Seminar control valve
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The document describes a continuous air control valve using particle excitation. The valve consists of an orifice plate, a PZT vibrator, and iron particles. It works by using air pressure to carry and deposit the iron particles over the orifice plate, normally sealing the airflow. Applying vibration from the PZT vibrator removes the particles from the orifice, allowing air to flow. The document discusses the working principle, design analysis, experimental evaluation of flow rate control, and conclusions.
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Components of pneumatic system
This document discusses the major components of a pneumatic system. It describes the following components: air compressor, receiver, air distribution lines, FRL (filter, regulator, lubricator) units, pneumatic control valves, pneumatic actuators, and air driers. It provides more detail on air compressors, pneumatic filters, pressure regulators, lubricators, and FRL units. Pneumatic valves are also discussed, noting that pressure control valves are normally open type and direction control valves are used to divert compressed air throughout the system.
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2) Simulation results show that implementing a hot bypass or cold bypass valve, in addition to the standard anti-surge control valve, can effectively prevent surge during an ESD event if the bypass valve has sufficient capacity. The hot and cold bypass concepts performed similarly in preventing surge.
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This document discusses the major components of a pneumatic system. It describes the following components: air compressor, receiver, air distribution lines, FRL (filter, regulator, lubricator) units, pneumatic control valves, pneumatic actuators, and air driers. It provides more detail on air compressors, pneumatic filters, pressure regulators, lubricators, and FRL units. Pneumatic valves are also discussed, noting that pressure control valves are normally open type and direction control valves are used to divert compressed air throughout the system.
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Please subscribe to my YouTube Channel for best training lectures:
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3. The suction side speed control and equal flow balance methods aim to control both compressors independently using a master pressure controller and additional elements, but have disadvantages related to complexity and control dynamics.
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This document discusses pneumatic and hydraulic symbols and systems. It covers:
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- Key parameters of hydraulic systems like reservoir size and pump flow rate and pneumatic systems like compressor pressure and pump flow rate.
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This case study describes a compressor (C-1714) tripping due to low surge flow. The surge flow dropped to 0 Nm3/Hr below the alarm limit of 700 Nm3/Hr. Potential causes identified include condensate not being released from the air trap, high ambient temperatures, and foreign material choking the air trap valve port. Permanent countermeasures proposed include installing a new ball float type air trap to replace the existing inverted bucket type, cleaning the compressor impeller blades, and conducting a performance test.
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The document discusses various pneumatic circuits used to control actuators like cylinders. It begins by identifying components in pneumatic circuits like cylinders labeled A, B, C etc. and associated feedback valves. It then provides examples of basic circuits to control single-acting and double-acting cylinders using 2/2, 3/2 and 5/2 directional control valves. It also discusses adding flow regulators for independent speed control and different modes of operation like manual, semi-automatic and fully-automatic control. Finally, it discusses building blocks for designing repeat and non-repeat sequence circuits and solving issues that can arise with opposed signals in non-repeat sequences.
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The 14.25 mile long, 6-inch diameter jet fuel pipeline starts at a pump station near fuel tanks 30002 and 30003 and ends at an Air Force Base fuel depot. It is monitored for leaks during fuel transfer operations by comparing the fuel volume measured entering and exiting, and when static by watching for unexplained pressure drops exceeding 15 psi. Critical components include isolation valves, pressure relief valves, and a cathodic protection system running the length of the line to prevent corrosion.
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Surge occurs when the pressure behind a centrifugal compressor becomes higher than the outlet pressure, causing fluid to reverse flow into the compressor. This unstable phenomenon repeats in cycles around 1-2 Hz. To prevent surge, anti-surge control systems detect when the operating point approaches the surge line and open a recycle valve to increase inlet flow and move the operating point away from the surge line. Proportional-integral and proportional-integral-derivative algorithms are commonly used to control the recycle valve based on differences between the process variable and set point.
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Pneumatics uses compressed air to transmit power in industrial applications. Some key points:
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This document discusses pneumatic circuit design and analysis. It describes the basic elements of a control chain, including direct and indirect control. Examples of components in pneumatic circuits are provided, such as shuttle valves for OR logic and dual pressure valves for AND logic. Specific circuits are examined, like one that uses a double pilot directional control valve for memory function. The document explains how pneumatic components work together in circuits to control cylinders and other devices.
Final Control Element
Final control elements are devices like valves and pumps that adjust the manipulated variable to control process parameters. Common parameters include pressure, flow, level, and temperature. Control valves have components like actuators, bodies, and trim. Actuators provide the force and include pneumatic, hydraulic, and electric types. Valves types are ball, butterfly, gate, and globe valves. Positioners maintain the correct valve position. Control valves can experience issues like leaks, sticking, or nonlinear flow. Troubleshooting addresses problems like deadband, overshoot, sizing errors, and nonlinear characteristics.
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Seminar control valve
- 1. CONTINUOUS AIR CONTROL USING PARTICLE EXCITAION VALVE REPRESENTED BY:- LIPSAACHARYA REGD NO.:-1151015004 BRANCH:- EIE (C)
- 2. CONTENT :- INTRODUCTION WORKING PRINCIPLE AND DRIVE CONDITION DESIGN AND ANALYSIS BASIC CALACTERLISTIC EXPERIMENTAL EVALUATION OF FLOW-RATE CONTROLLABILITY CONCLUSION REFERENCES
- 3. INTRODUCTION:- control pneumatic actuators, miniaturization and high controllability are demanded for flow control valve. Because pneumatic actuator control is not easy in consequence of air compressibility, these control system tend to be large.
- 4. WORKING PRINCIPLE AND DRIVE CONDITION:- flow-control valve consists of an orifice plate, a PZT vibrator, and iron particles. By supplying air pressure, the air flow carries and deposits particles over the orifice. This valve is normally closed because particles seal the air flow. When air flow carries and deposits particles over the orifice, the pressing force of the particles is calculated using the following equation. F = pir2P + mg The dynamic force of the particles applied by the PZT vibrator depends on the particle mass, displacement, and input frequency, which is expressed by F2 particles, and is the angular frequency when the driving frequency f is defined as = 2f.
- 5. CONT…….