Lift Check Valves

The primary function of a check valve is to automatically close and prevent reverse flow, safeguarding against damage caused by liquids passing through the pipe in the wrong direction. Lift Check Valves prevent reverse flow or backflow of liquid and ensuring smooth, uninterrupted flow through the system.

The operation of a lift check valve is entirely automated, relying on gravity and media pressure to work.

Lift Check Valves fluid flow must always enter below the seat. As the flow enters and pressure increases, the disk will begin to lift off the seat, allowing flow to pass through the valve. The disc or ball is raised within guides from the seat by the pressure of the upward flow. When the flow stops or reverses, the disc or ball is forced onto valve seat by both the backflow and gravity.

Lift Check Valves are an excellent valve solution for ensuring flow stops in the desired direction and that pressure levels remain consistent. This makes them a valuable addition to any system requiring reliable control of flow and pressure.

Check Valves have been designed for applications involving high pressures and temperatures. They are suitable for use with steam, water, oil, fuel applications, and other gases. Check Valves can be constructed from various specialist materials such as nickel aluminium bronze, stainless steel, super duplex and titanium. The choice of material depends on application requirements, flow rates and the corrosive nature of the fluid or media being handled.

Horizontal Lift check valves are installed in the horizontal position within pipelines. They feature a lift disc connected to the valve’s stem. The rotation of the stem is what makes it possible for the valve to open or close when necessary. While Vertical Lift Check Valves are designed for installation in vertical pipelines and operate similarly to horizontal lift check valves. They feature a stem that allows for manual actuation of the valve, enabling it to open or close when necessary.

Generally, horizontal and vertical lift check valves are installed in pipelines with upward flow and can also be used for pressure control applications, including water distribution systems, sewage and drainage systems, fire protection systems and more.

• High flow efficiency
• Threaded ends are ideal for low-pressure applications
• Few moving parts
• Easy installation and maintenance
• Can be used with solids, gases or liquids
• Durable and long-lasting
• Relatively short lift to obtain full valve opening

These valves are highly dependable and provide safe operation under the most demanding conditions. They are a preferred choice for many industrial and commercial applications, such as power plants, water supply systems, thermal oil systems chemical processing facilities and other high-pressure applications.

• High cost due to their specialised design and materials used
• Limited flow rates in certain applications
• Operate in a completely enclosed system
• Wear and tear may occur due to constant opening and closing cycles
• Can be affected by corrosion or erosion if not maintained regularly
• Deliver slightly higher energy costs

• Metal seating provides a long service life in elevated temperature applications
• Suitable for use in high-pressure and high-temperature applications
• Low maintenance
• Easy installation and repair
• High flow rates due to the swing disc design

• Higher manufacturing costs than lift check valves
• Not suitable for applications with high-pressure or long-distance pipelines
• More prone to clogging and build-up of debris due to the swing disc design

The lift check valve and swing check valve both have their advantages, depending upon the application. Both valves are reliable, cost-effective, and provide good control overflow direction in a pipeline system.

Other valves such as the globe valve or ball valve may be more suitable for certain applications and should always be considered when reviewing the application. It is also important to select the right material of construction for the application at hand. This will extend the valve’s life, deliver value for money and ensure maximum performance.

All safety guidelines and regulations should be followed to ensure safe use. Regular inspection, testing and maintenance will help to keep the Lift Check Valve functioning properly and delivering proven performance over extended periods.

The Lift Check Valve are an essential component of many fluid systems and provides critical protection against backflow and pressure surges. Therefore, it is an excellent solution for many industrial and commercial uses. Contact us for more information on the suitability of the Lift Check Valve range.