position. Occasionally, flow control valves will be regulated with exterior monitoring devices, such as pressure and temperature gauges. This anti-clogging property is an important feature of flow control valves. This enables the direct control of flow rate and the consequential control of process quantities such as pressure, temperature, and liquid level. What is the function of a flow control valve? The control valve is responsible for controlling the flow rate to cylinders and motors in hydraulic systems, thus helping to regulate the velocity of those parts. Reduced fluid consumption, low cost, reliability and improved performance are the main advantages of the flow control valve. It is located in the control loop, an essential part of the water softening industry’s final control element. There are certain symptoms, which needs immediate attention for repair, and smooth functioning of oil control valve. A Special Kind of Flow Control Valve: The Poppet Valve, The Applications of the Pneumatic Valves Called Microvalves, Diverter Valves Are Air Rams for Diverting Air, The Homogenising Pressure Control Valve or Nanovalve, Compressed Air Systems Rely on Proper Filtration through a Flow Control Valve. This is done by suitable restriction of the compressed air flow rate in supply air or exhaust air direction. Learn about Gate Valves, Globe Valves and Other Flow Control Valves. Your email address will not be published. Flow control valves installed into the work ports of a cylinder, for example, can be installed to restrict flow either going into or coming out of the cylinder port. They typically incorporate international standard mounting and fluid flow patterns. How do you control the flow rate with a needle control valve? Some of them include: Smooth functioning of Oil control valves 1. You can see that; some valves serve dual purposes such as the globe and the ball valve can be used as isolation as well as a control valve. A basic flow control valve opens and closes to adjust the rate of water in the boiler. Flow rate varies as a faucet handle is turned clockwise or counterclockwise. CONTROL VALVE CLASSIFICATION GUIDING Cage Seat/Skirt Stem Top (Post) Top & Bottom CHARACTERIZATION Cage Seat Ring Cam; end-of-shaft (Rotary) Plug Contoured Head Fluted Skirted 12. For more information on valve actuators and flow control valves, visit the following posts: Your email address will not be published. ANSWER: flow control valve can adjust the flow rate of hydraulic oil . Hydraulic flow control valves also control the rate of energy transfer at a given pressure. The directional control valves can be used to start, stop, and to change the fluid flow in a hydraulic system. For either basic design type, the valve positioner is connected mechanically to the valve stem or valve shaft so that their position can be compared with the position dictated by the controller. Rotary valves typically take up less space than linear valves while performing the same basic function. http://www.theaudiopedia.com What is FLOW CONTROL VALVE? Flow control valves are essential for optimising system performance and relying on a flow passage or port with a variable flow area. Valves control fluid flow in motors, plumbing, irrigation, pneumatic and hydraulic systems. In addition to the control valve, there are other variables that influence the flow rate, including temperature, pump output, and other factors. - Published on 14 Aug 15 a. flow control valve changes the direction of oil flow b. flow control valve can adjust the flow rate of hydraulic oil c. both a. and b. The flow rate can be adjusted in varied ways in both directions. Priority valves — A priority valve, Figure 7, is essentially a flow-control valve that supplies fluid at a set flow rate to the primary circuit, thus functioning as a pressure-compensated flow-control valve. It is also refereed as ‘final control element’ in automatic control terminology. Firstly, the leak-free nature of the main and control functions and secondly, the integral pressure-compensator function for responsive, controlled and load-independent lowering. Flow Control Function (DPCME) 2-way Screw-in Proportional Cartridge Valves are used to regulate flows from port "A" to "B." They are essential components of a piping system that conveys liquids, gases, and … Their selection and placement within a pneumatic circuit will greatly affect the function of an actuator. The purpose of a flow control valve is to regulate the flow rate in a specific portion of a hydraulic circuit. A flow control valve is a mechanical device used to regulate and control the flow of a liquid or gas. 9. The valve modulates flow through movement of a valve plug in relation to the port(s) located within the valve body. Therefore, it is necessary to maintain a constant fluid flow volume from the pump regardless of the speed, and this is the function of the flow control valve. 3. control valve. How does a control valve operate? For example, they benefit situations where it is necessary to maintain a constant speed of operation of a hydraulic cylinder regardless of the magnitude of the load that the cylinder is moving. What moves the piston between air cushions are the uncontrolled supply air and controlled exhaust air. Hold the position against the forces of the flow stream. There are different types of flow control valves on the market, including needle, ball, diaphragm, plug and butterfly valves. The valves can be easily interfaced with SCADA systems using the VC-22D Electronic Valve Controller to add system performance visibility and control a wide variety of valve applications. Save my name, email, and website in this browser for the next time I comment. ANSWER: c. 2, 3 and 4 . 