(1) First, the structure of radial seal between the support ring and the valve body in Figure 1 is improved, and the O-ring sealing structure is canceled. The step structure is directly processed on the support ring in Figure 2, so that the seal chamber is formed between the support ring and the valve body. The seal ring with high temperature resistant flexible graphite material is installed in the seal chamber, A gasket with conical section is added behind the sealing ring, and a screw plug with special structure is installed behind the gasket. In this way, the screw plug transmits the force to the gasket by screwing the screw plug. The conical section of the gasket will squeeze the sealing ring, and the sealing ring will deform, making it stick to the support ring and valve body inside and outside in the radial direction, so that the thermal insulation pneumatic ball valve can obtain a high-temperature sealing structure in the radial direction. At the same time, By screwing the screw plug, a pre tight sealing force is generated between the ball and the valve seat to make it sealed.?

What are the characteristics of pneumatic butterfly valve data?
Connectors at both ends: connectors mainly include threaded connection, flange connection, quick connector connection. Pneumatic butterfly valve has three major functions: reducing the device stress of the pipeline, compensating the displacement of the rated position of the pipeline, and absorbing the vibration of the pipeline system.
The stainless steel mesh sleeve is the main pressure bearing part of the metal braided hose device in the pressure pipeline, and also plays a maintenance role for the pneumatic butterfly valve. According to the pressure in the pipeline and the application site, one or more layers of stainless steel wires or steel strips can be selected to be woven according to certain parameters to form a high-pressure pneumatic butterfly valve, The pressure range of the metal braided hose consumed by our company is generally PN0.6-32.0MPa, up to 42.0MPa. Stainless steel mesh cover mainly includes steel mesh cover and steel mesh cover.
Features of corrugated pneumatic butterfly valve:
1. Maximum allowable shrinkage per wave recommended: full height △ α= ± 24mm half height △ α= ±12mm。
2. Ash baffle: it can not be used for air duct or pipe with little dust, and it should be used for flue with much dust.
3. In order to reduce the number of corrugated sections of bellows, 50% cold drawing shall be considered.
4. The standard half height corrugated pneumatic butterfly valve is applicable to places with a sectional area of less than 4.6 square meters and the overall dimensions of the flue and air duct where one side is less than 1.5 m but more than 0.6 mm. The standard full height corrugated pneumatic butterfly valve is applicable to all flue ducts.
The corrugated pneumatic butterfly valve has many characteristics, such as good flexibility, fatigue resistance, high pressure resistance, temperature resistance, corrosion resistance, etc. Its service life is much longer than other hoses (rubber and plastic hoses), so it has higher comprehensive economic benefits. With the development of modern industry, your demand for high temperature and high pressure resistant corrugated hoses is growing.