Selection Code for Valves

Selection Code for Valves

In the mud pump, the mud pump valve is the control element, and its main function is to isolate the equipment and pipeline system, regulate the flow, prevent backflow, adjust and discharge pressure.

The valve can be used to control the flow of air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It is very important to choose the right type of mud pump valve in the mud pump system, so it is also very important to know the type and characteristics of the valve. 


1. Valve can be divided into two categories:

1) Automatic valve

The valve that can operate by itself depends on the ability of medium (liquid, gas). Such as: check valve, safety valve, control valve, regulating valve, pressure reducing valve.

2) Drive valve

The valve is operated manually, electrically, hydraulically and pneumatically. Such as: gate valve, globe valve, throttle valve, butterfly valve, ball valve, plug valve.

2. Two characteristics of the valve

1) Operational characteristic

It determines the main performance and scope of use of the valve, belonging to the valve service characteristics are:

The categories of the valve (closed-circuit valve, regulating valve, safety valve, etc.); The product type (gate valve, stop valve, butterfly valve, ball valve, etc.) ;

Material of main parts of valve (valve body, cover, stem, disc and sealing surface); Valve transmission mode, etc.

2) Structural characteristics

It determines some structural characteristics of valve installation, repair and maintenance, belonging to the structural characteristics are:

The structural length and overall height of the valve, and the connection form with the pipeline (flange connection, thread connection, clamp connection, external thread connection, welding end connection, etc.);

The sealing surface form (insert ring, thread ring, surfacing welding, spray welding, and valve body);

Valve stem structure form (rotating rod, lifting rod, etc.).