To make the overall clarity in the operational and design features of the use of valves is proposed to be classified by the following parameters:
1) by way of the overlap of the flow;
2) on the application;
3) depending on operating environment and its parameters;
4) the material base parts;
5) the method of administration;
6) on the functional purpose;
7) on a way of accession to the pipeline;
The largest diameter of the port area;
9) The largest conditional pressure.
Characterized by PEX fitting performance and structural properties. Performance specifications define the scope of reinforcement, construction – design features that affect the method of management, installation, maintenance and repair.
By operating characteristics include:
class armature
type of product;
material of main parts;
type of drive.
Construction characteristics of the valve are:
face length;
Building height;
type of the connections;
a way of accession to the pipeline;
type sealing rings.
By way of the overlap of the flow valves are categorized as follows:
bolt – the bolt in the form of disk, plate or wedge, makes reciprocating motion along its plane perpendicular to the axis of flow. The principal feature of gate valves is that when they are closing the locking element does not overcome the efforts of the pressure medium, as it moves across the flow. In the gate valve when closing is necessary to overcome friction only. Therefore, valves may be used for the largest passageways and working pressures.