300X slow-closing check valve is composed of main valve, check valve, needle valve, ball valve, micro-filter and pressure gauge. Using hydraulic automatic operation, the main valve can get the best opening or closing speed. To prevent the occurrence of water hammer and water hammer, in order to achieve the effect of slow closing and noise reduction.
This product uses hydraulic self-control. It does not require other devices and energy. It is easy to maintain, and it can be opened and closed slowly.
This series of valve products are widely used in high-rise buildings, living areas and other water supply pipe network systems and urban water supply projects.
Working principle of 300X slow-closing check valve
When the valve feeds water from the inlet end, the water enters the main valve control room through the micro filter, needle valve, and check valve, and then drains downstream through the ball valve. Because the opening of the needle valve is smaller than the opening of the ball valve, that is, the drainage speed of the main valve control room is greater than the water inlet speed, the pressure in the control room decreases, and the inlet pressure acting on the lower end of the main valve disc opens the main valve to supply water downstream.
When the pipeline stops supplying water, if the downstream water starts to return, a part of the return water enters the main control room through the ball valve. Due to the check valve function, the return water cannot flow out of the main control room, causing the main control room to gradually increase pressure and slowly close the main valve. .
Fourth, the main technical parameters of 300X slow-closing check valve
|Nominal pressure (Mpa)||Shell test pressure (MPa)||Sealing test pressure (MPa)||Applicable medium||Medium temperature (℃)|
Five, the main parts of 300X slow-closing check valve material
|Part Name||Parts material|
|Body valve cover||WCB|
|Valve seat||Copper alloy|
|O-ring seal||Nitrile rubber|
|Needle valve||Copper alloy|
|Ball valve||Copper alloy|
|Float valve||Copper alloy|
|Micro filter||stainless steel|
Six, 300X slow-closing check valve
|Nominal diameter DN (mm)||Size (mm)|
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