Oil and Gas Industry Power Generation Oxygen Diaphragm Valve Valves

Pneumatic diaphragm valve is driven by compressed air to pneumatic actuator, the movement of the actuator is transmitted to the diaphragm through the connecting parts. The diaphragm moves upward or downward under the action of air pressure, thus opening or closing the valve passage. When the diaphragm leaves the valve seat, fluid can pass through the valve; when the diaphragm is pressed against the valve seat, the valve closes, preventing fluid flow. The diaphragm of this type of valve separates

It mainly consists of valve body, diaphragm, bonnet, pneumatic actuator (e.g. cylinder, piston, etc.), valve stem and connecting parts. The valve body is the main part of the fluid passage, the diaphragm is used to isolate the fluid and the actuator and control the fluid on and off, the bonnet is used to fix the diaphragm and connect the actuator, the pneumatic actuator provides the power to drive the diaphragm action, and the valve stem transmits the power from the actuator to the diaphragm.

The installation location should be easy to operate and maintain, and there should be enough space around. The valve should be installed vertically, so as to ensure that the diaphragm works properly under gravity, and avoid situations such as uneven force on the diaphragm due to tilting. During installation, attention should be paid to the connection between the pipeline and the valve to ensure a tight connection and prevent leakage. At the same time, the valve should be installed correctly in a

Before installation, check whether the model and specification of the valve meet the requirements, including calibre and pressure level. Check whether the diaphragm is intact, without cracks or perforations. Also check whether the action of the pneumatic actuator is flexible, there is no stagnation phenomenon, check whether the seals of the connection parts are complete and in good condition.

The valve opening can be controlled by adjusting the air pressure signal of the pneumatic actuator. In the automatic control system, according to the process requirements to set the control signal (such as 4 - 20mA current signal or 3 - 15 psi air pressure signal, etc.) and the valve opening the corresponding relationship, the controller output signal to drive the pneumatic actuator, so that the valve to achieve the desired opening. The valve opening can also be changed by manual adjustment devi