Tianjin KXC Metal Products Co., Ltd.

●The operating pressure, i.e., the pressure at which the medium circulates through the valve. ●Flow rate and velocity of the fluid. The flow rate and rated velocity are essential elements to help you select the right valve, especially for regulating that flow. The flow coefficient (Kv) is a theoretical value specified by the manufacturer that allows you to calculate the nominal flow rate of the valve. It can be expressed in liters per minute (l/min) or cubic meters per hour (m3/h). The valve manufacturer provides charts to determine this coefficient based on the required flow rate and nominal diameter. ● The nominal diameter (DN) of the circuit  in which the valve is located. This is essential to avoid oversizing the valve, which may lead to unstable operation of the equipment, or to avoid undersizing, which may lead to a significant pressure drop and rapid valve damage.

In order to calculate the size of a valve, you need to know the parameters related to the operation of the circuit. ●The pressure is an important factor that must be taken into account, on the one hand to avoid undersizing the valve, which could lead to problems in terms of leakage or rupture of the valve, and on the other hand to avoid oversizing the valve. ●The operating temperature needs to be determined, i.e. the temperature of the circulating medium, as well as the ambient temperature around the valve body. It is important to know the temperature extremes that the valve needs to withstand in order to be able to select the valve that can be used to operate under these conditions,  especially the materials used to manufacture the body, shut-off system and seals . ●The operating pressure, i.e., the pressure at which the medium circulates through the valve.

  Rubber Flap Check Valve The parts design is mainly composed of three main parts: valve body, valve cover and rubber flap. The rubber flap in the valve is made of steel plate, steel rod and reinforced nylon cloth as the substrate, and the outer layer is covered with rubber. The valve flap has a life of up to 1 million times. The H44X (SFCV) series rubber flap check valve adopts a full flow area design, which has the characteristics of small head loss, not easy to accumulate debris, and easy maintenance. It is mainly suitable for horizontal installation of water supply and drainage system, and can be installed at the outlet of the water pump to prevent backflow and water hammer from damaging the pump. The H44X (SFCV) series rubber flap check valve can also be installed on the bypass pipe of the water inlet and outlet pipes of the reservoir to prevent the pool water from flowing back into the water supply system.   The Working Principle of the Check Valve Check valve refers to the valve

As a   check valves supplier , I will show you 5 different types of check valves. Types of Check Valves Swing Check Valve Swing Check Valve The disc of the swing check valve is disc-shaped, and it rotates around the shaft of the valve seat passage. Because the passage in the valve is streamlined, the flow resistance is smaller than that of the lift check valve. It is suitable for low flow rates and infrequent changes in flow. It is not suitable for pulsating flow, and its sealing performance is not as good as the lifting type. Swing check valves are divided into three types, single-leaf type, double-leaf type and multi-half type. These three types are mainly classified according to the valve diameter. The purpose is to prevent the medium from stopping or flowing backwards and weaken the hydraulic shock.   Lift Check Valve Lift Check Valve A check valve whose disc slides along the vertical centerline of the valve body. A lift check valve can only be installed on a horizontal pipeline. A