Electric Diaphragm Valve

Electric diaphragm valve is a special form of shut-off valve that first appeared in the 1920s. The opening and closing component is a diaphragm made of soft material, which separates the valve body cavity from the valve cover cavity and the driving components, hence it is called a diaphragm valve

The working principle of an electric diaphragm valve is as follows: the valve consists of a valve body, valve cover, valve stem, valve disc, diaphragm, electric device, and other driving parts. [4] The opening and closing of the valve is driven by the connecting shaft of the electric device, which drives the valve stem nut to move axially, thereby driving the valve disc to rise and fall. [4] In case of power failure or interruption, the valve can be opened and closed manually. [4] At this point, it is necessary to switch the manual electric switch handle to the manual position and control the valve's opening and closing by rotating the handwheel. [4] When it is necessary to restore electric operation, the switch handle must be turned back to the electric position.

Ordering Instructions

Name and model of regulating valve

Nominal pressure Mpa

Nominal diameter (mm)

Rated flow coefficient (Kv)

Inherent flow characteristics

medium name

Working temperature and range

Operation mode of the whole machine

Pressure set point and adjustment range

Valve body, valve internals, and packing materials

Attached attachments

Other special requirements