| 摘要 |
A set of suction and delivery check valves for volumetric membrane pump comprising a body with separate channels connecting the operating section of the membrane chamber with the first body recess, where a set of suction valves and an inlet pipe are located, with the second body recess, where a set of delivery valves and an outlet pipe are located, whereas each set comprises at least two valves located in series and interconnected, characterised in that the moving element of each valve forms a head (12, 17, 20, 25) shaped as three quarters of a spherical surface ended with a cylindrical pivot (13) located shiftably axis-wise inside one of the sleeves (11, 15, 21, 26).<IMAGE>
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