There are two forms of nitrogen sealed tank are in normal operation, the two forms of nitrogen source of nitrogen pressure are nitrogen, nitrogen gas cylinders to the nitrogen pressure is very high, but the nitrogen gas pipe is thin, no pressure reducing valve, and the nitrogen sealing valve directly into self-reliance type, self-reliance type nitrogen sealing valve has the function of the automatic voltage regulator, no need to set the pressure reducing valve in front and storage tank of the nitrogen sealed pressure is very low, we control in the plus or minus 500 pa, for the protection of storage tank type is fitted with through self-reliance type nitrogen sealed Industrial Valves installed in the storage tank on the top of the nitrogen sealed valve to control, the nitrogen sealed valve is also provided by self-reliance type valve manufacturer, the function of nitrogen sealed valve is play the role of the safety of work with self-reliance type control valve, the pressure is too high, such as when the tank pressure in + 500 pa, while nitrogen sealed Industrial Valves to stop into the nitrogen, but when tank to continue into the material tank pressure rise, the tank inside the material by nitrogen sealed valve discharge gas, in order to maintain the gas pressure inside the tank to maintain no more than + 500 pa, the storage tank overpressure, we don't set the relief valve, but by nitrogen sealed Industrial Valves control, when the tank pressure will be lower than - 500 pa, self-reliance type regulator into the nitrogen so that the tank pressure is not too low. There is a kind of form is self-reliance type valve with double water seal breather tank, storage tank pressure and control + 500 pa, the working principle of the basic same, when the pressure up to + 500 pa, gases in storage tank through the water seal tank breathing, keep up the pressure inside the tank is not more than + 500 pa, when the pressure inside the tank is too low, on the one hand, self-reliance type regulator action add nitrogen to the storage tank, in order to maintain the nitrogen pressure is not too low, one thousand self-help type valve failure, another water seal tank breathing may play a role, the gas through a water seal into the tank, in order to maintain storage tank pressure is too low to - 500 pa, avoids the suction disadvantages of storage tank, the form and no relief valve. The above form, that is, to prevent the positive pressure tank may lead to the overpressure phenomenon, also avoid the tank negative pressure may lead to the storage tank to suck disadvantages of phenomenon, ensure the safety of the storage tank. Failure analysis and processing ( 1) A large aromatic early gear drive, the found 24 nitrogen sealed valve doesn't work properly. Open valve inspection, found that the nitrogen gas sealing valve pilot valve, main valve and two valve core indoor wall with a thick layer of dirt, after wiping, besmear after grease can be used normally. In the seat also found some rust, welding slag lead to drive after the pipe residual impurities such as by blowing nitrogen into nitrogen sealing in the valve, the main valve can not return to seat. ( 2) Pressure pipe blockage. If the pilot pressure pipe blockage, nitrogen sealed valve without feedback signal, can also cause nitrogen continuously added to the tank, follow the steps as shown in figure 3 check whether belong to this kind of reason. ( 3) Spring force. If the pilot valve, main valve chamber and two valve core is not dirty, and guide tube is not blocked, check the gas under the pilot valve small spring elasticity, if the tension is reduced, can make constantly fill gas nitrogen sealed valve. Spring can be stretched, increase its elasticity. ( 4) Sealing ring damage. Gas pilot valve in the working process of the action is more frequently. Make the seal ring is often the impact of the seat, which leads to the sealing ring wear or fracture, not seal effect, replace the sealing ring can be. ( 5) Control the gas inlet and gas pilot valve outlet. This is a question of product quality. Combined with nitrogen sealed valve working principle diagram, can judge.
Building a brand as Mech from the very start is simple so long as you keep 'the three C's' in mind: clarity, consistency and constancy.
go to Mech Valve to get an amazing offer at favorbale price. the flow control valve os & y valve fire protection actually works and is worth a try.
Mech focuses on three key elements—process, people, and technology—the authors found that people of two seemingly opposite cultures are able to work together in a project-based environment to complement each other and reap mutual benefits for a win-win result.
Shenzhen Mech Valve Trading Co., Ltd. who primarily serve our consumers need to consider offering their products in an os&y valve such as double flanged gate valve to take advantage of the growing interest from consumers in supporting resilient seal gate valve.