| 摘要 |
FIELD: oil industry. SUBSTANCE: device has cylinder, plunger with branch pipe communicating with outer surface of plunger. Rod is coupled with plunger by means of piston pump through its cylinder, piston and rod. Suction space of piston pump has filter-moisture separator, and delivery space is connected with branch pipe. EFFECT: increased service life of pump owing to improved lubrication of plunger pair. 2 dwg
|
