JZJY type Roots liquid ring pump vacuum unit

JZJY type Roots liquid ring pump vacuum unitProduct Introduction
thisRoots pump liquid ring pump vacuum unitThe connection form and working range of Roots vacuum pumps and liquid ring vacuum pumps at various levels are listed in this table. We have listed the vacuum range that can be achieved by a multi-stage vacuum unit composed of one liquid ring vacuum pump and one to three Roots vacuum pumps connected in series. The vacuum degree of a typical liquid ring vacuum pump is around 3000pa. The ultimate pressure of a JZJY two-stage unit composed of a Roots vacuum pump and a liquid ring vacuum pump in series is only about 150-650pa. If two Roots vacuum pumps are connected in series with a two-stage liquid ring vacuum pump, the ultimate pressure of the unit can reach 5-25pa. If an additional Roots vacuum pump is added, the ultimate pressure of the unit can be even higher, reaching 0.1-0.2pa or more. Therefore, users can choose the correct level of the unit according to different usage requirements. If users have special requirements, they can also directly contact our company for selection by our relevant technical personnel.

Working principle and structural characteristics

The JZJY type Roots vacuum pump liquid ring pump unit is composed of one or several Roots vacuum pumps connected in series with a two-stage liquid ring vacuum pump. The specific structure is shown in the figure below. The liquid ring pump is called the front stage pump, the Roots vacuum pump directly connected to the pumped system is called the main pump, and the Roots vacuum pump connected to the front stage pump and the main pump is called the intermediate pump (JZJY type two-stage unit does not have an intermediate pump).

The pumping speed ratio between each level of vacuum pump (the pumping speed ratio between the rear stage pump and the front stage pump) should meet a certain proportion. If the pumping capacity of the front stage liquid ring vacuum pump is insufficient, it will cause the Roots vacuum pump to have poor exhaust and overheating and overload situations. The pumping speed ratio between Roots pump and liquid ring pump should not be greater than 2, and the pumping speed ratio in low vacuum process conditions should be less than 1:2. Due to the close relationship between the pumping speed and water temperature of the liquid ring vacuum pump, special attention should be paid to the pumping speed ratio of the vacuum pump for users in southern regions and those without chilled water.

Roots pump liquid ring pump vacuum unitProduct Application

Due to the fact that Roots vacuum pumps cannot be used alone, a front-end vacuum pump that meets the requirements for Roots vacuum pump use must be configured to form a complete unit type. JZJY typeRoots liquid ring pump vacuum unitDue to the use of a liquid ring vacuum pump as the front-end pump, it is particularly suitable for suctioning gases with high humidity and industrial processes containing a large amount of water vapor and gases with certain corrosiveness and condensability. And because the liquid ring vacuum pump is suitable for long-term operation in the vacuum pressure range of atmospheric to several thousand pascals, the Roots liquid ring vacuum unit can be suitable for: vacuum distillation, vacuum evaporation, dehydration crystallization, and polymerization reactions of chemical products; The three major processes of polyester chip drying in the textile industry, drying of leather products, freeze-drying in the food industry, and vacuum impregnation and drying in the power industry.

This machine is a rotary variable volume vacuum pump that requires a front-end pump to be used in a wide pressure range, with a high pumping speed and insensitivity to dust and water vapor in the extracted gas. Widely used in industries such as metallurgy, chemical, food, and electronic coating. Mainly used as the main pump for vacuum units, it requires the assistance of a front-end pump. For example: water ring vacuum pump, slide valve vacuum pump, vertical oil-free vacuum pump, molecular vacuum pump, etc. The domestic Roots vacuum pump maintains a record of 20000L/S.