Features
1. Stator rubber is prepared on the basis of the chemical features of oil and tested on
    rubber swelling, in order to guarantee adaptability of stator to the working environment.
2. The special intersecting surface of stator can reduce adsorption torque when starting and
    avoid the damage of pump oil bar.
3. Due the special surface of rotor which undergoes special technological process, rotor gets
   more resistant to abrasion.
4. The rotor with access hole of Φ２０mm is used with washing well valve in order to implement thermal wax
removal with low pressure and high delivery capacity, what can increase the service life of pump.