Single-stage oil treatment plants are not equipped with an oil feed pump. Their oil drain pump is a gear pump and the gas extraction system is a rotary-vane vacuum pump. The tank body of the oil treatment plant has high vacuum. In general, oil is sucked into the degassing tank of the oil treatment plant from a vessel with normal pressure.
Oil filtration indexes:
- After one treatment, the moisture content is ≤ 10±2 ppm; the gas content, ≤ 0.5 %
- After three treatments, the moisture content is ≤ 5±2 ppm; the gas content, ≤ 0.2 %