Categories Starting with 'P' (Page #9)

There are countless varieties of sandpaper, with variations in the paper or backing, the material used for the grit, grit size, and the bond. In addition to paper, backing for sandpaper includes cloth (cotton, polyester, and rayon), PET film, and "Fibre". Hyde glue is used for dry applications and resin for waterproof attachment of the grit which comes in a variety of grading.

A pilot valve is a small valve requiring little power which is used to operate a larger valve.

Plastic welding refers to any welding process that is used to join two or more sections of plastic. The most common method, and one of the primary processes of joining plastic sections, is by heat sealing, which can be accomplished with different techniques. Some of the heat-sealing methods used for joining plastic are contact welding, ultrasonic welding, laser welding, and hot gas welding.

Progressive cavity pumps are a type of single screw pump and are used for highly viscous liquids and liquids with significant amounts of solids such as cement or sand slurry. A screw-like rotor, usually made of steel, revolves in a cavity with an oval shaped cross section. The cavity is made of steel, plastic or rubber. Fluid proceeds from the entrance suction end of the pump, and is then propelled by the rotor to the discharge.

Portable conveyors are any type of transportable conveyor, usually having supports which provide mobility.