National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

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Development of an Improved Type of Coal Mine Dust Sampling Pump.

PB240661

Publication Date	1974
Page Count	22
Abstract	The purpose of this research contract was to develop an improved dust sampling pump with an electrical to mechanical energy conversion efficiency superior to that of the available equipment. Any increase in efficiency would allow the size and weight of the pump to be reduced. The pump was to operate at 9 liters-per-minute at 20 cm of water vacuum. A prototype piston pump driven by a linear actuator was constructed. Flow rate was automatically regulated using a flow sensing thermistor and a feedback circuit to drive the linear actuator. However, the efficiency of the pump was only 1.6 percent which is less than that of conventional air sampling pumps.
Keywords	Piston pumps Gas sampling Coal mines Dust collectors Air Efficiency Specifications Design
Source Agency	Bureau of Mines
NTIS Subject Category	94F - Tooling, Machinery, & Tools 99A - Analytical Chemistry
Corporate Authors	Wallace-Fisher Instrument Co., Swansea, Mass.; BUREAU OF Mines, Washington, D.C.
Document Type	Technical Report
Title Note	Research rept.
NTIS Issue Number	197512
Contract Number	H0133109

Development of an Improved Type of Coal Mine Dust Sampling Pump.

Development of an Improved Type of Coal Mine Dust Sampling Pump.
PB240661

Publication Date	1974
Page Count	22
Abstract	The purpose of this research contract was to develop an improved dust sampling pump with an electrical to mechanical energy conversion efficiency superior to that of the available equipment. Any increase in efficiency would allow the size and weight of the pump to be reduced. The pump was to operate at 9 liters-per-minute at 20 cm of water vacuum. A prototype piston pump driven by a linear actuator was constructed. Flow rate was automatically regulated using a flow sensing thermistor and a feedback circuit to drive the linear actuator. However, the efficiency of the pump was only 1.6 percent which is less than that of conventional air sampling pumps.
Keywords	Piston pumps Gas sampling Coal mines Dust collectors Air Efficiency Specifications Design
Source Agency	Bureau of Mines
NTIS Subject Category	94F - Tooling, Machinery, & Tools 99A - Analytical Chemistry
Corporate Authors	Wallace-Fisher Instrument Co., Swansea, Mass.; BUREAU OF Mines, Washington, D.C.
Document Type	Technical Report
Title Note	Research rept.
NTIS Issue Number	197512
Contract Number	H0133109