I. Overview of NRVZ Silent Check Valve:
Silent check valve refers to the valve that automatically opens and closes the valve flap based on the flow of the medium itself to prevent the medium from flowing backward. It is also known as a check valve, check valve, reverse flow valve, and back pressure valve. The check valve is an automatic valve, and its main function is to prevent the medium from flowing backward, to prevent the pump and the drive motor from reversing, and to release the medium from the container. Check valves can also be used to supply lines to auxiliary systems whose pressure may rise above the system pressure. Check valves can be mainly divided into swing check valves (rotating according to the center of gravity) and lift check valves (moving along the axis).
The valve consists of valve body, valve seat, fluid guide, valve disc, bearing pad and spring. The internal flow channel adopts a streamlined design, with small pressure loss, short opening and closing stroke of the valve disc, and can be quickly closed when the pump is stopped to prevent huge water hammer sound and form a silent effect. This valve is mainly used for water supply, drainage, fire protection, and HVAC systems. It can be installed at the outlet of the pump to prevent the medium from flowing backward and the water hammer from damaging the pump. 2. Main technical parameters:
|Seal test pressure||1.1||1.76||2.75|
|Shell test pressure||1.5||2.4||3.75|
|Medium temperature||X <80 ℃, T≤150 ℃, H≤200 ℃|
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