Vacuum Pumps and Vacuum Generators Specifications

Help with Vacuum Pumps and Vacuum Generators 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.

Pumping Speed


	Pumping Speed:		Pumping speed or displacements relates to the 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.

Vacuum Pump Type


	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		A vacuum pumping unit consisting of two or more pumps or stages using different technology, which are coupled or 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:		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.

	Mechanical Pump Type:
	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 Mechanical Type		Unlisted, specialized, or proprietary mechanical vacuum technology.
	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.

	High / Ultrahigh Vacuum Type:
	Your choices are...
	Turbomolecular		Turbomolecular pumps use a series of high-speed rotors (25,000 to 75,000 rpm) and flow stabilizing, stationary stators to impart a preferential motion to gas molecules and create molecular flow through the pump. They are often described as "molecular bats." They are also known as axial flow turbines.
	Molecular Drag		Molecular drag pumps are similar to turbomolecular pumps, except a rotor drum with a ridged surface and cylindrical stator are used in place of stator and rotor blades to impart a preferential motion to gas molecules and create molecular flow through the pump. Hybrid pumps are available that use combinations of blades and ridged drums.
	Diffusion / Vapor		Diffusion pumps use jets of diffusion oil vapor to impart momentum and sweep gas molecules from the system. Diffusion pumps have no moving parts and provide the highest pumping speed for lighter gases like helium and hydrogen. Diffusion pump oil can wander or backstream into the system causing process contamination.
	Ion		Ion pumps utilize a sputtering process to ionize then entrain gas molecules and embed them into the anode or cathode wall. The entrainment process can utilize a getter, such as titanium, to bind and bury the molecules. Ion pumps can operate in the ultra-high vacuum range and eliminate contamination by organic molecules.
	Cryogenic / Cryosorption		Cryogenic pumps utilize extremely cold (liquid N₂ and He temperatures) surfaces, and absorption surfaces freeze or trap molecules. Cryogenic pumps can operate with relatively high force or exhaust pressures. Cryogenic pumps must be periodically generated to purge the frozen or trapped gases. Cryosorption pumps evacuate gas molecules from a volume by adsorbing them on the chilled surface of a molecular sieve. These molecular sieves are designed to have a large surface area-to-volume ratio to maximize the adsorbing area.
	Getter / TSP / NEG Sorption		Getter or titanium sublimation pumps (TSP) entrain gas molecules in a getter, or material that is vaporized in order to absorb or capture the molecules and embed them on the cold outer wall of the chamber. These can also use "non-evaporating gettering sorption" techniques by using a large-surface-area porous matrix for entrainment.
	Other High / Ultrahigh Type		Unlisted, specialized, or proprietary high vacuum pump.
	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.

	Venturi Jet Type:
	Your choices are...
	Venturi Air Jet		In a venturi air jet, the vacuum is "drawn" by entrainment of air by a flow of compressed air used as the motive fluid. This technology is used in a wide range of vacuum applications, from very small sampling uses to large industrial vacuum systems. They are usually used to create vacuum for air or gas systems, and are often unsuitable for liquid vacuum uses.
	Steam Ejector		Steam ejectors use steam as the primary motive fluid. These are very reliable systems that are used widely in industrial vacuum systems.
	Liquid Eductor / Ejector		Liquid eductors use liquids, such as oil or water, as the motive fluid to provide vacuum. These are typically used for creating vacuum in liquid systems.
	Other Venturi Jet Type		Unlisted or specialized Venturi type vacuum generator.
	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.

	Integral Backing Pump?		Integral backing pumps are high vacuum systems that includes a mechanical, sorption, or other backing pump to provide preliminary vacuum level for the high vacuum stage of the pump.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Other Type Of Vacuum Pump
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	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.

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.

More Specs


	Lubrication Style:
	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.

	Mounting
	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.
	Floor / Skid		The device rests on floor or on a skid; they are typically used for larger vacuum pumps.
	Permanent Installation		Permanent installation is used with very large systems or stations that are installed permanently in one place.
	Other		Other unlisted, specialized, or proprietary mounting style.
	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.

	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.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Valve Sequencing Control?		Sequence control of valve opening is critical, especially in a high vacuum system. This option denotes pumps with valve control.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Vacuum Gauge?		Vacuum gauges have a dial, numeric, or other readout of pressure.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	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.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Gas Ballast?		Atmospheric air is allowed into the compression chamber to minimize condensate in the oil and prevent corrosion.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	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.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

Vacuum Pumps and Vacuum Generators Specifications

Ultimate Operating Vacuum:

Pumping Speed:

Configuration:

Mechanical Pump Type:

High / Ultrahigh Vacuum Type:

Venturi Jet Type:

Integral Backing Pump?

Other Type Of Vacuum Pump?

Compression / Pressure Service?

Applications:

Lubrication Style:

Mounting:

OEM Controller / Control Panel?

Valve Sequencing Control?

Vacuum Gauge?

Integral Trap(s)?

Gas Ballast?

Magnetic Bearing?

Help with Vacuum Pumps and Vacuum Generators specifications: