2. Installation process of pneumatic ball valve
(1) Install the valve into the pipeline. The valve for handle drive can be installed at any position on the pipeline. However, the manual pneumatic ball valve with gearbox and the pneumatic pneumatic ball valve with pneumatic driver are installed vertically, that is, they are installed on the horizontal pipeline, and the driving device is above the pipeline.
(2) The sealing gasket shall be installed on the connecting pipe shoe between the valve flange and the pipeline flange according to the design requirements.
(3) The bolts on the flange shall be symmetrically tightened one by one and evenly.
(4) Pneumatic actuators are used to connect pneumatic pipelines.

Technical standard of non-metallic compensator and comprehensive performance test of non-metallic compensator
Description of non-metallic compensator product performance
a. Product characteristics: non-metallic contraction joint is also called non-metallic compensator, which is characterized by multi-dimensional compensation and large compensation amount; No reverse thrust can simplify the design; Strong ability to isolate vibration, absorb sound and reduce noise; High temperature resistance, corrosion resistance, excellent sealing performance; Reasonable structure, light weight, easy device maintenance, etc.
b. Quality assurance system: the whole process of product design and consumption of our company strictly controls the production and quality according to ISO9001 quality management system and enterprise standard specifications.
c. Product composition: non-metallic contraction joints usually include non-metallic expansion joints (adhesive tape), metal structural parts (metal parts such as deflector, pressure plate, etc.), dust-proof layer and thermal insulation layer (see product samples), which are designed and manufactured as non-standard parts according to their detailed application requirements.
d. Compensation ability. The design range of compensation amount of our company's products is: axial - 180 -+200mm, radial ± 80mm.
e. Non metallic expansion joint: it is an important flexible element of the non-metallic expansion joint. It mainly provides compensation, vibration isolation, sealing and other functions of the contraction joint. Its quality directly affects the life of the contraction joint. According to the application request, the non-metallic expansion joint shall select the appropriate base material, the appropriate skeleton information, design the advanced rubber formula, the reasonable adhesive fabric structure, and be manufactured with scientific technology. The adhesive tape has sufficient physical and mechanical properties (strength, deformation and air tightness) to meet the requirements of pressure and movement, and has excellent resistance to medium corrosion, high temperature, aging and weather to meet the requirements of medium, temperature and life.
f. Diversion tube: the material, thickness and number of layers of the diversion tube in the metal structure are reasonably designed according to its function and application conditions. The reasonable setting of the diversion tube can better maintain the internal structure of the contraction joint from the damage of the medium; At the same time, the draft tube shall be properly positioned in the structure to ensure that the contraction joint has sufficient compensation.
g. Thermal insulation layer: the thermal insulation layer of high-temperature non-metallic compensator has a great impact on the performance of the compensator. The main composition and structure of this part are designed according to the temperature, composition and other parameters of the medium. Usually it has the function of dust prevention and heat insulation. When anti-corrosion is required, an anti-corrosion layer is added. The existence of this layer further maintains the non-metallic expansion joint. When our products are used, The surface temperature is generally controlled below 50 ℃, which reduces the impact on the ambient temperature and is conducive to the long-term use of outer non-metallic expansion joints.
h. Connection mode: the product can be connected with other equipment in two ways: welding or flange connection. When flange connection is provided, counter flange, connection bolt and other accessories are provided.
i. Service life: It can ensure that the service life of the product is not less than six years under normal operation conditions.
j. Others: The maximum operating temperature of non-metallic contraction joint reaches 1600 ℃ (boiler system of Tangshan Iron and Steel Group Co., Ltd.), which can meet other requirements such as reducing diameter and square conversion.