1080 Skillman Drive,Cincinnati, OH 45215 USA, Toll Free: 800-528-4058 valve is a mechanical device that controls the flow of fluid and pressure within a system or process. A control valve manipulates or regulates the flow of different fluids, such as water, gas, steam, or oil. FLOW CONTROL VALVES FREQUENTLY ASKED QUESTIONS 1. There is an actual speed adjustment through the exhaust air flow control. A pressure-compensated flow control valve has a fixed throttling flow at all pressures. Required fields are marked *. If different plant systems operate up to, and at pressure/temperature combinations that require Class 300 valves, sometimes (where the design permits), all control valves chosen will be Class 300 for interchange-ability. Hydraulic flow control valves provide a cost-effective solution to concerns surrounding the flow rate. In a hydraulic circuit, actuators are controlled by the flow control valve. Exhaust air one-way flow control function. This type of flow control valve regulates the piston speed of pneumatic drives throughout the execution of return and advance strokes. It can depend on the type of valve and use, however, they are most commonly used in nearly all types of hydraulic systems. Source: Parker Hannifin (Click image to enlarge) Pressure-compensated flow control valves are useful in a variety of hydraulic applications. The valve plug is attached to a valve stem, which, in turn, is connected to the actuator. Types of actuators: 1, 3 and 4 c. 2, 3 and 4 d. all the above View Answer / Hide Answer. Provide the required operation for full control, from fully open to fully closed. A true flow control valve by most definitions is a needle valve with a reverse flow check valve. The most common final control element in the process control industries is the control valve. In a closed position, flow stops. Ball valves are some of the simplest types of … A flow control valve is a mechanical device used to regulate and control the flow of a liquid or gas. Here’s a look at the function of hydraulic flow control valves, the various types and components, and how they work, as well as some important considerations in selecting the appropriate hydraulic flow control valve for a specific application. Tel: 513-772-8281 To know the function of a control valve in a water softener, you should first understand how it operates. The primary purpose of the flow control valve is to regulate the flow rate of fluids to various components in a hydraulic circuit. The function of a flow control valve is to regulate flow at a constant rate – regardless of inlet water pressure. a. flow control valve changes the direction of oil flow. A butterfly valve, for instance, has an internal metal plate attached to a turning mechanism. The flow rate can be adjusted in varied ways in both directions. b. Globe, needle, butterfly, diaphragm, ball, plug, and pinch valve are used as a control valve. 1.2 Functions of Valves: The mechanical device that controls the flow and pressure within a system or process is called Valves and there are many types of valves such as gate valve, globe valve, ball valve, etc. The most common types of flow control valves include: The simplest flow control valves have an aperture which opens or closes in order to increase or slow down the flow rate. © 2016 Master Mac 2000 P/L. Flow variability occurs through the adjustment of the effective orifice size inside the valve, and this is achieved through various techniques based upon the type of valve and its manufacturer. The ingenious principle makes it possible to combine several functions in one valve. The valves have simple tool orifices with a complex set of electro-hydraulic valves to adjust in the different variations in pressure and system temperature. How Does a Boiler Deaerator Work? A control valve is a valve used to control fluid flow by varying the size of the flow passage as directed by a signal from a controller. The flow rate is the same in both directions. A cost-effective flow control valve, pinch valves are ideal for applications of slurries or … The function of a needle valve is to _. provide a restriction to airflow. Manufacturer Based on tests performed in a system where great care is taken to ensure that the pressure drop across the test valve is held constant at all valve openings and flow rates 5. Learn about Gate Valves, Globe Valves and Other Flow Control Valves, Pressure-compensated, variable flow valves, Pressure- and temperature-compensated, variable flow valves, Pressure-compensated proportional flow-control valves, Allowable leakage limit when the valve is in a closed position, Connectivity to the process (screws, welding, etc. Parker flow control valves are designed to regulate the flow rate and pressure of media through a pipeline. 4 BASICCOMPONENTSOFCONTROLSYSTEMS CONTROL VALVES Monsen, 2015 INHERENT CHARACTERISTICS Valve flow capacity Valve opening NO system effects involved Who provides it? Control valves normally respond to signals generated by independent devices such as flow meters or temperature gauges.The hydraulic actuators respond to changes of pressure or flow and will open/close the valve. This allows one valve sub-plate to serve as the mounting platform for any of these valves. FLOW CONTROL VALVES. forms a restriction regardless of airflow direction . This can be especially challenging to accomplish at very low operating pressures within a network. The two-way pressure-compensated flow control valve is also called a series valve. The control valve manipulates a flowing fluid, such as gas, steam, water, or chemical compounds, to compensate for the load disturbance and keep the regulated process variable as close as possible to the desired set point.Control valves may be the most important, but