(5) the amount of leakage flow valve is closed from flowing out of the chamber into the oil leak will affect the minimum amount of stable flow of pig iron filter valve, so the amount of internal leaks as small as possible. (6) other work when the oil temperature changes affect traffic leaving viscosity changes, so ductile iron filter, often used for oil is not sensitive to thin orifice. Conditions of a flow control valve using a pneumatic flow control valve should be set at the inlet pipe valve. 2 flow control valve to send cement water content should be less than 1% threaded filters, temperature no higher than 120 ℃, no miscellaneous slag and clumps. 3 Install the slope should be within the range of 6% to 14%. 4 Flow control valve requires pressure 4.0-5.KPa, need air volume 1.5-2.0m [3] / m [2] .min. Performance should be consistent with a flow and other parameters as specified in Table 3.4. 2 flow control valve should be accurate and reliable control of material flow. When the three flow control valve work, the flanges are not allowed junction leakage. 4 actuators should reach full flow control valve is fully closed. The product should comply with the standard filter and procedures approved product plans and technical documents pretend been manufactured in accordance with the provisions of installation and use. Where the standard drawings and technical documents at the end of the technical requirements, shall comply with the general standard of national standards, building materials industry and electromechanical industry requirements. Linear dimensions of machined parts by the end of the injection tolerance GB / T1804 in m level. Welding shall comply with the provisions of JC532, in which the surface quality of welded joints of not less than grade Ⅲ; size tolerance level not less than c. Iron castings shall comply with the provisions of GB9439. Castings shall comply with the provisions of JC401.2-401.4. Copper filters, filters, electromechanical England by City Electrical Equipment Co., Ltd. of England. England City Electrical Equipment Co., Ltd. (www.gdyinglun.com) strong, credible, hydraulic machinery and components industry in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead England into the brilliant electromechanical and you work for a better future!