To provide a pump device that may reliably and cost-effectively deliver viscous medium having a high solid component at high pressures of ≥200 bar and high temperatures of ≥300°C.
In a pump device provided with a first diaphragm pump head which has two or an integral multiple of two fluid conveyance spaces and diaphragms belonging to the fluid conveyance spaces and which is hydraulically coupled to a second pump head for driving the first diaphragm pump head, the second pump head has two additional fluid conveyance spaces and additional associated diaphragms, which are drivable by a double-acting piston via associated diaphragm control spaces. A refilling valve is connected to each of the diaphragm control spaces and a diaphragm control pressure greater than atmospheric pressure is temporarily applied to the diaphragm control spaces, when using the refilling valve.
GODE GUNNAR
LADIGES HENNING
PETERSEN DIRK
SCHADE UWE
TILLE WILFRIED
| JPS5451004A | 1979-04-21 | |||
| JPS5560676A | 1980-05-07 | |||
| JPH05164053A | 1993-06-29 | |||
| JPH09502245A | 1997-03-04 | |||
| JPH05321841A | 1993-12-07 | |||
| JPS5451004A | 1979-04-21 |
Masatake Shiga
Takashi Watanabe
Shinya Mitsuhiro