Copy of Copy of Pneumatics Applications

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Pneumatics Technology :

Pneumatics Technology Air is used as a medium to transmit power ADVANTAGES: Low Cost as compared to other systems Choice of Movement i.e linear and rotory Storage of compressed air is easy Reliability Speed Control Simple in design and control Safety Clean System

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Pneumatics Applications Operation of Heavy Doors Clamping Operations Pick & Place Operations i.e Material Transfer Shearing & Punch Presses Forming Operations Machine tools, work or tool feeding Pneumatic Robots Bottling & Filling Machines

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MAIN COMPONENTS A source of energy supply i.e. Air Compressor Air Receiver Air Cleaning/ conditioning system Pipe Network Pressure Control Elements Flow Control Elements Direction Control Elements ACTUATORS ( for delivery of mechanical work)

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Piston (3 -7 bar range)

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Compressor Rating – described as displaced volume Q (lt/min) = piston area x stroke length x number of cylinders x rpm Specific Energy Consumption – 1 kW of electrical energy is needed for production of 120 -150 l/min of compressed air at 7 bar . Pressure Rating – SI Units - Pascal (Pa) , 1 Pa = 1 N/m 2 Metric Units – bar , 100,000 Pa = 1 bar OR kgf/cm 2 , 1 kgf/cm2 = 0.98066 bar , = 14.22 psi English Units – lbf/sq. inch (psi), 1 bar = 14.5 psi

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AIR RECEIVER FUNCTIONS Store sufficient amount of air. Cooling of air Oil separation Moisture Condensation SIZING AIR RECEIVER Air receiver Capacity = Compressor output of compressed air/min. (Not Free Air Delivery) EXAMPLE: Compressor Delivery = 18 m 3 /min (free air) at 7 bar COMPRESSED AIR OUTPUT = 18000/7 = 2500 litres (approx) = RECEIVER SIZE

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ACTUATORS

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DIRECTIONAL CONTROL VALVES FORWARD BACKWARD NEED OF A DCV ?

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DIRECTIONAL CONTROL VALVES Determines the direction of air flow. Described in terms of – Number of Ports Number of Positions Normal Position Method of Actuation

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DIRECTIONAL CONTROL VALVES

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DIRECTIONAL CONTROL VALVES

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DIRECTIONAL CONTROL VALVES

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DIRECTIONAL CONTROL VALVES

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DIRECTIONAL CONTROL VALVES

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DIRECTIONAL CONTROL VALVES

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DIRECTIONAL CONTROL VALVES

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DIRECTIONAL CONTROL VALVES

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DIRECTIONAL CONTROL VALVES

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DIRECTIONAL CONTROL VALVES

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DIRECTIONAL CONTROL VALVES

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DIRECTIONAL CONTROL VALVES METHODS OF ACTUATION Manual Pneumatic Pilot Solenoid Solenoid Pilot

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CHECK VALVE

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TWIN PRESSURE VALVE AND LOGIC Device

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SHUTTLE VALVE

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QUICK EXHAUST VALVE Allows increased speed of piston by exhausting the cylinder directly to its port

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FLOW CONTROL VALVE

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FLOW CONTROL VALVE

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TIME DELAY VALVE

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TIME DELAY VALVE

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