EXCESS FLOW CHECK VALVES
Model: SLLF-150LB-10
Introduction to Overflow Valve:
The built-in overflow valve is a medium flow rate overpressure safety relief device. It (overflow check valve Excess Flow Check Valves) is used to install in the outlet direction of the pipeline of the storage tank and must be installed as close to the storage tank as possible. Its (wafer excess flow valve WAFER EXCESS FLOW VALVE) is installed to ensure that when the fluid flows outside the storage tank, If the downstream of the pipeline breaks or leaks, it can timely cut off the flow direction. When the high-speed fluid is output from the storage tank, it will push the valve disc to the closed position. Each overflow valve (flow valve) has been designed with a specific closing flow rate in the factory Only fluids below this specific flow rate are allowed to pass through.
EXCESS FLOW CHECK VALVES is a valve that is opened when the pressure difference is normal. When the flow pressure rises, it will be closed due to the pressure difference between the inlet and outlet, and the valve (Excess Flow Check Valves) will be closed all the time as long as the pressure difference between the front and the back of the valve remains unbalanced. Obviously, unless the pressure of the storage tank is too low to maintain the closure of the excess flow valve, under normal circumstances, if the excess flow valve is properly installed and the size of the pipeline and pipe fittings is appropriate, when the downstream pipeline is exceptional, the excess flow check valves will automatically close.
When the system needs to be repaired, the small flow hole on the valve cover will allow small flow to pass through, so as to balance the front and rear pressure of the valve and restore the open position of the overflow valve (flow limiting valve) for the next use. For the installation position of the overflow valve, please avoid that the device with limited flow is near the inlet and outlet pipelines, and the pipe fitting size cannot be lower than the size of the overflow valve (constant flow valve).
Overflow valve The initial closing flow value of is slightly different from the actual closing flow value, which is generally the source of the chattering sound of the valve. We have designed as far as possible to minimize the difference of the built-in overflow valve in this range. It should be said that at present, no manufacturer can design a range without this phenomenon, including Hemco, BGRS, Inc, MGM Valves and Taiwan Qianhan International Co., Ltd. are the same phenomenon. This range varies with the size of the valve and has no consistent relationship with the larger flow. In general, the higher the strength of the spring, the larger the flow value of Zuei, and the larger the range of clicking.
SLLF-150LB-10 overflow valve (고류형밸브브브) can be closed stably and without interruption under the rated zuei large flow. As long as it exceeds the set closed flow value, the overflow valve will automatically close. Therefore, the Zuei large flow value is somewhat different from the closed flow value. Generally, we recommend that the closed flow value be 1.5~2 times of the normal flow value.
