2BV Water Ring Vacuum Pump Unit

2BV Water Ring Vacuum Pump Unit

[Simple Introduction]

Vacuum pump units, 2BV water ring vacuum pump units, water ring pump units are widely used in various industries. The water ring pump is used in conjunction with a Roots pump, with the water ring pump serving as the primary pump in series. The water ring vacuum pump unit's choice of water ring pump as the primary pump offers advantages over other vacuum pumps, as it not only overcomes the limitation of pressure difference in a single water ring pump (the unit's maximum pressure is significantly higher than that of the water ring pump), but also, at the same time, retains the Roots pump's ability to operate quickly and its high exhaust rate.

Detailed Description

Principle of Water Ring Vacuum Pump Unit

2BV Water Ring Pump and Roots Vacuum Pump Unit Operating Principle

Rotary vane vacuum pumps (mechanical booster pumps) designed for high vacuum levels must not be directly vented to the atmosphere. Direct venting can cause excessive pressure difference between the intake and exhaust ports of the pump, leading to overload. Increasing the motor power of the pump could result in overheating, causing the slight gaps between the rotors to quickly seize due to thermal contraction. To ensure the pump can achieve high vacuum levels, it is crucial to maintain the gap between the rotors. Therefore, when using a rotary vane vacuum pump, it is essential to have a preliminary pump. Use the preliminary pump to reduce the internal pressure to a certain level before starting the rotary vane vacuum pump, which can prevent overload. Preliminary pumps can be selected from water (liquid) ring vacuum pumps, scroll vacuum pumps, slide valve vacuum pumps, reciprocating vacuum pumps, and other vacuum pumps that can be directly vented to the atmosphere.

The Roots vacuum unit is more advantageous to use a water ring pump as the primary pump under normal conditions compared to other vacuum pumps. This is particularly important because it can remove a large amount of condensable steam, especially when the mechanical vacuum pump with gas-lubricated seals does not have sufficient power to expel condensable steam, or when the solvent used can improve the pump oil while imparting unnecessary properties, or when the vacuum system does not allow for oil purification.

Roots pumps and water ring pump units are broadly used in vacuum systems for chemical, pharmaceutical sublimation drying, low-pressure simulation tests, and more. These combined units come in various types, generally as follows.