Almost all of us use check valves on a daily basis. These are used in many applications including water treatment, transportation and material handling. They are also suitable for use in chemical processes. They prevent the backflow of media. They are available in various materials such as aluminum, bronze, polyethylene, PVC, and brass. They are also designed with metal-to-metal sealing systems.
The manufacturer of check valves must have a good amount of experience in order to provide quality products. They must also know the needs of their customers in order to produce the best valves. They may offer different types of check valves such as spring assisted check valves, encapsulated spring design valves, pressure check valves, and self-sealing valves.
The construction of the valve varies from model to model. Normally, the valve’s body is made of carbon steel or ductile iron. It usually includes a disc and a seat. The disc opens when the flow of the liquid is directional and closes when the flow becomes reversible. The valve’s design is intended to allow the fluid to pass smoothly and prevent backflow. It can be made with metric or UNF threads. It can also be equipped with pneumatic actuation.
Check valves are also available in a wide range of sizes, from miniature to large. Depending on the size and the application, manufacturers may offer the valve with an angled plunger or cartridge-style body. A cartridge-style body is appropriate for applications with pressure differentials. The angled plunger design helps to prevent low-pressure leaks.
Other features of check valves include the seals, the o-ring, the ball, the pin and the stem. Some manufacturers offer modified models such as hydro testing, flange ups, and packing changes. The manufacturer’s selection of materials for the valve can help determine the durability and longevity of the valve. The materials are corrosion-resistant and can withstand heat. The material used can also be selected based on the required pressure and the type of fluid to be filtered through the valve.
The most common orientation of the check valve is horizontal. However, vertical or vertical-to-horizontal can also be used. The manufacturer must ensure that the materials selected for the valve are compatible with each other. Incompatible materials can lead to failure.
Among the most important factors when sketching a product diagram is the type of material the valve is made of. There are several options, including stainless steel, cast steel, and ductile iron. These materials are durable and can withstand corrosion. However, they are not very cost effective. They can be used for high-pressure applications such as cryogenics.
These valves can also be manufactured with a metal-to-metal sealing system, which is an effective way of preventing backflow. The sealing surface of the valve is lapped to ensure a tight shutoff. The manufacturer can also include a strainer on the inlet side of the valve to prevent the backflow of liquid. These valves can be used for water, gas, and oil. The valves are designed to be able to withstand pressures up to 15,000.
Check valves are used in a variety of industries, including the petroleum and chemical industry. They are used for flow control, line isolation, and head pressure maintenance. Various types of check valves are available, including the air blow, pressure-loaded, and dual fuel turbine valves.