Dry Vacuum Pumps for Chemical Processes (120 m3/hr to 2100 m3/hr) The dry vacuum pump is multi-stage Roots type. It is constructed as a three-stage horizontal type with intermediate heat exchanger. The vacuum pump can be operated in a completely dry condition at any suction pressure from ultimate pressure up to atmospheric pressure. The intermediate heat exchanger ensures easy solvent recovery. All the pump components are mounted together on a common frame. The pump capacity is 120 m3/hr to 2100 m3/hr. Through the use of high vacuum mechanical boosters, with the dry vacuum pump, the pumping capacity can be extended as required. TRM is the best dry vacuum pump for Solvent recovery. 100% solvent recovery is possible by using TRM.