Four way Ball Valve

Function

Four–way ball valve is also called multi–way water service rotary valve in power station, and air reversing change over valve in petrochemicals system. They are applicable for circulating system of liquid, gas, dust, slurry and medium containing solid particles. For example, the forward and reverse circulation water supply system of unit cooler in power station. The conventional piping for forward and reverse circulating water supply has the defects of large occupation, high cost, complicated operation (to operate four valves for each changeover). For forward water supply, valve 1 and 3 to be opened and valve 2 and 4 to be closed; for reverse water supply, valve 2 and 4 to be opened and valve 1 and 3 to be closed. Use of four–way ball valve instead of the conventional piping and valve group can simplify operational procedures, lower the cost, facilitate the control and improve its asynchronism.

structural features

1. Designed for the specific process of forward and reverse water supply for power system coolers, with applicable and reliable functions;
2. The top mounted fixed ball four sided seat valve core structure has good sealing performance, resistance to sand particle wear, and long service life;
3. Electric and pneumatic operation (can be switched to manual operation if necessary);
4. Facilitate good information channels and operation interfaces between the control box and valves, as well as between the control box and the upper computer; And it can automatically switch between positive and negative water supply at a certain time interval according to the process requirements.

Control System

Four-way ball valve can be controlled on the scene or through the operating of the central system for a remote controlling. The function is as below:

One, switch

1.Power switch

2.Field control / Remote control change over switch

3.Manual circulation / Automatic circulation change over switch

Two, button

1.Forward water supply

2.Reverse water supply

3.Pause

Three, Indicator light

1.Power indicator

2.Forward water supply indicator

3.Reverse water supply indicator

4.Middle position pause indicator

5.Valve or electric fitting jammed over–moment indicator (flash and alarm)

Four, opening indicator

Five, communication with upper machine

Technique Standard

Form of Main Parts Materials

Main Outline and Connecting Flange Size