FAQ of Flap Check Valve
What is a flap check valve?
Swing check valves, these valves are often called flap check valves. they usually provide good flow characteristics and usually need to be installed in a horizontal or vertical position with the flow upwards. flap check valves can help control the flow of material in a piping system.
Rubber Flapper Swing Check Valves feature a unique, simple design with only one moving part. The flapper does not swing from a hinge pin; it simply flexes open. The seat is on a 45° angle. The flapper travels 35° from open to closed, usually before column reversal can occur. It has non-slam characteristics. The valve requires no regular maintenance. Recommended for water, sewage, gas, oil and rubber lined for chemicals.
What is the difference between spring check valve and swing check valve?
The difference between swing check valve and spring check valve. The baffle in the swing check valve "swings" away from the seat to allow forward flow, and then swings back to the seat when the flow stops. In contrast, a spring-loaded check valve incorporates a spring to help close the check valve.
Uses of Flap Check Valves
Controlling the flow of material is a common desire of different industries and companies. The ability to manipulate the gas or liquid flowing through a system often determines the success of production. Typically, the flow is controlled to ensure that the material is properly filtered or refined and circulated to the proper area, or that the proper amount of material is delivered to the area needed for further production activities. flap check valves can help control the flow of material in a piping system.
Specifically, the flap check valve determines the direction of gas or liquid flow through the piping system. flap check valves are capable of opening fully in one direction, which allows a large amount of material to pass through without a significant impact on the overall volume or pressure of the flow. However, a flap check valve can only operate in one direction and the material cannot flow backwards through the system after it has passed in the desired direction.
The ability of the flap check valve to control the direction of material flow through the system may be critical to the operation of the machinery involved. In some cases, backflow can be incredibly disruptive to systems and equipment that are designed to handle substances in only one direction. In these cases, flap check valves help to ensure that operations always run smoothly. flap check valves can also be considered an insurance investment, as installing them will help prevent costly system overhauls and replacements in the future.
A flap check valve is usually very small. Other fixtures tend to take up more space in the piping than flap check valves. In addition, flap check valves are usually made of some sort of plastic material. Plastic materials do not usually pose any threat of contamination to materials moving through the piping system. However, other types of materials may not allow substances to pass through without risk of contamination. Flap check valves made of plastic also remain in good maintenance for a long time, especially because they do not rust when in contact with liquids.
Flap check valve is available in a variety of sizes and can be special ordered to fit the pipe size in a particular application system. If the flap check valve is larger than eight inches, the use of gaskets is also recommended. When installed with a flap check valve, the gasket allows the actual flap check valve to open fully without interfering with the flow of material passing through. Large flap check valves do not always require these gaskets, but companies should be aware of their availability in case their particular system would benefit from such an implementation.
The high reliability offered by flap check valves and the low maintenance levels make them ideal for many industrial companies. The various sizes and versatility of the available flap check valves allow each business to choose the one that best suits their purpose.
Flap Check Valve Operation
Instead of relying on a hinge pin to swing, the flap simply bends to open. The short stroke of the flap ensures quick closure before flow reversal. The fully resilient encapsulated disc itself is sealed and does not allow slamming.
Flap Check Valve Features
The flap check valve is particularly suitable for applications where the valve is to minimize pressure drop. The small footprint and light weight make the valve easy to operate.
