Application and performance analysis of foot valve:
The bottom valve is also called a check valve, which belongs to one of the low-pressure flat valves. The bottom valve mainly ensures the one-way flow of the liquid in the suction pipeline, so that the pump can work normally. When the pump stops working intermittently for a short time, the liquid cannot be Return to the water source tank to ensure that the suction pipe is full of liquid to facilitate the start of the pump. The bottom valve has a great role in saving energy. It is usually installed at the bottom end of the underwater suction pipe of the water pump. It restricts the liquid in the water pump pipe from returning to the water source, and plays the function of only entering and not entering. When it is not easy to block, it is mainly used in the pipeline of pumping water. The function of water channel and support. The caliber has single valve, double valve and multi valve type. There are flange connection and threaded connection.
Lifting Performance Specifications
Nominal pressure: PN0.25MPa
Nominal diameter: DN15～DN350
Applicable medium: water, oil, and non-corrosive medium Executive standard: Q/12 NJ3583-2001
Test standard: GB/T13927-1992
The bottom valve is composed of valve valve, valve disc, valve cover, bushing, sealing ring and other parts. See the figure below for details. The water from the water source enters the valve body from the valve cover. The pressure in the rear outlet pipe will quickly close the valve flap, and the liquid will not be poured back to the water source, which plays the role of smooth pumping and saving water energy loss.
1. In order to prevent the backflow of the medium, check valves should be installed on the equipment, devices and pipelines;
2. The check valve is generally suitable for clean medium, not suitable for medium containing solid particles and high viscosity;
3. Generally, vertical lift check valves should be used on horizontal pipelines with a nominal diameter of 50mm;
The above introduces the application and performance analysis of the bottom valve, the nominal pressure, nominal diameter, applicable medium and test standards and other specifications. I believe that everyone has a basic understanding of the bottom valve.