First, an overview 
 Rich into a low-pressure pneumatic conveying equipment, material sealed pump products, the introduction of foreign advanced technology on the basis of the domestic industry, different types of pneumatic conveying equipment exist various problems to develop a new type of low-pressure pneumatic pump equipment. 
 The material sealed pumps are widely used in thermal power plants, thermal power plant pneumatic ash handling system, water conservancy and hydropower construction sites and city commercial concrete mixing plant, mixing the powder in the station in material handling, cement homogenization and down the library, a variety of powdered materials the delivery, as well as the industries of metallurgy, chemicals, building materials, docks and other powdery material handling, transshipment process. Into a series of rich low-pressure pneumatic conveying equipment, material sealed pump has been successfully used in many powder project is one of the best powdered materials in pneumatic conveying equipment. 
 Two works and structural characteristics 
 The low-pressure pneumatic conveying equipment, material sealed pump gas beat the difference principle with the jet stream technology, the combination of fluidization technology, to fully absorb the theory of modern pneumatic conveying, after years of running the practice summary for the powder pneumatic conveying process system, a large number of requirements continuous transport and the development of special equipment. The equipment compared with other pneumatic conveying equipment, such as a warehouse-style pump with the following characteristics: 
 A simple structure, reliable operation 
 The low pressure pneumatic conveying equipment, material sealed pump materials by atmospheric pressure into the material sealed pump, the use of the unique design of the injection device, the material fed into the pipeline, the gas beat errand materials sent to the destination of the subject material along the pipeline. The overall structure is simple, very reliable. 
 (2) wear and long service life 
 As a result of continuous transmission, low wind capacity, the internal velocity is low and constant, and therefore less wear and long service life of the entire system equipment. 
 3 convenient and flexible layout 
 The material can be sealed pump in accordance with the specific circumstances of the system, arranged into a single-tube single pump or pump condominium, multi-pump gas source type. The pipe can be horizontal, vertical, oblique arrangement, to meet the project ever-changing layout requirements. 
 Sealed, non-polluting transportation, to meet their own environmental and engineering quality of the input material requirements 
 As the material sealed pump with low positive pressure, fully sealed transmission, outside material into the tube, and thus does not cause any change in the nature of the required materials. 
 (5) conveying stability 
 As a result of continuous conveyor using low pressure, high winds, there is no plugging phenomenon. 
 6. Simple operation 
 Only limited parts of the operation of the equipment, supporting parts only Roots blower, the body control to just "start" and "stop" operation, without human duty, just patrol. Continuous pump process is simple system, the configuration control system logical relationship is simple, operation is simple and reliable peacekeeping contingent. 
 7 the quality of the gas source not ask 
 As a result of the continuous form of transport, combined transport power air source generally use the Roots blower power air source generally do not need to set up a purification system, only the volume and pressure have certain requirements, you can use the independent gas source or project air compressor station gas source (central air). 
 High system reliability 
 The low-pressure pneumatic conveying equipment, material sealed pump low pressure pneumatic continuous conveyor system, and can not be achieved any other delivery system consisting of pneumatic conveying equipment reliability. This is due to: 
 Low pressure continuous conveying systems generally use the Roots blower (also high-pressure centrifugal blower or compressor), the high reliability of the Roots blower determines the reliability of the system. 
 Device ontology is simple, non-conventional pneumatic conveying the frequent movement of the valve in the process, equipment failure rate is greatly reduced. 
 Composed of pneumatic conveying systems by low-pressure pneumatic conveying equipment, material sealed pump, less the number and type of general equipment, making the whole system is simple and reliable. 
 Continuous delivery pressure is stable, without any impact load. 
 Economy is reasonable, low cost and low running costs of the system. 
 By low-pressure pneumatic conveying equipment, material sealed pump low pressure continuous pneumatic conveying system with the above characteristics, and thus low cost, and superior operation indicators. 
 Therefore, the superiority of this system: not only reflected in the projects were implemented its investment, but also in the running process will continue to reflect the lower operation and maintenance costs.