FIELD: engines and pumps.
SUBSTANCE: gasket made an antifriction material is arranged on the surface of the pump guide disc facing the heads of the pistons and repeating the profile of the disc with a groove. Such insert can be made of fluoroplastic composition of F4K20 under dry friction conditions within a wide temperature range from -250 to +260°C. In addition, there are flats are made on the piston head near projections contacting with seals of the guide discs.
EFFECT: increased pump efficiency and expanded list of pumped liquids.
4 cl, 3 dwg
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RU2646519C1 |
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| PISTON PUMP | 2017 |
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RU2279561C1 |
