Five Connection Methods for Chemical Pump Valves And Pipelines

The correct connection method between chemical pump valves and pipelines or equipment will directly affect the probability of pipeline valves running, emitting, dripping, or leaking. The common connection methods for valves include flange connection, clamp connection, butt welding connection, threaded connection, ring connection, clamp connection, and self sealing connection.

(1) Flange connection

The flange connection corresponds to the flange on the chemical pump valve and the pipeline. It is connected to each other by flanges, gaskets and bolts. The flange is installed in the pipeline through bolts. The flange connection is the connection between the valve and the pipeline or equipment. The most commonly used connection form. Pipe flange refers to the flange used for piping in pipeline installations. When used on equipment, it refers to the inlet and outlet flanges of the equipment. Flange connections are easy to use and can withstand large pressures. Flanges The connection can be applied to valves of various nominal sizes and nominal pressures, but there are certain restrictions on the operating temperature. Under high temperature conditions, the flange connecting bolts are prone to creep and cause leakage. Generally, flange connections It is recommended to use it at a temperature of ≤350℃.

(2) Clamp connection type.

The valve is installed in the middle of the two flanges. The valve body is usually equipped with positioning holes to facilitate the installation and positioning of chemical pumps. Bolts are used to directly clamp the valve and two pipes together.

(3) Welding connection

a. Butt welding connection: Both ends of the valve body are processed into butt welding grooves according to butt welding requirements, corresponding to the pipe welding groove, and are fixed on the pipe through welding. The butt welding connection can be applied to various sizes, various pressures and High temperature working conditions.

b. Socket welding connection: Both ends of the valve body are processed according to the requirements of socket welding, and are connected to the pipeline through socket welding. Socket welding connection is generally suitable for valves ≤DN50. .

(4)Threaded connection

This is a simple connection method, with both internal and external threads.

(5) Clamp connection

This is a quick connection method that requires only two bolts and is suitable for low-pressure valves that are frequently disassembled.

There are many ways to connect valves and pipelines. For example, some small valves that do not need to be dismantled are welded to the pipes; some non-metal valves use socket connections, etc. Users should make specific choices based on their specific circumstances.