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2. Pneumatic lubricator - Wikipedia

   en.wikipedia.org/wiki/Pneumatic_lubricator

   A pneumatic lubricator injects an aerosolized stream of oil into an air line to provide lubrication to the internal working parts of pneumatic tools, and to other devices such as actuating cylinders, valves, and motors. Compressed air enters the inlet port and passes over a needle valve orifice attached to a pick-up tube.

3. How Much Does It Cost to Replace a Water Heater? - AOL

   www.aol.com/lifestyle/much-does-cost-replace...

   In addition to the cost of the water heater, make sure to account for these additional expenses. Permits. Permits for a hot water heater replacement usually cost between $25 and $300, depending on ...

4. Pneumatics - Wikipedia

   en.wikipedia.org/wiki/Pneumatics

   A centrally located and electrically-powered compressor powers cylinders, air motors, pneumatic actuators, and other pneumatic devices. A pneumatic system controlled through manual or automatic solenoid valves is selected when it provides a lower cost, more flexible, or safer alternative to electric motors, and hydraulic actuators.

5. Hydraulic seal - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_seal

   Ensures that fluid does not leak from the cylinder and adequate pressure is maintained. [5] Wiper seal: Is installed on the outside of the cylinder. Its main function is to prevent dirt, debris, and other contaminants from entering the hydraulic system. Other types of dynamic seals include chevron seals, U-cup seals, and labyrinth seals.

6. Head gasket - Wikipedia

   en.wikipedia.org/wiki/Head_gasket

   When installed, the four large holes will align with the cylinders. In an internal combustion engine, a head gasket provides the seal between the engine block and cylinder head(s). Its purpose is to seal the combustion gases within the cylinders and to avoid coolant or engine oil leaking into the cylinders. [1]

7. Automatic bleeding valve - Wikipedia

   en.wikipedia.org/wiki/Automatic_bleeding_valve

   An automatic bleeding valve or air release valve (ARV) is a plumbing valve used to automatically release trapped air from a heating system. Air, or other gas, may collect within plumbing. For water delivery systems to taps and basins, particularly with good main supply pressure, this air is usually flushed through with the water flow and does ...