Lift Check Valves

The function of a Hanno Valve’s Lift Check Valve is to only allow the medium to flow in one direction and prevent reverse flow. Usually, this type of valve works automatically, and under the pressure of fluid flowing in one direction, the valve disc opens; When the fluid flows in the opposite direction, the pressure of the fluid and the self weight of the valve block act on the valve seat, thereby cutting off the flow. Internal thread check valves and butterfly check valves belong to this type of valve, which includes swing check valves and lift check valves. The rotary check valve has a hinge mechanism and a door like reading seat that can freely rest on the inclined surface of the temple seat. In order to ensure that the valve can reach the appropriate position on the valve seat surface every time, the valve is designed in a hinge mechanism so that the valve has sufficient swing space and allows for true and comprehensive contact with the valve seat during adjustment. Valves can be made entirely of metal, or they can be molded into skin seedlings on the entire wall or replaced with protective surfaces. This determines the performance requirements of the dry body. When the opening type return net is fully opened, the damping force is almost flat without being affected by sunlight. Therefore, the damping force drop of the opening test door is relatively small, and the surge pin between the rising type north return is located on the sealing surface of the valve seat on the valve body. Except for the valve that can be freely raised and lowered, the rest of the valve is like a globe valve. The fluid pressure causes the valve to lift off the sealing surface of the valve seat, and the medium reflux causes the valve to fall back onto the valve seat and cut off the flow. According to the usage conditions, the reading arrangement can be made of all metal structure, or embedded with rubber pads or rubber amine rings on the adjustment frame. Like a carrier, the channel for fluid to pass through the lifting type return valve is also narrow, because the pressure drop through the lifting type return valve is greater than that of the family opening type return valve, and the flow of the rotary check valve is less restricted,

Product features:

1. The gap of the rising peak check valve is disc-shaped and rotates around the axis of the valve seat channel. Due to the wide inner channel forming a flow line, the flow resistance is smaller than that of the rising butterfly valve, making it suitable for situations with low flow velocity and large mouth diameter where the flow does not change frequently. However, it is not suitable for pulsating flow, and its sealing performance is not as good as that of the lifting type. Butterfly check valves are divided into three types: single disc, double disc, and half disc. These three forms are mainly classified according to the valve diameter, in order to prevent hydraulic shock when the medium stops flowing or flows back.

2. Lift check valve: a check valve that slides along the vertical centerline of the valve body. Internal thread check valves can only be installed on horizontal pipelines. For high-pressure small-diameter check valves, a spherical valve can be used. The butterfly check valve body has the same shape as a globe valve (which can be used interchangeably with globe valves), so its fluid positive force coefficient is relatively high. Its structure is similar to that of a globe valve, and the valve body and valve stem are the same as those of a globe valve. The upper part of the valve and the lower part of the valve cover are machined with guide sleeves, and the valve guide cylinder can freely rise and fall inside the valve cover guide sleeve. When the medium flows downstream, the valve is opened by the thrust of the medium. When the medium stops flowing, the valve falls on the valve seat by self sagging, playing a role in preventing the reverse flow of the medium. The direction of the medium inlet and outlet channels of the straight through coal type check valve is perpendicular to the direction of the valve seat channel; The vertical lift check valve has a medium inlet and outlet channel direction that is the same as the valve seat channel direction, and its flow resistance is smaller than that of the straight through type.

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