Vacuum Pumps
JP Selecta vacuum pumps: oil-free diaphragm with PTFE membranes. Ultimate vacuum 2 mbar. For rotary evaporators and filtration.
Product families (3)
Frequently asked questions
What warranty do JP Selecta vacuum pumps equipment offer?
All JP Selecta vacuum pumps equipment includes a 2-year warranty, official [technical service](/servicios) in Spain, and an international network of [certified distributors](/distribuidores). We have original spare parts and continuous technical support.
Do you offer calibration service for vacuum pumps equipment?
Yes, JP Selecta offers [certified calibration service](/servicios) with international traceability (ISO 17025) for all vacuum pumps equipment. The service can be performed on-site or at our facilities.
How to request a quote for vacuum pumps equipment?
You can [request a quote](/contacta-experto) through our website contact form, by email (selecta@jpselecta.es), or by contacting our sales team directly at +34 93 770 08 77. We offer personalized advice.
What is the difference between a water recirculation pump and a PTFE diaphragm pump, and when should I use each?
Water recirculation pumps generate vacuum via the Venturi effect (between 5 and 40 mbar), are eco-friendly because the water is reused and handle condensable vapours well, making them ideal for filtration or gentle concentration. Rotary vane pumps use sealing oil to reach deep vacuum levels (down to 0.006 mbar), so they are essential for freeze-drying, extreme drying or degassing.
What vacuum level do I need for my application (rotary evaporation, filtration, vacuum drying)?
For routine processes such as vacuum filtration or desiccators, moderate vacuum (10 to 40 mbar, typical of water recirculation pumps) is usually enough. However, for sublimation, freeze-drying or evaporation at very low temperatures, a laboratory rotary vane vacuum pump capable of dropping below 0.1 mbar is required.
Which type of pump tubing should I choose for my peristaltic pump based on the fluid being transferred?
Our equipment is adapted for standard silicone tubing (available in several thicknesses). Silicone offers excellent mechanical malleability and high purity for dosing in biological and non-corrosive chemical laboratories. For strong organic solvents, the specific chemical resistance table for silicone should be consulted.
Can the water recirculation pump be used with organic solvents or acids, or does it contaminate the reservoir water?
Yes, aspirated vapours unavoidably mix with the 10 litres of water in the tank. Although the interior is built in stainless steel and resistant polypropylene, the "Scrubber" extraction and neutralisation unit should be attached to protect the pump from strong acids. We also recommend periodically replacing the water through the built-in drain valve to avoid chemical-contaminant build-up.