● The low-pressure cavity pressure-conducting hole is built-in to avoid bumps during on-site

installation. 

● Extemal high pressure end pressure gauge with lock valve with manual closing function, it can be achieved by turning with a universal hexagon wrench.

● The balance diaphragm and spring are both built-in designs, making the valve more exquisite

and reliable.

● The target pressure difference value can be set by manual wheel, and the operation is simpler

and more intuitive.