Summarize:

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.

Use:

ZJ and ZJB type Roots vacuum pumps are widely used in vacuum degassing, vacuum smelting,

vacuum surface treatment, low density wind tunnel tests, the manufacture of electrical equipment, and vacuum freeze-drying equipment for metal and non-metal materials industries.After the water ring vacuum pumps, the liquid ring vacuum pumps and ZJ and ZJB type Roots vacuum pumps arranged in series, it is more suitable for vacuum polymerization,reaction,decomposition in the chemical industry; vacuum distillation, vacuum drying, vacuum crystallization and other uses in the food industry.

Features:

1.Can have a large pumping speed in a wide range of pressure (1~1.3 x 102Pa).

2.The pump chamber is oil-free,avoiding the oil vapour pollute the vacuum system.

3. Small vibration, low noise.

4. The mechanical friction loss is small, so the driving power is small.

5. Easy to maintain and repair, low cost and long working life.

6.Suitable for sudden deflation of vacuum system.

7. Can remove condensable gases.

8.Can not be used alone, you must configure the fore-stage pump. It is not allowed to start under

atmospheric pressure. It can only start when the fore-stage pump pumps the inlet pressure of the

Roots pump to the allowable starting pressure. Fore-stage pumps are generally oil-sealed mechanical pumps and liquid ring vacuum pumps such as water ring pumps and oil ring pumps.

9.The use of unique processing technology,good interchangeability of parts.

10. It can do electroless nickel plating, infiltrating Hastelloy, spray polytetrafluoroethylene (PTFE),

Ethylene chlorotrifluoroethy