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.
Tubing, 10' L, 1.5 ID x 2" OD, Clear, Tygon, 0.25" Wall Thickness, 6" Minimum Blend Radius, 65 and 50 psi Maximum Working Pressure, 25 and 5 psi Vacuum Rating, 2275 I.B. Series, Plasticizer free, Non-toxic, Low Sorption
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Biocompatible Tubing, 25' L, 0.020 ID x 0.145" OD, Silicone, 0.0625" Thickness, 0.125" Minimum Blend Radius, 115 psi at 73°F & 72 psi at 180°F Maximum Working Pressure, For Peristatic Pumps and Cell Culture
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