Mechanical Vacuum Pumps and Systems Specifications

Help with Mechanical Vacuum Pumps and Systems specifications:

Operating Vacuum

	Ultimate Operating Vacuum:		Vacuum or pressure is often measured in torr, or mm Hg referenced above absolute zero pressure. Sometimes the following reference terms are used: 1 torr and above: Rough Vacuum 0.001 to 1.0 torr: Medium Vacuum Below 0.001 torr: High Vacuum There are other terms and standards used, such as medium vacuum and ultra high vacuum; consult supplier for application specifications.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

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Pumping Speed

	Pumping Speed:		Pumping speed or air volume capacity of the vacuum pump.  Vacuum pumps are flow rated according to the volume of air exhausted with no pressure differential across the pump.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

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Applications

	Applications
	Your choices are...
	General Purpose / Industrial		General purpose uses covers a wide range of industrial and manufacturing applications.
	Analytical / Scientific		Analytical or scientific applications include electron microscopes, analytical spectrometers, or physics experimentation.
	Chemical / Corrosive Gas		Designed for use with chemicals and/or corrosive gases and vapors.
	Food Processing		Food processing applications include freeze drying, conveying, and sanitary packaging.
	Manufacturing Processing		Vacuum pumps designed for use in manufacturing applications such as plastics vacuum forming, degassing, vacuum sintering and casting, etc.
	Medical / Laboratory		Specialized for use in highly specialized medical or biomedical laboratory applications.
	Packaging		Vacuum packaging applications include shrink-wrapping and packaging of food, candy, electronic and medical devices and components.
	Power Generation		Applications such as condenser venting and vapor recovery in power generation systems such as hydroelectric, nuclear, or fossil fuel power generation.
	Pharmaceutical / Sanitary		Sanitary applications, such as pharmaceutical or food and beverage processing, require features such as sterilizability, nonabsorbent seals, and other clean components.
	Semiconductor Manufacturing		Designed specifically for the demands of semiconductor, chip, or board manufacturing applications.
	Other		Other unlisted, specialized, or proprietary application.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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Type / Technology

	Pump Type / Technology
	Your choices are...
	Axial Blower		Axial blowers are multiple-blade rotors that imparts axial velocity which is converted to pressure. Axial blowers generally have very high flow rates.
	Centrifugal Blower		Centrifugal blowers are high-speed impellers that produces radial air flow. Velocity is converted to pressure energy. Evacuated air flows radially outward against blower wall, as opposed to axially through tube axial blowers.
	Circumferential Piston		Circumferential pistons have multiple-rotor configurations in which two rotors, each with two "wings". The wings trap air against the outside wall during rotation and compress it in their rotary stroke toward the outlet. The wings of the two rotors alternate in compression strokes.
	Claw		Claw or rotary claw pumps use precision-designed intermeshing hooked claws with very tight tolerances and clearances for highly efficient internal compression. They are typically noncontact, minimizing, or eliminate friction and wear.
	Diaphragm		Diaphragm oscillation is driven by a reciprocating or eccentric "rocking" rod with no sliding seals or parts. This design isolates the pumped fluid from any contact with the pumping mechanism.  Diaphragm pumps exhibit a much lower compression ration than piston pumps, but frequently offer quiet, economical performance.
	Gear Pump		Gear pumps are positive displacement pumps used to transport high pressure and high volume flows. They use the meshing of gear teeth to reduce volume and move air to evacuate the vacuum chamber.
	Linear		Linear pump technology uses the stroke of sliding piston compression. It is generated with electromagnetic oscillation, and is clean and quiet.
	Liquid Ring		Eccentrically mounted rotors and vanes utilize liquid ring on the inside of chambers to compress air. The liquid also absorbs compression heat and entrained particles in the air.
	Lobed Rotor		Lobed rotor technology traps air and compresses it by the diminishing volume, which is caused by the meshing of oppositely rotating lobes.
	Reciprocating Piston		Reciprocating pistons mechanically reduce air volume inside a cylinder. These pumps may have one or several pistons being driven by a motor. The vacuum levels produced by this pump style are somewhat higher than for other types of mechanical pumps.
	Regenerative Blower		Regenerative blowers are similar to centrifugal with airflow chambers designed to generate higher pressure. Air flows radially outward along blade to housing wall, whereupon it flows down to the root of the next blade gap and repeats the cycle.  The airflow thus creates several "stages" of compression.
	Rocking Piston		Rocking pistons are similar to reciprocating pistons, but are not articulated. These pistons "rock" with eccentric motion of drive.
	Rotary Piston		Rotary pistons or cams rotate eccentrically and evacuates air through a check valve on the "compression" or evacuation stroke, while air from the vacuum application fills in behind it.
	Rotary Vane		Rotary vanes are eccentrically mounted rotors and sliding vanes that compress air in diminishing volume compartments.
	Rotary Screw		Rotary screws have two or more spindles with intermeshing screws that rotate oppositely, creating axially progressing "chambers" that move the air from suction to discharge. Larger pumps often have double suction, where air is let in from both ends to a central discharge port. Rotary screw pumps often offer good vacuum levels with pulse-free operation.
	Scroll		In scroll technology, air is moved as intake air is compressed between the surfaces of mating involute spirals. One spiral moves to progressively push the evacuated air out to the exhaust.
	Other		Unlisted, specialized, or proprietary mechanical vacuum technology.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
	Configuration
	Your choices are...
	Individual Vacuum Pump		Individual vacuum pump are typically for insertion into or used with a larger system or process.
	Combination / Multi-Technology Pump		Multi-technology pumps have two or more different technologies or capacity pumps stacked together to increase capacity, or take advantage of the features of each type.
	Vacuum Pump System / Station		Vacuum systems can include multiple pumps and associated piping, valves, controls, receivers, etc. These pumps can also indicate centralized vacuum sources for manufacturing or automation cells or plants.
	Search Logic:		Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.
	Compression / Pressure Service		Some vacuum pumps may be used for compression of air or other gases.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

