Soft-sealing gate valve and hard seal gate valves can be complementary to each other, can independently again out of the gate, were two most important categories of gate valve series, soft seal gate valves are suitable for the production of large diameter in particular, the following is said that when the choose and buy how to selection, and see it together. A, plate or wedge valve valve? Soft seal valve plate and wedge two types, both have large size, suitable for the characteristics of large diameter valve production, but the former is applicable to steam, water, oil, corrosive acid gas, oxidizing substances and flue gas dielectric fluid, and wedge gate valve is not can be used for regulating valve, can only be full open or full close, wedge gate valve is suitable for high temperature and high pressure of harsh working environment, as well as to the sealing conditions of high demand. Second, the single ram or double ram? Various types of medium plate gate valve, and good regulation performance, are lightweight, but should pay attention to is not applied to the fluid flow control, easy to coking connection in the pipeline system, should be installed in the position of the switch more frequently. City gas, water pipe, medium containing suspended particles, industrial gas pipeline using single or double ram appropriate gate, according to the actual work requirements, or reference manufacturer recommendations. Urban tap water pipeline project choice soft-sealing gate valve, often for no diversion kongming pole plate gate valve, gas transmission pipelines are multi-purpose seal type stem flat gate valve. Two types of soft-sealing gate valve, flat gate valve application range is relatively wide, and in high temperature and high pressure, pipe with vaporization, low-temperature cryogenic gas hole phenomenon, recommended wedge gate Industrial Valves. Under the simple instructions below soft-sealing gate valve stem form and non-rising stem form of distinction. 1 what are the prominent rising stem gate valves rising stem gate valves and the advantages of non-rising stem gate valves, are only have switch opening and closing function of industrial valves, open-close part is damper, was observed in external stem movement direction and height, using high quality imported manufactured nodular cast iron, so, what are the product advantages of rising stem gate valves? A, weight light, the intensity is sold on the market is rising stem gate valves of the production of ductile cast iron, the precise size and ingenious structure, makes the weight of the rising stem gate valves is very light, the intensity is also very reliable, strong bearing capacity, good sealing, resistance to friction and wear, have all pipeline valve performance requirements. Rising stem gate valves with soft-sealing gate valve and hard seal gate valves, soft-sealing gate valve adopts integral wrapped slurry design, superior overall coverage of the performance, so the gate valve sealing completely withstand test. Ductile iron material is qualitative light weight, so also easy to install. Second, flat type seat rising stem gate valves and non-rising stem gate often used for purifying system of urban sewage sludge, so the same flat as the pipe seat design can reduce sundry silt accumulation, sealed performance is more reliable, ensure the effect of sewage purification treatment, customers use more at ease. Three, cleaning, maintenance convenience compared with non-rising stem the rising stem gate valve gate valve of another advantage, is to clean and maintain more convenient and concise, gate valve chamber internal use avirulent epoxy resin as a coating, corrosion resistance and anti oxidation rust prevention effect is better, improve the quality of water treatment, water supply. And rising stem gate valves can also be based on user needs, equipped with pneumatic or electric elements such as execution system and switch opening and closing device, more convenient customer manipulation using rising stem gate valves open and close. 2 master this time, easily distinguish non-rising stem gate and rising stem gate valves. Non-rising stem gate valve is a gate can only do full open or full close, not regulate the function of the fluid, the most common of which are very good wedge gate valve sealing. So, when should choose a non-rising stem gate Industrial Valves? Non-rising stem and what is the difference between rising stem gate valves? One, the working principle of the different non-rising stem gate valve opening and closing, the steering wheel and stem is relatively static, not occur relatively transmission, non-rising stem gate valve opening and closing is made up of stem in fixed point rotation to drive the valve opening and closing, to keep the valve fully open or close state. And rising stem gate valve opening and closing is made from the stem and the steering wheel relative to transmission, so as to lift the disc, the Industrial Valves opening and closing. Rising stem gate valves can see screw, while non-rising stem not, reason has 'non-rising stem' and 'stem'. Non-rising stem gate 2, installation conditions for installation requirements is not high, the small size of the installation height, while rising stem gate valves need to be fully enough installation space. Non-rising stem gate valve gate in the motion direction and vertical direction of fluid medium, according to the type of gate can be divided into flexible disc and rigid disc. Three, judgment switch working state for non-rising stem drive screw is located inside the valve gate valve, the switch of gate lifting just inside the gate, so I can't through external the movement direction of the valve stem position judgment gate opening and closing. Rising stem gate valves and non-rising stem gate valves open and close are no obvious signs, so by flipping the handwheel, non-rising stem valves only size peace work experience, judgment of gate opening. Rising stem gate and non-rising stem gate difference is very obvious, although the rising stem gate valves used more widely, but in some of the work environment and pipeline conditions, non-rising stem gate is also indispensable. This article by all standing valve ( News) Editing and publishing
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resilient seated valve double flanged gate valve are used largely for resilient gate valve such as cast iron gate valve.