Check Valve
0102030405
Products Sepcification
| Type | Swing Check Valve |
| Size | 16” |
| Pressure | 600LB |
| Connection | Flange End |
| Operation | / |
| Body Material | LCC |
| Design Standard | API6D |
| FTF Dimension Standard | ASME B16.10 |
| Flange Dimension Standard | ASME B16.5 |
| Test Standard | API598 |
| Application | W.O.G |
Feature
1. Simple Design:
Swing check valves have a simple design, consisting of a disc (or flapper) that swings on a hinge or shaft. The disc moves freely within the valve body to open or close the flow passage.
2. One-Way Flow:
These valves are designed to permit flow in one direction and automatically prevent backflow (reverse flow) when the fluid flow stops or reverses. This is achieved by the swinging action of the disc, which closes against the valve seat when backflow occurs.
3. Gravity and Flow-Operated:
The operation of swing check valves relies on gravity and the flow of the fluid. When fluid flows in the correct direction, it pushes the disc away from the seat, allowing flow. If the flow stops or reverses, gravity and the pressure of the returning fluid cause the disc to swing back and seal against the seat, preventing backflow.
4. Low Pressure Drop:
Swing check valves typically have a relatively low pressure drop because the disc is fully out of the flow path when the valve is open, allowing for smooth and unrestricted flow.
5. Full Bore Design:
Many swing check valves feature a full bore design, meaning the internal diameter of the valve is the same as the pipe it is connected to. This minimizes flow resistance and pressure loss.
6. Available in Various Materials:
Swing check valves are available in a wide range of materials, including cast iron, stainless steel, bronze, PVC, and other alloys. This variety allows them to be used with different types of fluids, including corrosive, abrasive, or high-temperature media.
7. Silent Operation:
Properly designed and installed swing check valves operate quietly, with minimal noise during the opening and closing of the disc.
8. Installation Flexibility:
Swing check valves can be installed in horizontal or vertical piping systems. However, in vertical installations, they are typically used in upward flow applications to ensure proper functioning.
9. Maintenance and Durability:
The simple construction of swing check valves makes them easy to maintain and repair. The disc and seat are the main components that may require attention. The durability of the valve depends on the materials used and the operating conditions.
10. Applications in Low to Medium Pressure Systems:
Swing check valves are commonly used in low to medium pressure systems. They are less suitable for high-pressure applications due to the potential for water hammer and pressure surges.
11. Various Types of Discs:
The discs in swing check valves can come in various designs, including flat, domed, or cushioned. Cushioned discs can reduce noise and wear during valve operation.
12. Resistance to Water Hammer:
Some swing check valves are designed to minimize water hammer, a phenomenon that occurs when fluid flow suddenly stops, causing a pressure surge. This can be achieved through slow-closing mechanisms or cushioned discs.
13. Bi-Directional Sealing Capability*:
While swing check valves are primarily designed to prevent reverse flow, they can also seal effectively in the forward direction, providing some level of protection against backflow even in fluctuating pressure conditions.
Application
Swing check valves are widely used in various industries and applications where preventing backflow is crucial. Here are some common applications of swing check valves:
1. Water Supply and Distribution Systems:
Swing check valves are used in water supply and distribution systems to prevent backflow, ensuring that water flows only in the intended direction. This is important for maintaining water quality and preventing contamination.
2. Wastewater Treatment:
In wastewater treatment plants, swing check valves are used to prevent the backflow of treated water, sludge, or other fluids. They help protect equipment and maintain proper flow direction in sewage and drainage systems.
3. Pumping Systems:
Swing check valves are commonly installed in pumping systems to prevent the reverse flow of fluid when pumps are shut off. This protects pumps from damage and prevents water hammer, which can occur due to sudden changes in flow direction.
4. Fire Protection Systems:
In fire protection systems, swing check valves are used to ensure that water or firefighting foam flows only towards the fire suppression equipment. They prevent the reverse flow of water, which could lead to system failure.
5. Oil and Gas Industry:
Swing check valves are used in the oil and gas industry to prevent backflow in pipelines, refineries, and processing plants. They are suitable for handling crude oil, refined products, natural gas, and other hydrocarbons.
6. Chemical and Petrochemical Plants:
In chemical and petrochemical plants, swing check valves are used to prevent the backflow of chemicals, acids, and other hazardous fluids. They help ensure safe and efficient operation by maintaining the correct flow direction.
7. HVAC Systems:
Swing check valves are used in heating, ventilation, and air conditioning (HVAC) systems to prevent the backflow of water, refrigerants, and other fluids. They are essential for maintaining system efficiency and preventing damage to equipment.
8. Power Generation:
In power plants, swing check valves are used in cooling water systems, steam systems, and fuel supply lines to prevent backflow. They help protect equipment such as boilers, turbines, and condensers from reverse flow and potential damage.
9. Marine Applications:
Swing check valves are used in marine applications, such as on ships and offshore platforms, to prevent the backflow of seawater, fuel, and other fluids. They help maintain the integrity of onboard systems and prevent contamination.
10. Agriculture and Irrigation:
In agricultural and irrigation systems, swing check valves are used to prevent the backflow of water, fertilizers, and chemicals. They ensure that irrigation systems function correctly and prevent the contamination of water sources.
11. Pharmaceutical and Food Processing:
Swing check valves are used in pharmaceutical and food processing industries to maintain sanitary conditions and prevent the backflow of process fluids. They are chosen for their ability to handle various fluid types and ensure hygienic operation.
12. Mining and Mineral Processing:
In mining and mineral processing operations, swing check valves are used to prevent the backflow of slurries, abrasive materials, and other process fluids. They help protect pumps and other equipment from damage.
13. Compressed Air Systems:
Swing check valves are used in compressed air systems to prevent the backflow of air, protecting compressors and other equipment from potential damage caused by reverse flow.
14. Cryogenic Applications:
Swing check valves are used in cryogenic applications to handle extremely low-temperature fluids, such as liquid nitrogen or liquid oxygen. They prevent the reverse flow of these fluids, ensuring safe and efficient operation.
Technical Drawing
