for Chemical Application
The SIHIdry two-stage roots system is based on a dry-running screw pump and a roots pump. The spreader rotates in the opposite direction without touching. The intake is on the upper side and the outlet is in the geodetically lowest possible position (top-down requirement).
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The vacuum system SIHIdry H-version is based upon the dry running twin screw principle. The screw-shaped displacing bodies counter-rotate without contact. The pump inlet is at the top and the outlet at the geodetically lowest position (top-down pumping). In contrast to conventional pumps the both screw spindles are not mechanically but electronically synchronized.
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The vacuum system SIHIdry M-version is based upon the dry running twin screw principle. The screw-shaped displacing bodies counter-rotate without contact. The pump inlet is at the top and the outlet at the geodetically lowest position (top-down pumping). In contrast to conventional pumps the both screw spindles are not mechanically but electronically synchronized.
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