A swing check valve consists of a valve core, seat, and disk connected to a hinge. The disk spins to a horizontal plane to allow onward flow when the flow rate reaches a predetermined level. When the flow is stopped, the disk travels to the valve plate to stop any backflow. Read More…
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We make our check valves to be wear resistant and able to withstand the elements in sewage, sludge and slurries plus hold up to pressure drop. Rubber and full-metal-body check valves are offered. Contact us about your process piping needs. EVR Products is an ISO 9001:2015-registered company.
Manufacturing standard or custom check valves, pressure relief valves, needle valves, control valves, pressure regulators and instrument-quality tube fittings plus other flow and pressure control products is our business. Generant is ISO 9001:2000 certified. We have been in business for 75+ years.
Due to their swinging disks, swing check valves can only handle horizontal or vertical upward flows. A swing check valve’s use is limited because it can't support downward flow. Despite this drawback, swing check valves are capable of handling huge flow capacities. Swing check valves provide low flowing and flow pressure resistance.
Swing check valves open in one direction and close themselves when the pressure at the cracking point (the minimum level of pressure required to open the valve) drops. Swing check valves have a disk covering their opening, making them a type of butterfly valve. The disk is fastened to a hinge, allowing it to move open or shut in response to media flow. The valve’s body features an arrow that points which direction the fluid will flow as it enters and leaves the valve. The flow's pressure level forces the disk open, allowing a liquid stream to pass through. The pressure of the fluid or media pushing on the disk causes it to close when the flow is going in the wrong direction. The disk and rocker of the swing control valve are connected, allowing them to rotate at an angle about the pin shaft. Fluid flows in the designated direction when the intake force to the disk is greater than the resistance pressure. As the valve opens, the disk disengages from its seat and revolves around the shaft to the fully open position. The valve disk then spins back to the shut position as soon as the flow rate decreases. This disk movement stops fluid from flowing backward.
Types of Swing Check Valves
Swing check valves come in a variety of designs that can be broadly divided into tilting-disk and top-hinged categories. All swing check valves use a similar operational process. The primary distinction between these two groupings is the manner in which the valve disk is extended.
Top-Hinged Swing Check Valves
The top-hinged variation is the most prevalent type of swing check valve. The disk can open and close in a swing check valve by hinging to the interior top of the valve. The disk is situated on the rim of a fully-developed turbulent flow profile when it swings open.
Tilting-Disk Swing Check Valves
A tilting-disk swing check valve opens at lower flows and closes more quickly than other swing check valves. This speedier shutting lessens the water hammer effect (a pressure surge that results when a fluid is abruptly forced to change or stop movement) when there is reverse flow. After a tilting disk valve opens, its disk remains in the flow path.
Straight Swing Check Valves
A straight swing check valve features a horizontally-mounted disk that swings on a hinge pin. The pressure of an upstream flow opens the valve as a fluid passes through. This valve closes when the pressure drops. The disk lies on a seat ring to make a tight, uniform seal when a straight swing check valve is closed. A straight swing check valve’s seating surface is slightly angled to operate at lower pressures, create a good seal, and reduce shock when shutting.
Swing check valves are typically installed in pipelines to move water, chemical, and petroleum products.
Swing check valves can control and move corrosive media such as solid oxidizing agents, nitric acid, oil, and acetic acid.
Swing check valves work better with clearer fluids over thicker, viscosity- or solid-intensive environments.
Swing check valves are often used in water pumping and wastewater treatment applications because they perform effectively with big, predictable flows.
Swing check valves provide reliable service for pure process media in general.
Connectors for Swing Check Valves
Swing check valves with threaded connections are the most common connection mechanism for pipes in low-pressure systems. These valves bolt onto threaded pipes to create a secure and tight connection, as the term threaded suggests.
Flanged connectors provide the strongest connections for swing check valves and may be used with any network, regardless of valve size or press. This variety of swing check valve features twin flanges bolted together, one at their outlet and one at their inlet.
Press fittings may be used as a substitute for welding and soldering valves to pipes. Press fittings are specially-made connectors designed to attach swing check valves to pipelines using a hydraulic tool. Press fittings feature a sealing element that forms a consistent, dependable connection when pressed. Press fittings are also called press and crimping connectors.
The valve holes on a swing check valve are slightly bigger than the pipe sizes they work with. Therefore, swing check valves are coated with solder (“sweat”) that drips into the spaces between a pipe as it is slid onto the pipe. Sweat fittings are most commonly used with copper piping.
Choosing the Right Swing Check Valve Supplier
To ensure the best outcome when purchasing swing check valves from a swing check valve company, it is critical to compare several companies using our directory of swing check valve suppliers. Each swing check valve supplier has a business profile page highlighting their areas of expertise and capabilities, along with a contact form to directly communicate with them for more information or to request a quote. Review each swing check valve business website using our patented website previewer to get an idea of what each company specializes in. Then, use our simple RFQ form to contact multiple swing check valve businesses using the same form.
Swing Check Valves Informational Video
Check Valves Power Pages
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