Categories Starting with 'D' (Page #3)

A dosing pump is a low-volume fluid pump with controllable discharge rate used to inject chemical additives to the mixing or pumping system. Dosing pumps frequently are used to inject fluids that may be difficult to mix efficiently in batch-tank systems because of their low volume.

Directional control valves are valves in a fluid power system that direct the flow of fluid to a particular point and at a particular time to power a device such as a hydraulic piston. It is also known as a selector valve, transfer valve, or control valve. In hydraulic systems the directional control valve is ported through a return line to a reservoir and in pneumatic systems the directional control valve is ported through an exhaust port to the atmosphere.

A drum pump is a small powered pump with an extended suction duct that is designed to pump fluid from a container into another container or process. A drum pump is very similar to a barrel pump.

Dowel pins are widely familiar fasteners engaged for assembling fixtures and jigs. They are industrial pins utilized to prevent slippage or motion. These pins possess ground cylinder-shaped sides featuring a pair of chamfered ends. These pins are employed where it is imperative to locate mating parts precisely, but with relatively lesser extent of wear or shock risks. They frequent as a hinge, plug gage or shaft. Their capability for precise tolerance renders them excellent devices for imparting appropriate alignment of parts in high-speed assemblages.

Ductless fume exhaust hoods are self-contained workspace usually equipped with high efficiency particulate air (HEPA)-filtered enclosures and/or carbon filters, engaged to isolate and eliminate noxious organic vapors, particles and fumes emanating from any laboratory application. Air is drawn in via a fan, is purified by filtration and re-fed into the room. These hoods are provided with numerous provisions to accommodate mounting of particle filters and purification filters, which remove the objectionable fumes thereby creating conducive ambience for the release of the purified air. Hoods of this type are popular in applications where construction of duct is too expensive or structurally infeasible.