• ## Diaphragm Seal and Instrument Assembly

### Working of Pressure Reducing Valve

Introduction This Pressure Reducing Valve is an elastomeric, line pressure driven pilot operated pressure control valve. Designed specifically for advanced fire protection systems and the latest industry standards. This Pressure Reducing Valve reduces high upstream pressure to a precise, preset, stable downstream pressure….

### What is a flapper nozzle mechanism?

Introduction  The flapper nozzle is the primary device for all pneumatic instruments which convert a measurement to a pneumatic signal.  Figure shows the layout of the device.  Principle of Operation: The air supply input (20 psi (1.4 bar)) passes through a restrictor…

### Working of I/P Transducer.

Introduction I/P Transducer accepts an electrical input signal and produces a proportional pneumatic output.In this session we are going to discuss about how I/P transducer works. To know about I/P converter calibration Principle of Operation Electronic Circuit The input current signal i.e….

### Mechanical pressure transducers and elements

Mechanical Pressure transducers: In general, transducers are devices which converts one form of energy into another form, a pressure transducer converts pressure into any other measurable form of energy. A mechanical pressure transmitter converts the pressure into mechanical displacement in the system. Types…

### Pressure – Reducing valves and its Applications

Pressure reducing valve is a type of pressure control valve. This type of valve is used to maintain constant reduced pressure in a pipeline where the flow is fluctuating. This type of valve (which is normally open) is used to maintain reduced…

### Basics of Pressure Scales

Introduction There are three pressure scales used for measuring pressure.   The Absolute pressure scale The Gauge pressure scale The Vacuum pressure scale               In the pressure gauges shown in Figure all pressure gauges show a reading of 20, but their values of…

### What are pneumatic controllers ?

Introduction A controller is a device that senses differences between a desired condition and measured condition in a process. .The controller will reduce this difference with the help of final control elements in the process.If the final control element is control valve…

### what are pressure relief valves?

INTRODUCTION Protection against over pressure is one of the most important design tasks in the chemical, petrochemical, oil, and gas industries.pressure relief valves are such instruments that protect the plant form over pressure scenario  The various causes of over pressure fall into…

### Capacitance pressure transmitter

Capacitance pressure transmitter is a pressure measurement device which convert applied pressure into a current signal. Capacitive type pressure transmitter is differential pressure type sensor. Principle: Capacitive pressure transmitter works under the principle of differential capacitance. Capacitive pressure measurement involves sensing the change…

### Pressure Detectors

Introduction There are different kinds of pressure sensing elements that are used in the industries.we are going to discuss about such pressure detectors in this session. Bourdon Tubes Bourdon tubes are circular-shaped tubes with oval cross sections. The pressure of the medium acts…

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