FIELD: engines and pumps.
SUBSTANCE: proposed pump incorporates stator (10) with tubular rigid case and elastic bowl (12) with thickness invariable along stator length. Said bowl has two or more turns of screw surface and at least on one its end, a tapered sealing surface (26) located at least partially inside stator case and aligned with sealing surface (28) of connecting flange (14) or coupling part. Tapered sealing surface (26) has at least one ledge (30) and/or recess to be jointed to connecting flange (14) or coupling part.
EFFECT: perfected seal between stators jointed together, and connecting flanges or coupling parts.
10 cl, 3 dwg
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