Nantong Zhongtian Machinery Manufacturing Co., Ltd.

ZJ,ZJB Roots vacuum pump is a rotary variable displacement vacuum pump,also known as

mechanical booster pump. It is currently one of the main pumping equipments for obtaining

medium and high vacuum. Its working principle is similar to roots blower, which is used Two

＂8"-shaped rotors rotate synchronously in the pump casing to complete suction and exhaust.

The difference between ZJB type with relief valve Roots vacuum pump and ZJ Roots vacuum

pump is that the inlet and outlet is connected. The self-weight valve was loaded vertically in

the channel. Its role is to make that the pressure difference between the exhaust port and the

air inlet is always maintained within a controllable value which is the maximum pressure

differential allowed for the pump to operate reliably. Therefore, this kind of valve is actually an

overload automatic protection valve.