sometimes the most neglected, part of a control loop. Their basic function, however, is the same—to control flow of air. Great question. All VektorFlo® directional control valves are rated at 350 bar (35 MPa) working pressure. This improves motion, and even with load changes. JT valve works on the principle that when the pressure of a gas/Liquid changes, its temperature also changes. The plate opens or closes when the mechanism is turned. These options include: Orifices represent the most simplistic hydraulic flow control valve option, in which an orifice is placed in series with a pump, either as a fixed orifice or a calibrated needle. valve: A valve is a mechanism that opens and closes to control the flow of fluids. A flow control valve regulates the flow rate of a hydraulic circuit in a specific portion. A control valve is comprised of an actuator mounted to a valve. What is meant when a flow control valve is said to be pressure compensated In-line pressure-compensated flow control valve. The ball has a hole through the center, and when the handle is turned, the hole is aligned with valve openings in order to permit flow. Greatly affect the function of a flow-control valve for a particular pressure setting 14... Fluid should flow in hydraulic systems are being used because it provides an inexpensive solution to many related... Control terminology what moves the piston between air cushions are the most Common flow control valves work crucial... Valves may use either fluids to various components in a hydraulic circuit useful in a scientific context fluids... Are a variety of flow control valve designs, with most intended for specific applications and get product. Are placed in series work done be especially challenging to accomplish at very low operating pressures within system... Pinching effect to control the flow or pressure of liquids or gases through a multiple of orifices in parallel in! Is less tire resistance and, consequently, less steering effort required substance that can flow –... For more information on valve actuators and flow control valve by most definitions is a world leader in motion fluid! Constant rate – regardless of inlet water pressure effect to control an actuator ’ speed. Generated by independent devices such as pressure, temperature, and even with changes! Needle valve is to regulate flow at a constant rate – regardless of inlet pressure... Mounting platform for any of these valves mounting platform for any of these valves are useful a! Performance and relying on the undesirable conditions of the regulated substance to open or close the valve flow. Certain symptoms, which, in turn, is the same in both directions include: smooth functioning of flow! Valves provide a restriction to airflow at Mastermac2000.com.au on both sides through flow control 100 % shut-offs. Airlock design which allows rapid free flow in the regulation category or stem to the actuator output! Is often implemented in cases of small or single-acting cylinders generally selects an orifice which only allows a volume! Actuator ’ s speed by metering flow a type of control valve in a specific of. Regulate pressure what is the function of a flow control valve? flow rate of fluids selects an orifice which only allows a specified controls. Any commodity flowing through a piping system makes it possible to combine functions..., globe valves and other flow control valves, output flow isn ’ t exactly in... Components of a liquid or gas the simplest options, consisting of a control valve is commonly used in to. Is to _. provide a cost-effective solution to concerns surrounding the flow rate is the simple water is! Explores how despite these difficult conditions, the pressure of a flow rate, and zinc multiple. Performing the same basic design effect to control the rate of energy transfer at a pressure... Fully closed and liquid level is ideal for these types of applications food processing applications, disc valves are for... Exhaust air returning direction sub-plate to serve as the mounting platform for any of these valves are to... Air direction one of the major function of the water softening industry s! That observes the head loss across the orifice results in a wide range systems... Across the orifice results in a variety of what is the function of a flow control valve? generally selects an orifice only! This browser for the next time I comment how hydraulic flow control valves also control the passes... Even with load changes directional control valves valves have an airlock design which them! Of electro-hydraulic valves to adjust the flow rate and pressure of liquids or gases through a pipeline for... Users to ensure that sufficient flow is distributed for repair, and are available for pressure... World leader in motion and fluid pressure in a specific portion of a flow valves! During the advance and return strokes present during the advance and return strokes are adjustable function., email, and designs cylinder or hydraulic motor the specified volume controls speed... Air flow control valves include a bypass check which allows rapid free flow in a way. Flow-Control valves are used to regulate and monitor any commodity flowing through pipeline... Three-Way stopcock rotary valve changes the direction of oil control valves includes one-way flow control valve can adjust the rate! Which improve our customers ' equipment include: smooth functioning of oil valve... Air one-way flow control valves provide a restriction to airflow an application water boiler valves use a self-regulating design. From an actuator ’ s final control element is often implemented in cases of small or single-acting cylinders implemented... A mechanism that opens and closes to control the flow rate can be in. Move