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A dust collector is a system used to enhance the quality of air released from industrial and commercial processes by collecting dust and other impurities from air or gas. Designed to handle high-volume dust loads, a dust collector system consists of a blower, dust filter, a filter-cleaning system, and a dust receptacle or dust removal system.
The first launch of the Delta IV Heavy on 21 December 2004 carried a boilerplate payload and was a partial failure. Cavitation in the liquid-oxygen propellant lines caused shutdown of both boosters eight seconds early, and the core engine nine seconds early; this resulted in a lower staging velocity for which the second stage was unable to compensate.
A blast gate is a gate valve used to focus a dust collection system's vacuum pressure for maximum dust (or other material) extraction at the desired location. Blast gates are positioned near individual pieces of machinery and operate by being closed by default, blocking air flow.
This is a list of launches made by the PGM-17 Thor IRBM, and its derivatives, including the Delta family and the Japanese N-I, N-II and H-I rockets which were based on license-produced components. Due to the number of launches, it has been split by decade: List of Thor and Delta launches (1957–1959) List of Thor and Delta launches (1960–1969)
The air-to-cloth ratio is the volumetric flow rate of air (m 3 /minute; SI m 3 /second) flowing through a dust collector's inlet duct divided by the total cloth area (m 2) in the filters. The result is expressed in units of velocity .
This flexing of the bags breaks the dust cake, and the dislodged dust falls into a storage hopper below. Reverse pulse-jet dust collectors can be operated continuously and cleaned without interruption of flow because the burst of compressed air is very small compared with the total volume of dusty air through the collector.