Roots slide valve pump vacuum unit model

NegotiableUpdate on 02/10

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

The Roots slide valve pump vacuum unit is a vacuum acquisition device for the front stage pump, with a compact structure and easy operation. In addition to the main pump and the front stage pump, the unit also includes connecting bends, stainless steel corrugated pipes, electromagnetic inflation valves, electric contact pressure gauges, and electrical control boxes. Generally, Roots pumps and slide valve pumps are installed on the same frame. Please refer to the external dimensions diagram of the unit for details.

Product Details

Roots slide valve pump vacuum unit modelProduct Introduction

The Roots slide valve vacuum unit is a regular ZJ or ZJP type Roots vacuum pump with a bypass valve. As the ZJ or ZJP type Roots vacuum pump can only be started after the system is pumped to the allowable starting pressure of the Roots vacuum pump by the preceding stage slide valve vacuum pump. Therefore, it is generally necessary to install an electric contact vacuum gauge at the inlet of the unit to control the starting pressure and working pressure range of the Roots vacuum pump. After the current H-150D slide valve vacuum pump is started, pre pumping of the system begins. When the system pressure, i.e. the inlet pressure of the Roots vacuum pump, reaches the pre-set value indicated by the green needle of the electric contact pressure gauge (i.e. the allowable starting pressure value of the Roots pump), the Roots vacuum pump can start working. If the inlet pressure of the Roots vacuum pump is higher than the value indicated by the green needle on the electric contact pressure gauge due to special circumstances when all pumps in the unit are in normal working condition, the Roots vacuum pump will automatically stop, which can achieve automatic overload protection of the Roots vacuum pump and avoid pump failure caused by overload and heat generation.

feature
(1) Has a larger pumping speed within a wider pressure range;
(2) The rotor has good geometric symmetry, resulting in low vibration and smooth operation. There are gaps between the rotors and between the rotor and the housing, which do not require lubrication and have low friction loss. This can greatly reduce the driving power and achieve higher speeds;
(3) The pump chamber does not require oil sealing and lubrication, which can reduce the pollution of oil vapor to the vacuum system;
(4) There is no compression in the pump chamber and no exhaust valve. Simple and compact structure, insensitive to dust and water vapor in the extracted gas;
(5) Low compression ratio results in poor hydrogen extraction efficiency;
(6) The surface of the rotor is a complex curved cylindrical surface, which is difficult to process and inspect.

Roots slide valve pump vacuum unit modelCommon models and parameters

model	Extraction speed L/s	Ultimate pressure pa	Equipped with power kw	Water consumption L/h
JZJH-600.150	600	0.1	16.5	500
JZJH-1200.150	1500	0.1	22	600
JZJH-1200.600.150	1500	0.05	27.5	800

Note: 1. The ultimate pressure of the unit refers to the air partial pressure value measured by a Maxwell vacuum gauge, and the total pressure value measured by a thermocouple vacuum gauge should be half to one order of magnitude lower than the ultimate pressure.

2. The maximum pumping rate of the unit refers to the inlet pressure of the main pump of the unit being between about 1 and 100? The actual pumping speed measured under PA working conditions.