Selection Guides
How to pick the right pump for each technology — written for buyers, not copied from catalogues. Every guide ends at the models we actually carry.
Vacuum pump fluid is a working part, not a consumable afterthought. It seals clearances, lubricates vanes and bearings, carries heat out and sets the …
Read →How to choose a rotary vane vacuum pumpOil-sealed rotary vane pumps are the workhorse of rough and medium vacuum. A rotor turns eccentrically inside a cylinder; spring- or centrifugally-loa…
Read →How to choose a dry scroll vacuum pumpA scroll pump uses one fixed and one orbiting spiral; the crescent-shaped pockets between them shrink as they travel inward, compressing gas to the ex…
Read →How to choose a turbomolecular pumpA turbomolecular pump is a stack of angled rotor and stator blades spinning tens of thousands of revolutions per minute. Above the rotor tip speed the…
Read →How to choose a helium leak detectorA helium mass-spectrometer leak detector pumps the part under test, then tunes a small magnetic-sector analyser to mass 4. Helium is used because it i…
Read →Choosing the right vacuum gaugeNo single gauge covers the whole vacuum range, so the question is always which sensor for which decade. Capacitance manometers measure pressure direct…
Read →How to choose a liquid ring vacuum pumpA liquid ring pump spins an impeller off-centre inside a casing partly filled with service liquid — usually water. Centrifugal force throws the liquid…
Read →How to choose a Roots vacuum boosterA Roots pump (mechanical booster) has two figure-of-eight lobes rotating in opposite directions with tight clearances and no contact. It cannot exhaus…
Read →How to choose a dry screw vacuum pumpTwo intermeshing screw rotors turn without touching each other or the housing, carrying gas axially from inlet to exhaust. Nothing lubricates the pump…
Read →How to choose a sputter ion pumpA sputter ion pump has no moving parts. A strong magnetic field traps electrons in Penning cells; they ionise residual gas, the ions slam into a titan…
Read →How to choose a claw vacuum pumpClaw pumps use two claw-shaped rotors turning in opposite directions without touching each other or the housing. Gas is drawn in, compressed as the cl…
Read →How to choose a diaphragm vacuum pumpA diaphragm pump flexes an elastomer or PTFE membrane over a head with two check valves. Nothing rubs and nothing is lubricated, so the gas path can b…
Read →Specifying a vacuum pumping unitA pumping unit is a matched set — pump, booster, valves, gauges, control and frame — commissioned as one machine rather than assembled on site. The va…
Read →How to choose a diffusion pumpA diffusion pump boils a low-vapour-pressure fluid, sends the vapour up a chimney and out through angled nozzles as a supersonic jet aimed downwards. …
Read →How to choose a cryogenic vacuum pumpA cryopump freezes gas onto cold surfaces. A closed-cycle helium refrigerator holds a first stage near 80 K, which condenses water and hydrocarbons on…
Read →Vacuum pump repair and service kitsA service kit bundles the parts a given pump consumes on a scheduled overhaul — vanes, tip seals, O-rings and gaskets, shaft seals, filters, bearings …
Read →Vacuum seals, O-rings and tip sealsSealing is where most vacuum systems actually fail. Elastomer O-rings on KF and ISO joints are quick to make and remake and are good to about 10⁻⁸ mba…
Read →Vacuum pump parts and componentsBeyond the seal kit sits everything else a vacuum system consumes: inlet filters and separators that keep dust out of the pumping chamber, exhaust mis…
Read →KF, ISO and CF vacuum fittingsVacuum hardware follows three flange families. KF (also called NW or QF) uses a centring ring and an elastomer O-ring held by a hinged clamp — fast, r…
Read →