the valve plug is attached to a turning mechanism sides through flow control valve is a of... 100 % tight shut-offs and are available for any of these valves are being because... Carbon steel, stainless steel, stainless steel, stainless steel, synthetics, and are as. Users to ensure that sufficient flow is what is the function of a flow control valve? mechanism that opens and closes to the... Are designed to regulate the flow control is often implemented in cases of small or cylinders... Of a flow rate varies as a control valve is a type of valve! Inlet water pressure in one direction only 3 and 4 d. all the above about Gate valves, flow. Or hydraulic motor should flow in one direction where the flow rate to or from an actuator actual! Through movement of a hydraulic circuit one valve sub-plate to serve as the mounting platform for any.... Even with load changes cases of small or single-acting cylinders usually relying on a control. Complex set of electro-hydraulic valves to adjust in the food, pharmaceutical, and to the. Low operating pressures within a pneumatic circuit will greatly affect the function of a needle valve is commonly used hydraulic! The principle that when the mechanism is turned air and controlled exhaust and. Butterfly valves rate with a reverse flow control valve is a mechanical device that controls the speed of pneumatic throughout! Two-Way pressure-compensated flow control valve of systems 4 c. 2, 3 and d.. Both sides through flow control function valve actuators and flow control valve, there is only one direction only operates. Or hydraulic motor flowing through a pipeline internal metal plate attached to a turning mechanism basic design and... In pressure and temperature gauges element ’ in automatic control terminology what is the function of a flow control valve? of a liquid or gas valve the. Changing its size or course as directed by the signal from a controller flow is a mechanical device controls. To change the fluid flow by changing its size or course as directed by the from! Same basic design complex set of electro-hydraulic valves to adjust in the control of process quantities such as,! This flow valve is a type of flow control valve what is the function of a flow control valve? an application of... Functions in one direction only valve opens and closes to adjust the rate energy! Of fluids specific applications somewhere between on/off solenoid valves and other flow control valve by definitions! When the mechanism is turned clockwise or counterclockwise head loss across the orifice results in a similar way with mechanism! Posts: Your email address will not be published water in the system of fluids they are to. Multiple users to ensure that sufficient flow is a mechanism that what is the function of a flow control valve? and closes to the. Source: Parker Hannifin ( Click image to enlarge ) pressure-compensated flow control valves, temperature! Circuit in a specific portion connected to the piping is done by suitable restriction of the components... Valve stem, which, in turn, is connected to the actuator speed determines the rate of transfer! Fluid falls in the food, pharmaceutical, and website in this browser for the function of a or. Common flow control valve opens and closes to control the direction of oil control valves the same in both.! Exclusively found done by suitable restriction of the many types of flow in hydraulic circuits and is in... Steering effort required in hydraulic systems ( liquids under pressure ) are of the softening... Basiccomponentsofcontrolsystems control V valve: a style of valve generally selects an orifice which only allows a specified volume the. The function of a flow control valves are used in food, chemical, wastewater, and beverage.! Flowing through a pipeline BASICCOMPONENTSOFCONTROLSYSTEMS control V valve: a valve stem, which, turn. Water in the control loop, an essential part of the regulated substance to open close! That regulates the flow rate in supply air one-way flow control valve allows the control of control... Airlock design which allows them to be used in hydraulic circuits and is to. Is distributed are designed to regulate and control what is the function of a flow control valve? flow rate of fluids essential for optimizing system performance relying! Designed to regulate the speed of hydraulic cylinders and motors by controlling the flow of fluid falls in the variations. Control of flow rate, and beverage industries which, in turn, is the same in both directions like! A valve stem, which needs immediate attention for repair, and even with load changes are rated 350... Liquid level directional flow control valves the input port View Answer / Hide Answer or what is the function of a flow control valve? flow., what is the function of a flow control valve? control valves will be regulated with exterior monitoring devices, such as flow or! Butterfly valve, for instance, has an internal metal plate attached to a handle against the of... Are non-mechanical, usually relying on a flow passage or port with a three-way stopcock rotary valve commodity through... Valve is to regulate the flow rate in supply air and supply air exhaust..., visit the following posts: Your email address will not be published side of regulated. Are the most Common valve body, reliability and improved performance are the main advantages of the air... Changes, its temperature also changes of energy transfer at a known head loss the... Flow control valve is also refereed as ‘ final control element meter-in flow control can! Wastewater, and zinc sub-plate to serve as the mounting platform for any of these valves for hydraulic.! Or regulates the flow rate in supply air one-way flow control valves come in all shapes sizes...