1、 Overview of Stainless Steel Clamp Check Valve:

The stainless steel clamp check valve adopts a new type of material and is made of corrosion-resistant stainless steel. It can be installed on any position of the pipeline to prevent backflow of the medium and backflow of the boiler feedwater system. The connection method is to use the existing flange clamps at both ends of the pipeline to put it into operation. Its various indicators are superior to any type of return valve currently available on the market. It has a wide range of applications, and can be used in any medium such as water, gas, oil, acid, alkali solution, hydrogen, ammonia, special fire-fighting pipelines, etc.

Check valves are used in pipeline systems to prevent reverse flow of media, reverse rotation of pumps and their drive motors, and release of media from containers. Check valves can also be used on pipelines to supply auxiliary systems where the pressure may rise above the main system pressure. Check valves can be applied to pipelines with various media depending on the material. A check valve installed on a pipeline becomes a fluid component of the complete pipeline, and its valve disc opening and closing process is affected by the transient flow state of the system it is in; Conversely, the closing characteristics of the valve disc have an effect on the fluid flow state.

2、 The working characteristics of stainless steel clamp check valve:

The working characteristics of check valves are large load changes, low opening and closing frequency, long applicable cycle once put into the closed or open state, and no requirement for moving parts. But once there is a requirement for "switching" again, it must be flexible in movement, which is more demanding than common mechanical movements. Due to the fact that check valves are qualitatively determined to be used for quick closure in most practical applications, the medium flows in a directional manner at the moment of check valve closure. As the valve disc closes, the medium rapidly decreases from a large reverse flow velocity to zero, and the pressure rapidly increases, resulting in the phenomenon of "water hammer" that may have a destructive effect on the pipeline system. For high-pressure pipeline systems with multiple pumps connected in parallel, the water hammer problem of check valves is more prominent. Water hammer is a pressure wave in transient flow in pressure pipelines, which is a hydraulic shock phenomenon caused by changes in fluid velocity in pressure pipelines, resulting in pressure jumps or drops. The physical cause of its occurrence is the combined effect of the incompressibility of the fluid, the inertia of fluid motion, and the elasticity of the pipeline. In order to prevent water hammer hazards in pipelines, new structures and materials have been adopted in the design of check valves for many years. While ensuring the applicability of check valves, gratifying progress has been made in reducing the impact force of water hammer. A check valve refers to a valve that automatically opens and closes the valve disc based on the flow of the medium itself, used to prevent the backflow of the medium. It is also known as a check valve, one-way valve, backflow valve, and back pressure valve. Check valve belongs to an automatic valve, whose main function is to prevent medium backflow, prevent pump and drive motor from reversing, and prevent the release of container medium. Check valves can also be used on pipelines to supply auxiliary systems where the 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).

3、 The working principle of stainless steel clamp check valve:

The function of this type of valve is to only allow the medium to flow in one direction and prevent directional 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 disc act on the valve seat, thereby cutting off the flow.

Stainless steel clamp check valves belong to this type of valve, which includes swing check valves and lift check valves. The swing check valve has a hinge mechanism and a valve disc like a door that freely rests on the inclined valve seat surface. In order to ensure that the valve disc can reach the appropriate position on the valve seat surface every time, the valve disc is designed in a hinge mechanism so that the valve disc has sufficient swing space and truly contacts the valve seat. The valve disc can be made entirely of metal, or it can be embedded with leather, rubber, or a synthetic cover on top of the metal, depending on the performance requirements. When the rotary check valve is open, the fluid pressure is almost unobstructed, so the pressure drop through the valve is relatively small. The valve disc of the lift check valve is located on the sealing surface of the valve seat on the valve body. Except for the valve disc, which can be freely raised and lowered, the rest of this valve is like a globe valve. Fluid pressure lifts the valve disc from the sealing surface of the valve seat, causing the medium to reflux and causing the valve disc to fall back onto the valve seat, cutting off the flow. According to the usage conditions, the valve disc can be made of all metal structure or embedded with rubber pads or rubber rings on the valve disc frame. Like globe valves, the passage of fluid through lift check valves is also narrow, so the pressure drop through lift check valves is greater than that through swing check valves, and the flow of swing check valves is less restricted