Hydraulics is a mechanical system that works by the force of liquid pressure. In hydraulic systems , mechanical motions are created by compressed, pumped liquids, usually pushing pistons via cylinders. Hydraulics is a part of mechatronics that incorporates mechanical engineering, electronics and software engineering in the design and manufacture of products and processes.

First of all, all pneumatic and hydraulic systems are fluid control systems. Pneumatics uses easily compressible medium such as air or an acceptable pure medium, while hydraulics use fairly incompressible liquid media such as gasoline. In general, the pneumatic system has a lower load capacity than the hydraulic system. Oil or other liquid leakage occurs in hydraulics, although it does not occur in pneumatics due to the use of steam. For a hydraulic system, you need an oil tank to add oil to the system, and in a pneumatic system, you can add air from the atmosphere. Application Pneumatic systems widely used in industry are usually operated by compressed air or compressed inert gases. Centrally positioned and electrically driven compressors drive tubes, air motors and other pneumatic equipment. Pneumatics also has applications in dentistry, construction , mining and other fields.

Although all the responses below are theoretically correct, they are more than you need to ask. In Layman 's theory, hydraulic pressure is created by resistance to flow. A prime mover, such as an electrical motor, is connected to a hydraulic pump. The engine transforms the pump to generate pressure as it transfers the hydraulic fluid from the tank to the machine. When the fluid moves through the connectors, the fluid experiences resistance from the inside surface and generates additional resistance every time the fluid encounters a fitting that can reduce the size of the connector.There is resistance when it goes through the pipe, the fluid needs to flow straight, and as it can not generate friction when it reaches the resistance. By the end of the day, the fluid travels through the actuator like a hydraulic lever and meets the maximum resistance as it drives the piston head that is attached to a rod that transfers power to the heavy load you 're trying to pass. Pressure builds up until there are enough Pounds per square inch to overcome all friction, resistance and load. It is the point of departure and the point at which the load passes.

Tube fittings are important to prevent leakage. Considerations for the prevention of leaks include the types of connecting devices used for joining process pipes throughout the system, and the level of experience of installing and maintaining the application. Learning important design, installation and maintenance tips and warnings for different types of fittings can minimize potential fluid handling problems and improve overall performance. It works through a chemical process, and the zinc layer is coated over the steel. These pipes are highly corrosion resistant, making them ideal for making pipe fittings and pipe fittings.

There's not always a difference, but there are a few aspects that could make them different. Hydraulic cylinder seals typically seal with higher pressure so that the clearances appear to be narrower between the piston and the cylinder or the rod and the tube gland so that the seal can't extrude through the gap. The cross section of the seal can also be more durable for the same reason. Pneumatic seals need to be handled without sufficient lubrication, so that the structure and materials can often be different. It's hard to be precise without a particular seal in mind. I 'm talking about cylinder seals here. The O-rings will be constructed to the same norm. Shaft seals may be entirely different.