| 摘要 |
An improved high-pressure pump ( 1 ) for an accurate, largely pulsation-free flow of the working medium, more particularly an HPLC pump, includes one or a plurality of the following measures: reduced dead space due to adapted seals ( 48, 70 ); reduced dead space thanks to a device ( 15, 16; 32; 36, 38 ) for adjusting the length of the displacement piston; adjustable dead space and therefore adjusting capability of the pulsation freedom through a displacement chamber provided with an adjustable opposed piston ( 58 ); and seals compensating construction tolerances by a combination of a cambered sealing surface and a conical sealing surface.
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