Quality assurance is a term covering all matters relating to the quality of a product or service, separately or collectively. ISO 9000 describes quality control as part of quality management that is geared towards quality requirements. Difference between QA and QC: QA is a collection of operations in the procedures through which products are created to …
Introduction Flow is an important physical quantity that needs to be controlled,monitored. There are so many flow measuring devices. lets discuss about Turbine flow meter. Working principle Turbine flow meter is used for translates the mechanical action of the turbine rotating in the liquid flow around an axis into a user readable rate of flow. …
What is Solenoid Valve ? How it works ? Animation  A solenoid is an electrical coil.When a battery is connected to the coil,a magnetic field is created.And pull the plunger or armature back.This opens the valve,allowing high pressure air to flow into the pneumatic cylinder.When the battery is disconnected,the plunger is pushed back closing …
What is Direct Acting ? Â Direct acting means that valves uses a power supply to open and close. Power is transformed into magnetic force,in a plunger type valve,forces a plunger to move and open or close the valve seats. Other direct acting valve operate without a plunger but with same principle of direct power …
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ELECTRICAL MOTOR DOL STARTER WORKING – ANIMATION Following States of DOL operation are shown in the animation 1.Starter at normal operation 2.Starting 3.Motor at overload condition 4.Normal Running 5.Stop DOL is used to start electric motors. Many types of electric motor starter is available.DOL is one of the simplest starter. It is composed of electrical …
Thermocouple Gauge Thermocouple gauge is a device used to measure low vacuum.Working of a Thermocouple GaugeIn Thermocouple Gauge a filament is heated by passing constant current through it.When gas molecule interact with filament heat is carried away.Therefor the temperature is directly depended on the pressure in the chamber.The higher the pressure the more molecule interact with …
Pirani GaugePirani gauge is a device used to measure low vacuum in a pressure range from 0.5 Torr to 10−4 Torr. Working Principle and Construction of Pirani gauge Pirani gauge consist of two tungsten filaments,a power source and a volt meter or ammeter.One of the filaments is placed to gauge tube and is exposed to the environment where the pressure …
What is Pirani Gauge ? Advantages,Disadvantages and Application of Pirani Gauge Read More »
What is a Pressure Switch ? A pressure switch turns an electric circuit on or off at a preset pressure.This pressure is referred to as the setpoint of the switch. A bourdon tube,a diaphragm, or a bellows can actuate the switch. How Pressure Switch Works? The contacts in a pressure switch may be normally open …
Electric Motors There are many types of Electric Motors used for a variety of purposes in commercial industry. Motor DirectionOne critical task must performed prior to installing a motor is determining the motors rotational direction.If a motor is required to rotate in a specific direction,it will have a direction arrow prominently displayed on the frame.But with …
Pressure Relief Valve Working PrinciplePressure relief Valve is one of the most important type of safety valve.This type of valves sets a limit on the rise of pressure within a hydraulic line.In normal operation the valve is closed and no fluid passes through.But if the pressure in the line exceeds the limit the valve opens …