For most chemical applications that operate in the rough vacuum range (down to 1 mbar), diaphragm pumps are a top pick.
Why? Because they're oil-free, eco-friendly, and they don't produce waste water or waste oil.
For applications demanding an even lower pressure in the fine vacuum range (down to o 10^-3 mbar), like freeze drying or Schlenk lines, you need rotary vane pumps .
Rotary vane delivers an ultimate vacuum of 2 x 10^-3 mbar. However, they do require oil for lubrication and sealing, which can sometimes interfere with sensitive processes. Plus, regular oil changes are a must.
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Tubing, 50' L, 0.0625 ID x 0.1875" OD, Clear, Tygon, 0.0625" Thickness, 0.5" Minimum Blend Radius, 35 psi Maximum Working Pressure, XL-60 Series, Chemical Resistance, Flexible, Low Extractable
Vacuum Pump, 18 L x 9 W x 15 cm H, PTFE-coated Diaphragm, PPS Head, FFPM Valve, with Vacuum Gauge, 115 V, 60 Hz, 5.5 L/min Flow Rate, 120 Torr Vacuum, 36 psig Operating Pressure, Chemically Resistant, Maintenance Free, Oil-free
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Worried about corrosion? Then you need the Chemistry-HYBRID pump , which combines a rotary vane pump and a chemically-resistant diaphragm. This ensures the oil chamber is constantly cleared of corrosive vapors and condensates during operation.
But, if you're handling extremely aggressive or corrosive gases and vapors, the PTFE-coated diaphragm pump is your best friend. This oil-free, chemically resistant vacuum pump is perfect for a wide range of lab applications, featuring PTFE heads, PTFE-coated diaphragms, and FFPM valves.
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