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More Specs

	Lubrication:
	Your choices are...
	Dry / Oil-less		Dry or oil-less lubrication styles use permanently sealed bearings or other isolation technology eliminate oil in the fluid train.
	Splash Lubrication		Oil splashes onto components from bath.
	Oil-flooded		Oil-flooded lubrication is sometimes used in rotary vane and other mechanical pump styles. This type of lubrication involves a heavy application of oil for moving parts.
	Positive Pressure		In positive pressure lubrication, oil pressure is maintained for highest level of lubrication.
	Other		Other unlisted or specialized lubrication technique.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
	Operating Temperature:		This is the full required range of ambient operating temperature.
	Search Logic:		User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
	Motor Power:		Motor power is a reference value used to characterize vacuum pump size.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Power Source
	Your choices are...
	None		Not having a power source is an option for some high vacuum pumps such as turbomolecular, where vacuum is increased by molecular absorption rather than mechanically moving parts.
	Compressed Air / Fluid		In compressed air / fluid systems, power is derived from nonelectric media such as motive fluid. Compressed air is most common, but hydraulic or other power sources are possible.
	DC Power		DC power includes battery and power supply inputs.
	AC Single Phase		Single-phase AC motor voltages include 115V/60Hz and 230V/50Hz.
	AC Three Phase		Many industrial devices run from three phase power such as 208V or 377V.
	Engine		Pumps whose primary power comes from an engine, such as a gasoline or diesel engine.
	Magnetic Drive		Magnetic drives typically use a rotating magnetic field to drive the pump impeller. This can allow for seal-less construction and is often used for pumping clean liquids or gases.
	Other		Other unlisted or specialized power source.
	Search Logic:		Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.
	Mounting & Features
	Your choices are...
	Benchtop		Benchtop mounting is used for products small enough to mount or be placed on a bench or table. These models may include portability.
	Cart / Portable		Portable mounts include wheels, casters, or easily movable frames for frequent relocation.
	OEM Controller / Control Panel		Vacuum pump or vacuum system has an integral OEM controller or control panel consisting of adjustment controls more than a simple regulator knob.
	Floor / Skid		The device rests on floor or on a skid; they are typically used for larger vacuum pumps.
	Gas Ballast		Atmospheric air is allowed into the compression chamber to minimize condensate in the oil and prevent corrosion.
	Integral Trap(s)		Traps are used to prevent backstreaming and resultant contamination from roughing pumps in high vacuum or sanitary applications. There are various trap types or technologies designed for the prevention of chamber entry by oil or water vapor, hydrocarbons, etc.
	Magnetic Bearing		A vacuum pump may utilize magnetic bearing where the rotor is lifted using magnetic levitation. Magnetic levitation in magnetic bearings eliminates contact and contact friction between the two surfaces.
	Permanent Installation		Permanent installation is used with very large systems or stations that are installed permanently in one place.
	Valve Sequencing Control		Sequence control of valve opening is critical, especially in a high vacuum system. This option denotes pumps with valve control.
	Vacuum Gauge		Vacuum gauges have a dial, numeric, or other readout of pressure.
	Other		Other unlisted, specialized, or proprietary mounting style.
	Search Logic:		Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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