Classification And Corresponding Functions Of Pigging Valves

1. Function of the cleaning valve.

Valves can be divided into clean pipe and non-clean pipe. Standard commercial valves, plug valves and ball valves are non-clean pipe valves. In a clean system, they can be installed at the outlet of the sending/collecting station. For example, when using propellants in a factory, valves often connect clean pipes and non-clean pipes, such as installed at the inlet and outlet of the product.

In the cleanable pipeline system, the choice of cleaning valve is particularly important. Such valves must be adapted to the respective application. In fact, the role of the valve is to simply open, open or close the pipeline, and only a switch can change the flow direction of the product or the operation line of the pipeline cleaner. In addition to the general requirements, the valve must also ensure sealing, leakage, smooth operation, accuracy and the cleanability of the valve, such as:

1)Same as the inner diameter of the pipe.

2) The flange can be aligned.

3) The blockage can be accurately adjusted when rotating and switching.

4) Guide the valve stem toward the tap.

The important criteria for selecting pig valves are cleanliness and no pits (no dead corners)

The purge valve must be matched to the type of purge valve used (ball, cup, seal, integrally cast). The exact installation of the probe, pressure leakage and vent product characteristics will affect the choice of purge valve, making the valve application idle. If the product is prone to hardening, viscosity and wear. Advantages Standard commercial pipeline valves can be modified in a certain way for special applications.

2. Classification of cleaning valves.

In order to meet the requirements of pipeline cleaning systems, manufacturers have developed their own valve series. In principle, pipeline cleaning valves can be divided into standard valves and special valves.

Standard valves:

1) Pipe cleaning station

2) Tap

3) Ball receiving and sending cylinder.

4) Switch

Special valves:

1) Two cleanable pipes intersect.

2) Ball receiving station used by the transfer arm.

3) Ball receiving station for loading valve.

4) Manifold

5) Valves used in sanitary industries.