Affect stomatal pulley into what? Pores are large pulley casting the most common defects in multiple European standard pulley wholesale manufacturers, because the pores in accordance with the European standard pulley gas formation, porosity divided into three types, namely due to the reasons for the formation of type casting invasive pores; because the liquid metal contained within deposition of a gas component forming pores; the molten metal and the mold due to chemical interaction with each other is formed between the reactive pores. A stomatal invasive invasive pores is mainly due to surface accumulation of gas sand intrusion of molten metal is formed, the gas in the water from the mold material, a binder and various addenda and the like. 2 precipitation of stomatal pores precipitation of aluminum and steel castings are common defects. It is mainly due to the reasons for the formation of the metal itself. Metal can be a lot of dissolved hydrogen, nitrogen and oxygen. Iron oxide in the presence of iron oxide mainly in the form, in the metal solidifies, hydrogen, and nitrogen solubility significantly reduced, hydrogen, and nitrogen is deposited. When the iron to form iron oxide and carbon monoxide reaction, while carbon monoxide is not soluble iron, or a mixture of solidified metal from the surface of the precipitation, the core of the formation of bubbles up, make it grow. Therefore, the European standard pulley Which is good, too much in the melting process, to alloy oxidation and dissolution excessive gas, it is easy to make large pulley casting porosity produce precipitation, and distributed in various sections of the casting. 3 reactive pores between the high temperature molten metal is poured into the mold with material, and other cold iron and slag in the mold, due to the chemical reaction to form a gas, inside the pores caused by the casting, collectively referred to as reactive pores. Pulley pinhole test proved that the bottom surface of the thin-walled castings large pulley many pores; thicker skin pores larger pulley casting; sticky sand casting porosity at more; more wet than dry-type pores; adverse liquid steel deoxidation casting porosity more . Fault Timing Pulleys Timing Pulleys analytical failure analysis as follows: motor overheating is wrong with professional belt wheel in motion the process often resulting in the production of European standard pulley, treatment methods are as follows: 1, the proportion is greater than the belt round the medium configuration motor : equipped with appropriate motor belt round. 2, the pressure is too firmly packing gland or mechanical seal spring adjustment too tight: can spring gland or mechanical seal to adjust the amount of compression. 3, equipped with a pump of poor quality, or the existence of friction at the motor and pump shaft no concentric: Quality Check fitted and equipped to remove the fault. 4, wheel and shaft coupling: When the gear or pulley and shaft coupling, when it should be removed the same drive space. Specializing in the production of European standard pulley | Hengda Machinery (certified) | European standard pulley Hubei provided by Texas Hengda Machinery Limited. Texas Hengda Machinery Co., Ltd. (www.sddzhdjx.com) (www.sddzhdjx.com) is Dezhou, machining leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Hengda Machinery leadership in the staff warmly welcome all inquiries negotiations to create a better future Hengda machinery.