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Pneumatics

Being the driving force behind most factory, manufacturing, mining machinery, heavy vehicles and equipment, pneumatics are a vital part of our industry today. The field of pneumatics is vast and knowledge is constantly requested in the workings and troubleshooting thereof.

464 Questions

Is a pneumatic system open or closed?

A pneumatic system is typically considered a closed system. This means that the air or gas used for power is contained within the system and circulates through it without being released into the environment. However, during operation, some air may escape, but the overall design aims to minimize such losses.

Would 100 psi air supply be enough for 50-100 cubic feet per hour?

The pressure that a compressor produces is not the capacity of the compressor. Most small compressors will produce 100 psi pressure but how many cubic feet of air they can move in a given time varies greatly. For instance a small single phase hobby compressors will supply around 7 cfm (cubic feet per minute) at about 80 psi. Which is plenty for spraying but would struggle to supply most air tools. So that these small compressors can be more useful they usually have an air receiver to store the compressed air. This allows the unit to supply larger amounts of air for short periods of time thus overcoming some of the limitations of the small unit. For lower pressures (30-40 psi) a vane compressor is capable of supplying much higher volumes of air (cfm's) for its size.

Is Hydraulics More Effective Then Pneumatics?

My thoughts go like this...(from watching 'Scrapheap Challenge"0 plus a little basic knowledge of physics.

1/ Pneumatics involve the movement of pistons and what not via the medium of compressed air or air under pressure.

2/ Hydraulics involve the movement of pistons and what not via the medium of compressed fluids or fluid under pressure.

3/ Fluid is denser than gas (compressed air).

I believe hydraulics can handle far heavier loads than pneumatics.

Pneumatics would appear to use a lighter more flexible medium than hydraulics.

In answer to your question, I believe hydraulics would be far more effective at manipulating heavy loads versus pneumatics.

However, pneumatics would be a more flexible system than hydraulics.

Hows that?

What is pneumatic structures in architecture?

Pneumatic structures in architecture are designs that utilize air pressure to maintain their shape and stability, often incorporating lightweight materials like fabrics or membranes. These structures can be rapidly deployed, offering flexibility and adaptability for various uses, such as temporary installations or shelters. They are known for their efficiency, energy-saving potential, and unique aesthetic appeal. Common examples include inflatable buildings, air-supported roofs, and tensile fabric structures.

What are the different types of electro pneumatics valve?

Electro pneumatic valves are mechanical valves but operated through pneumatic using suitable solenoid coils.

How pneumatic system work?

Pneumatic tube systems today are most seen at the drive-through windows of banks. Pneumatic tubes use pressured air to push a sealed object through the system.

how do pneumatic truck trailers work?

Who invented pneumatics?

Pneumatics have been used for thousands of years, ever since hunters used the blow-gun to take down their prey.

How does stroke and diameter affect pneumatic system?

The performance of a pneumatic system is dependent upon the air displaced or handled, which is directly proportional to the stroke and diameter. In other words, it is to be considered like a cylinder whose volume increases with diameter and length.

What is a pneumatic vice?

A clamp or vice that uses pneumatic power to close and hold pressure upon a part. Pneumatic means air. In this context compressed air.

How do you put on landing legs on a semi step deck trailer?

They're bolt-on components. You'll need an impact wrench, and a torque wrench to ensure that you torqued the bolts properly (which is very important, given the function of the landing gear).

What is the basic principle of pneumatic control valves?

Compressed air brake systemCompressed air brake systems are typically used on heavy trucks and buses. The system consists of service brakes, parking brakes, a control pedal, an engine-driven air compressor and a compressed air storage tank. For the parking brake, there is a disc or drum brake arrangement which is designed to be held in the 'applied' position by spring pressure. Air pressure must be produced to release these "spring brake" parking brakes. For the service brakes (the ones used while driving for slowing or stopping) to be applied, the brake pedal is pushed, routing the air under pressure (approx 100-125psi) to the brake chamber, causing the brake to reduce wheel rotation speed. Most types of truck air brakes are drum units, though there is an increasing trend towards the use of disc brakes in this application. The air compressor draws filtered air from the atmosphere and forces it into high-pressure reservoirs at around 120 PSI. Most heavy vehicles have a gauge within the driver's view, indicating the availability of air pressure for safe vehicle operation, often including warning tones or lights. Setting of the parking/emergency brake releases the pressurized air pressure in the lines between the compressed air storage tank and the brakes, thus actuating the (spring brake) parking braking hardware. An air pressure failure at any point would apply full spring brake pressure immediately. Design and functionA compressed air brake system is divided into a supply system and a control system. The supply system compresses, stores and supplies high-pressure air to the control system as well as to additional air operated auxiliary truck systems (gearbox shift control, clutch pedal air assistance servo, etc.). Supply system

" Over simplified" air brake diagram on a commercial road vehicle (does not show all air reservoirs and all applicable air valves).

The air compressor is driven off of the engine either by crankshaft pulley via a belt or directly off of the engine timing gears. It is lubricated and cooled by the engine lubrication and cooling systems. Compressed air is first routed through a cooling coil and into an air dryer which removes moisture and oil impurities and also may include a pressure regulator, safety valve and a smaller purge reservoir. As an alternative to the air dryer, the supply system can be equipped with an anti freeze device and oil separator. The compressed air is then stored in a reservoir (also called a wet tank) from which it is then distributed via a four way protection valve into the front and rear brake circuit air reservoir, a parking brake reservoir and an auxiliary air supply distribution point. The system also includes various check, pressure limiting, drain and safety valves.

Control system

The control system is further divided into two service brake circuits: the parking brake circuit and the trailer brake circuit. This dual brake circuit is further split into front and rear wheel circuits which receive compressed air from their individual reservoirs for added safety in case of an air leak. The service brakes are applied by means of a brake pedal air valve which regulates both circuits. The parking brake is the air operated spring brake type where its applied by spring force in the spring brake cylinder and released by compressed air via hand control valve. The trailer brake consists of a direct two line system: the supply line (marked red) and the separate control or service line (marked blue). The supply line receives air from the prime mover park brake air tank via a park brake relay valve and the control line is regulated via the trailer brake relay valve. The operating signals for the relay are provided by the prime mover brake pedal air valve, trailer service brake hand control (subject to a country's relevant heavy vehicle legislation) and the prime mover park brake hand control.