Control valve consists of two major assemblies components: body assembly and actuator assembly (or actuator systems), is divided into four series: single-seat series control valves, control valves seater series, sets cylinder series control valves and self-series control valve.
2015年2月6日星期五
Gas heater valve lifting requirements
Should be used at high intensity, long enough rope fixed to the lifting screw, ensure the rope angle of less than 60 °, lifting; Gas Heater Valve in the lifting, tying the sling is not allowed in the gas heater valve end cap on the gas heater valve neck, or gearing To move smoothly to avoid shocks.
Distance from the center of the pump outlet gas heater valve should be greater than 2000mm, if you can not meet this condition, to take rectification measures, where possible, the conditions should try to increase this distance in order to reduce the adverse effects of the turbulent flow regime pump outlet of the gas heater valve.
Some still some speakers pump outlet pipe, gas heater valve fully open, the disc should be within flare.
The butterfly patio heater valve body is mainly composed, transmission, hydraulic and electrical control components. Has the following main features:
The gas heater valve main seal type is: Stainless steel - stainless steel, and with three eccentric structure, so reliable sealing performance, and the disc more closed more tightly, easy to disengage; ring made of stainless steel, corrosion resistance and long service life.
For lead-bearing non-oil self-lubricating bearings, with strong bearing capacity, wear resistance, friction resistance and other characteristics; shaft seal with self-tightening and other double-sealed, good sealing effect; disc shape with streamlined design, has a small Gas Control Valves coefficient of flow resistance (≤0.2), novel appearance, appearance and other characteristics.
In short, the accumulator tank hydraulic control slow closing check gas heater valve in the application of the pumping station, with easy operation, investment, quick, favorable energy efficiency and many other advantages, in a similar pump station application.
2014年12月7日星期日
Metal valve industry has opened a unique line of innovations
Under the continued good macroeconomic situation, most of the production and sales targets are metal valve industry maintained a rapid growth, but due to the impact of a price war, industry sales revenue and profit fell sharply from last year. Overall, the concentration of the lower valve market industry to produce low-end products. In terms of the core technology has, there is still a certain gap between domestic enterprises and the world's developed countries.
Low value-added Currently, China's valve industry, there are still some problems, such as valve company in China mainly low-level, small-scale, family-owned enterprises. On the product, due to duplication of investment, technology transfer is not enough, our valve leading enterprise products is still low quality mass products.
Resulting in poor product quality reasons domestic gas patio heater valve industry in China's valve industry structure, industrial valves, industrial chain, and the degree of specialization and trade on a large gap with foreign enterprises that are present: the rapid expansion of the market, the original state-owned enterprises have valves Guantingbingzhuan. Although the rapid development of township enterprises, but due to the low starting point, technology is weak, poorly equipped, imitation products are mostly produced.
It is understood that China's production of various valves widespread leakage, internal leakage, the appearance is not high quality, short life, the operation is not flexible and valve actuators and pneumatic devices are not reliable shortcomings, some of the products is equivalent to the last century international level of the early 1980s, some of the key devices require high temperature and pressure and a valve is still dependent on imports.
Low total import and export profits valve industry in China reached $ 24.1 billion last year, an increase of 28.2% of which exports amounted to $ 22.4 billion, an increase of 29.3%; The total imports of $ 20.134 billion, an increase of 27 percent as the world economy. pick up, import and export of our Gas Control Valves products also increased, but because of the high-end technology and foreign manufacturers are still large gaps compared to the period ahead, product technology will become a bottleneck restricting the development of our valve products.
Currently, Chinese valve manufacturer is also limited to a few small profit target market, such as Ethiopia, Sudan, Iran, Iraq and parts of Southeast Asia. The market is small, the decision-making process all depends on the price and limited profit margins.
China imported valve manufacturers must pay attention to such an undeniable fact: If you want to survive in the future, they must improve the performance of the previous recession, access to large export manufacturing profit. Currently much of export earnings is largely due to a large number of business opportunities in the Chinese domestic market, but also the quality of Chinese imports valve manufacturing equipment is not enough to sell overseas.
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