Slow -closing valve is also called inverse valve. Its role is to prevent the medium in the pipeline.Open closure can open or close by the medium flow and force to prevent the valve from reverse the medium.The stopper valve is an automatic valve class, which is mainly used for the one -way pipeline of the medium. It only allows the medium to flow in one direction to prevent accidents.This type of valve should generally be installed horizontally in the pipeline.
Principles of slow -closed stop valve
When the pump is started, the pressure of the valve inlet end prompts the valve petals to overcome the spring force to quickly open. At the same time, the medium of the main valve import end passes through the needle -shaped valve and the stopper valve to enter the diaphragm cavity.The opening degree of the needle -shaped valve enables the media to enter the diaphragm cavity to act on the diaphragm pressure plate, and produce reaction to the valve petals to ensure that the valve flap is slowly opened.Adjust the opening of the end -needle -shaped valve of the main valve, control the opening speed of the valve, ensure that the opening time of the main valve is greater than the start time of the pump motor, and the light -loading pump is achieved to prevent the motor starting current.When the water pump is closed, the pressure of the valve inlet end suddenly decreases, and the valve petals will suddenly be closed under the pressure of the outlet end, causing the pressure of the valve outlet to rise suddenly.At this time, the phenomenon of water hammer is prone to, causing the rear tube and equipment to damage the valve, and produce great noise.Because the return system is installed on the valve exit end, the back of the valve enters the diaphragm upper cavity through the ball valve. Due to the stopping effect of the stopper valve, the medium cannot enter the import end. At the same time, the inferior septum cavity is also full of the medium.Although the medium pressure of the upper cavity prompts the valve petals, the medium in the lower cavity cannot be discharged quickly under the throttling effect of small holes on the septum seat, producing a buffer process, which prevents the valve petals from closing the speed, reaching the slowdown, mute, muteThe effect prevents the phenomenon of water hammer.By adjusting the opening of the ball valve, the closing speed of the valve flap can be effectively controlled (that is, the closing time of the valve).
Slow -closed stop valve model
The main features of the 300X slow -closed stop valve model: 1. Slow -closed system performance is excellent, and it is not affected by the pipeline intermediary quality. The valve flap first slowly close and then closed, which can prevent the ring -breaking water hammer.2. Small body shape, light weight, and structure length of only about one -third of the rotary stop valve.3. Rubber buffer, stable, no vibration, no noise.4, rubber soft seal, good closed performance, abrasion resistance, long service life.5. It is smaller than the old -fashioned valve flow, and has obvious energy -saving effects.
Slow -closed stop valve price
Slow-closed back valve 300X-16 This slow-closed back valve comes from the Fugujian Sika valve brand and is sold by Shishi Siyika Water Heating Equipment Operation Department.The applicable medium is water, the manufacturing material is the ball and cast iron, which is suitable for use in the normal pressure and normal temperature environment. The connection method is flange, which can effectively improve the safety of the water system.A variety of models are available for users. The DN40 model is 255 yuan, the DN50 model is 255 yuan, the DN100 model is 415 yuan, the DN250 model is 1820 yuan, and the DN300 model is 1970 yuan.Micro -blocked and closed butterfly stop valve.It belongs to the SFCV rubber petal -type slow -closed stop valve. The manufacturing material is the ball and the cast iron, the connection method is flange, the structure form is butterfly, the applicable medium is clear water, sewage, seawater, suitable for use in low pressure environments. The suitable temperature range is 0To 80 degrees Celsius.The current market price is 150 yuan/piece.The 300X -type slow stop return valve of the cast iron type is manufactured by Wuxi Kars valve Co., Ltd. It belongs to the NRVR mute slow closed stop return valve.Apocalypse, the nominal diameter is DN15-100 (mm), the applicable medium is water, the shape is a plunger type, which is suitable for use in normal temperature and normal pressure environment.The current market price is 750/piece.

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