Float valve production is relatively simple, generally available pneumatic diaphragm control valve restructuring. Shown in Figure 3, which consists of film head, the middle connector of the spool valve body composed of three parts.

The main components will now be three parts to make a profile.

1, the first part of the film

The first part of the film force balance is the main variable valve body. It is on the film cover, flat diaphragm, the diaphragm up and down on the film platen cover and other component parts. Flat diaphragm to diaphragm membrane separating the two rooms up and down, the film room for the regulator output signal, the next film after the valve chamber pressure feedback for the film room. Membrane material is 3 mm thick only good oil resistance of nitrile rubber. The material of the upper and lower diaphragm plate 5 mm steel. Its role is to maintain the effective area of the diaphragm, and connected to the stem and the diaphragm is not leaking after fastening with screws.

2, the middle part of the connector of

The main body part connecting the central role of the membrane connecting head and body, floating valve after the pressure through the middle of the cylinder into the chamber under the membrane to balance the regulator output impedance signal. The middle cylinder by