Pinnacle can help you achieve a smaller carbon footprint and lower life cycle costs with an Elmo Rietschle screw vacuum pump. The Elmo Rietschle S-VSI rotary screw vacuum pump is state-of-the-art dry running technology used in multiple industrial applications like drying and packaging. If you require clean, oil free processing the S-VSI size 100 and 300 screw vacuum pumps will fit your needs. The screw vacuum pump high efficiency design eliminates the need for booster pumps in many cases. The Elmo Rietschle S-VSI rotary screw vacuum pumps reach vacuum capacity levels of 29.92 HG and deliver long life with the contact-free, minimum maintenance design.
Elmo Rietschle S-VSA and S-VSB rotary screw vacuum pumps are primarily used in the chemical and pharmaceutical industries for processing applications. The dry running, contact-free screw vacuum pumps are used where mechanical seals are needed to ensure contamination with oil or other operating liquids is impossible. Several screw vacuum pump sizes are available with ATEX certification. Achieve chemical resistance with the internal coatings of the chemical version of the Elmo Rietschle rotary screw vacuum pumps. Various seal options along with gas or liquid purge will eliminate harsh gases without damaging the screw vacuum pump.
Screw vacuum pump performance:
Operate at any pressure between end vacuum and atmospheric pressure with our S-VSA, S-VSB and S-VSI screw vacuum pumps. S-VSA, S-VSB and S-VSI screw vacuum pumps achieve an ultimate vacuum of 29.91 in. HgV and their capacities range from 59 to 1,500 cfm.
Rugged and Durable Design:
Elmo Rietschle S-Series screw vacuum pumps have two timing gear-synchronized parallel screw rotors in the pump housing that turn in opposite directions. Gearbox and mechanical seals in the screw vacuum pump are oil lubricated and gas is compressed in the direction of the discharge port. A continuous flow of coolant in the screw vacuum pump housing provides efficient cooling.
Our S-Series screw vacuum pumps feature high vapor and liquid tolerance, are easy to service and have a long service life – the low rotational speed ensures low noise and low vibration operation.
The Elmo Rietschle rotary screw vacuum pump offers low cost and minimum maintenance for general vacuum applications to handeling harsh chemicals. The German designed and engineered rotary screw vacuum offers solutions for even the most difficult vacuum applications.
In S-Series screw vacuum pumps compression is achieved by internal volume contraction.
A screw vacuum pump consists of two screws, one with a right-hand thread and the other with a left-hand thread. Both screws turn in the compression housing without friction with very tight clearances. They are synchronised via a precision gear.
The compression housing and the special shape of the screws form the compression chambers. Due to the opposite rotation of both screws the chamber connected with the suction port is enlarged and the gas is transported into the compression chamber. Then the chamber moves axially from the suction side to the pressure side (arrow). During this transportation the mass of the gas in the chamber increases.
On the pressure side the chamber is moved against the axial housing wall and the volume is reduced until the front surface of the screw opens the pressure channel and the pre-compressed gas is discharged through the pressure connection. Cooling is achieved using a water cooled outer chamber. For some pump sizes additional cooling gas can be introduced into the pump.
Dry running, contact-free screw vacuum pumps with capacities ranging from 105 to 720 m³/hr (61.8 to 423.5 cfm), end vacuum 0.05 mbar (abs.). Easy to service. Different coatings available to enhance corrosion resistance. Especially suitable for solvent recovery and drying processes. See S-VSA data sheet.
Dry running, contact-free screw vacuum pumps with capacities ranging from 80 to 650 m³/hr (47.1 to 382.4 cfm), end vacuum 0.05 mbar (abs.). Easy to service. Different coatings available to enhance corrosion resistance. Especially suitable for solvent recovery and drying processes. Low running temperature thanks to the progressive graduation of the screw pitch. Several sizes are available with ATEX approval. See S-VSB data sheet.
Dry running, contact-free screw vacuum pumps with capacities of 100 to 360 m³/hr (58.8 to 211.8 cfm), ultimate vacuum 0.1 mbar (abs). Easy to service. Especially suitable for industrial applications like packaging or drying processes. Low running temperature due to the progressive graduation of the screw pitch. See S-VSI data sheet.