Accident case: In January 2014, Jiaozuo Haochun, a manufacturer of frozen products, purchased refrigeration equipment from a refrigeration company in Zhengzhou through a Jiaozuo refrigeration equipment installation company. He did not expect that the cold storage would not be operational until January 23 and found that cold storage was not refrigerated on 3th of February. The inspection by the Song master found that high pressure refrigeration equipment there is the problem of welding quality, the frozen of loss USD6250 products have smell.
Accident analysis: The biggest difference between inferior valve In the choice of materials, in general, inferior valve materials used in the composition is not correct, high impurity content (a lot of scrap melting furnace), the strength and sealing of the valve is very important.The poor valve often be producted by informal manufacturers of seals, lower material wall thickness to reduce their costs for making a profit.The current market price of some products even lower than the cost itself, which is very illustrative. On the other hand, we have to admire inferior imitation ability of the valve, the appearance of even better than the authentic appearance. And some of the true and false are difficult to be distinguished .Poor quality valves on the refrigeration system is a big danger:
(1) The strength can not meet the design life requirements, usually 1 to 2 years on the damage;
(2) valve seal leaks, resulting in a large number of refrigerant leaks, the system can not operate normally, affecting the compressor life;
(3) pressure loss affect the energy efficiency of the system to play, resulting in energy waste.
Other considerations: In addition, the advantages and disadvantages of the valve in the market price difference is also great, low-cost valve parts, the general is the high-grade valve parts 40% -50%.Of course, we should also have to look specifically what type of valve. Also do not rule out the price of some counterfeit products that even cheaper, or counterfeit products posing as high sales.