Stainless steel gate is one of the valve we are now the most widely used, because of the small resistance, simple type of body and so on by the public, so how did it work? Let's take a look at. The working principle of stainless steel gate valve: gate valve, the gate, as with the stem straight line called lifting lever gate ( Also called rising stem gate valves) 。 Usually in lifting lever on the trapezoidal thread, through the valve at the top of the nut and guide groove on the valve body, the rotation movement into linear motion, which is the operating torque thrust into operation. Sealing surface can only rely on medium pressure to seal, that is, to rely on medium pressure to press the sealing face of gate to the other side of the seat to ensure sealing face seal, this is the seal. Most is adopt compulsory seal gate valve, the valve is closed, to rely on outside force forced the ram pressure to the seat, to ensure the sealing surface sealing. Stainless steel gate valve features: 1, well-selected materials, in line with the relevant standards at home and abroad, the material of high quality in an all-round way. 2, conform to the requirements of domestic and international advanced standard, reliable sealing, excellent performance, beautiful appearance. 3, seal pair of advanced and reasonable, the disc and seat sealing surface with different hardness of too stand ( Stellite) Cobalt-based hard alloy surfacing and become, reliable sealing, high hardness, wear resistance, high temperature resistance, good corrosion resistance, abrasion resistance, long service life. 4, the valve stem through surface nitriding treatment and conditioning, with good corrosion resistance, abrasion resistance and abrasion resistance. 5, adopting the wedge gate structure, large diameter setting thrust bearing, friction small, with the impact of manual, easy opening and closing. Electric gate valves can be installed in horizontal or vertical line, double disc gate valves should be installed in horizontal pipe runs, and the first located above the valve, inadequate Xu Chao under installation. Gate valves to the flow direction of medium is not restricted. Electric gate valve cover explosion-proof electric gate valves, stainless steel electric gate valves, electric flat gate valve and so on. Electric valve actuators can be according to customer's selection of intelligent a body shapes, outdoor, etc. , and normal connection usually adopt welding connection flange connection special occasions are also useful. High temperature, high pressure, the medium due to the change in temperature may make the electric gate valve gate wedge to death, at the same time due to the medium temperature is not uniform throughout, easy cause seal adverse phenomenon. Wedge gate valve is especially obvious. When the electric gate valve opening and closing torque is bigger, in order to reduce the open-close torque for large diameter and high pressure valve, can be used to install by-pass valve. Bypass Industrial Valves installed in the main gate of the external, connected to the both sides of the gate valve of imports and exports, and connected. Open the bypass Industrial Valves should be taken before the main valve opens, media into the valve after the pressure difference before and after the main gate valve plate is reduced, so as to reduce the main gate of the open torque. The calibre of the by-pass valve selection should be based on the main gate diameter can be used to consider. Gate valve sealing performance than cut-off Industrial Valves, gate valve is the cut-off valve, gate valves are normally applied to don't need to often open/close, and keep the gate full open or full close condition, is not suitable for regulating the flow of medium and pressure. If used to adjust for a long time, the sealing surface easily be medium erosion wear and affect the sealing performance. In order to ensure the normal operation of stainless steel gate valve, extend the use fixed number of year, regular inspection maintenance must be done well: stainless steel gate valves on sewage often attach to aquatic organisms, weed and water to keep clear of in time before the brake floater, prevent rocks and debris out entry slot. The gate on the river silt, regularly and sand deposition prevention; Trash rack must clean-up on a regular basis. Winter to avoid gate under static ice pressure, but not frozen tank or other measures, the gate is separated from the ice. To check the working state of the gate, in view of the defects could be or have been made, take timely rust removing rust and stop leakage leakproof, vibration and anti-cavitation measures, to ensure that the stainless steel gate valve and the safety of the pier, the building such as bridge work. Stainless steel gate hanging on the door should be locked when groove, the bottom of the door to leave the orifice than a distance, so as to avoid water gate resistance. To often to various rotational parts filling lubricating oil, often have check gate without deformation, crack, the phenomenon such as welding, all kinds of connection and embedded firmware is loose, fall off, lifting point structure is stable, and whether the water seal aging or damage to the water seal is closed contact, there is a problem should be handled in time. Stainless steel gate valve for opening and closing to strictly abide by the operation procedures and prevent damage of gate or other adverse consequences. Stainless steel gate vibration occurs when water is found, the opening of the gate is should be adjusted through the test, or shall adopt other measures for vibration control. This article by all standing valve ( Technology department) Editing and publishing
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