The current situation of the development of zhejiang valve test bench

Current situation of the development of zhejiang valve test-bed www.dsyyjx.com/ valve test bench Valve test-bed is a enormous quantity wide range of products, production is very big, the output value is not high, but it is really a directly affect the vacuum equipment performance quality indispensable based products. Valve test-bed according to the needs of users and the market dynamics. Market growth of the main driving force comes from the rapid development of semiconductor industry and dry pump and hydraulic valve testing equipment used in the field of widening. Valve test-bed, the world's market with annual sales of about $2 billion, annual growth rate at about 7%. Manufacturer of valve test bench in China a lot, all valve test-bed with annual sales of around 150 million yuan, equivalent to a valve test-bed Kinney company annual sales in the United States. Through the analysis of valve test bench markets around the world we can see that all kinds of valve test-bed of market and application fields are constantly changing and developing. Valve test rig in our country manufacturing industry has a long history and strong foundation, domestic valve test bench has been applied in many different fields and proven, some pumps also exports abroad, recognised by users abroad and well received, it should be said valve test-bed manufacturing at home and abroad market in China still has a huge space for development. 1. The device under test Although belongs to coarse valve test bench test equipment, but in our country's petroleum, chemical, electric power, textile, papermaking, medicine and other fields still has very big market. Abroad, water ring pump sales account for 14% of all valve test rig market, second only to dry pumps, so Nash, Seimems and Kinney companies invest in China or to establish a sales network, expanding market share in China. Because water ring pumps are mostly casting, processing requirements is not high also, belongs to the labor-intensive products, so the domestic water ring pump on price competitive advantage, the key is to improve design, reduced volume, lose weight, improve efficiency, reduce energy consumption. 2. Hydraulic press Hydraulic press is a kind of oil seal type valve test-bed. Because hydraulic press is durable, reliable, domestic and international various kinds of vacuum furnace, coating machine and drying, impregnation equipment is done with hydraulic press as the backing pump, but hydraulic press casting, processing workload is bigger, so each vacuum factory abroad looking for partners in China. In order to make the domestic hydraulic press to enter the international market, we must further reduce pump vibration noise, to eliminate fuel injection and oil spills, improve the reliability of the hydraulic press for long-term operation. 3. The valve pressure test equipment With the expansion of the vacuum technology in various applications, the valve pressure test equipment demand more and more big. Because of this pump number, processing and assembling workload is very big, the price is very low, so some foreign vacuum manufacturers set up plants in China. Domestic small and medium-sized valve pressure test equipment has been technically, the price is far cheaper than foreign pump, so domestic pump has a competitive advantage, the key is to solve the shaft seal leakage and rotary vane materials and the performance of the valve test-bed oil quality problems, ensure that straight league pump in high speed, high temperature performance is stable and reliable operation, and further improve the domestic valve pressure test equipment in addition to the ability of water vapor. 4. Hydraulic valve testing machine Hydraulic valve testing machine production from abroad, several large companies abroad, such as Leybold, Balzers, Alcatell, Edwards and ULVAC, their roots pump sales account for the proportion of global roots pump sales are not more than 5%, the five totaled 20%, roots pump production is not big, but foreign roots pump price is much higher than domestic pump. At present, almost all large or small, high vacuum and vacuum system, in order to shorten the extraction time, increase the production efficiency are equipped with roots pump, so domestic roots pump must be based on the occupation of the domestic market to enter the international market, thus to further reduce the domestic roots pump vibration noise, completely solve the problem of shaft seal leakage, improve the appearance quality of the pump, improve the roughness and cleanliness within the pump. Also consider to some countries and regions, the power frequency is 60 hz, the more sure Paul, in the case of raising speed pump long-running reliability. At present, the domestic air-cooled in-line atmospheric roots pump progress quickly, technology is ripe. Because of this pump at the bottom of the vent is equipped with gas cooler, some of the cooled gas through the pipeline to return to the pump chamber to cool the rotor, so that the compression heat balance, so this kind of pump can be in-line atmosphere. In order to meet the requirements of different ultimate vacuum, this pump can be used in series, usually add an air-cooled straight in front of the row of atmospheric roots pump, have reached the limit of high vacuum pump before than an order of magnitude. This kind of pump due to out of work in the pump cavity medium, is actually belong to dry the pump. At present, this kind of air-cooled in-line atmospheric roots pump and crew have in petroleum, chemical, plastics, pesticides, steam turbine rotor dynamic balancing, aerospace space simulation device got long running test, so should be promoted and applied in China. 5. Hydraulic valve testing equipment Hydraulic valve testing equipment in the field of foreign semiconductor many occasions is used instead of centrifugal pump, especially the devices such as sputtering, etching and LCVD USES the compound hydraulic valve testing equipment and traction as the main pump. Due to the pumping speed of hydraulic valve testing equipment for water vapor was only about a quarter with diameter of low-temperature pump pumping speed, so the hydraulic valve testing equipment of the evacuation time is longer than cryogenic pumps. Abroad in order to improve the pumping speed, on the inlet side of the hydraulic valve testing equipment with a - 130 ℃ ~ 150 ℃ low temperature cold plate, called a hydraulic valve testing equipment at low temperature, water vapor is captured by the cold plate, other gases by hydraulic valve testing equipment. This low temperature hydraulic valve testing equipment in the vacuum coating device application, improved the production efficiency and improve the coating quality. With China's semiconductor industry, film industry and the rapid development of scientific research career