Maintenance and commissioning of pneumatic butterfly valve
1. The inspection and maintenance plan of the cylinder is to clean the cylinder surface and add oil to the cylinder shaft circlip at ordinary times, and open the cylinder end cover regularly every 6 months to check whether there are sundries and moisture in the cylinder and whether the lubricating grease is in good condition. If the grease is insufficient or dry, the cylinder shall be disassembled for comprehensive maintenance and cleaning before adding grease.

The outer body of the steel lined Teflon compensator is a stainless steel metal compensator, which can withstand various concentrations of acid, alkali and salt. It also has the pressure of the stainless steel compensator, and is not afraid of collision. Available: DN25-1600mm Continuous fatigue life: 5000 times Pressure rating: PN0.6, 1.0, 1.6MPa Operating temperature: ≤ 200 ℃ ② type spray Teflon compensator Rubber ball compensator can provide DN25-DN3000mm wave number unlimited, Length ≤ 3000mm Fatigue times: ≥ 10000 times Pressure rating: PN0.25-2.5MPa Application temperature: ≤ 180 ℃ ③ Rubber ball compensator is generally manufactured according to the request of the user, which is relatively pressure resistant and temperature resistant.
The rectangular round corner tetrafluoro compensator for the flue gas duct of the power plant is a new type of flexible duct for the flue gas duct developed by referring to the American "CE" specification and international general products and separating the special conditions of power plants in China. This product is an important part of the large connection area of the power plant, metallurgy, cement, and petrochemical equipment systems, and the flue gas price guarantees the safe operation of the transmission pipeline Compared with similar products with single bevel, double bevel, bellows angle and low wave tangent point small ballpoint pen angle, the geometric nonlinear deformation caused by load and data nonlinear deformation show outstanding work and excellent quality. The domestic design institutes, engineering units and project owners have increasingly high recognition rate and have been widely applied.
1. The corners of the product form a rectangular section with large arc transition. The stress degree of the corner crossing section is reduced, and the dead angle of deformation and the overall average deformation of the product during online operation are eliminated, thus reducing the risk of regional high stress damage and extending the service life of the product.
2. Due to the variation of the compliance of the geometric shape, this product can work reliably in a benign force system under the action of external tensile stress, compressive stress and alternating stress, avoiding some stress risk areas. When working in the atmosphere containing H2SO, CO and H2 smoke, it effectively improves the deterioration trend of stress corrosion cracking (SEE) and corrosion fatigue cracking (CFF), without affecting the service life, The allowable number of thermal cycles of the product is improved.
3. This product reduces the thrust of low piping system under the condition of not losing stability as a whole and adhering to the fundamental working stiffness, which improves the thermal compensation ability of the product and reduces the cost of flexible parts in pipeline establishment.
4. When welding the bellows, the weld can be far away from the arc tangent point. When the length of a single side of a rectangle is less than 2M, the weld can be reduced by one. The amount of misalignment of the weld seam is greatly reduced. The error of the contour of the bellows section and the length of the corrugated envelope at any position of the product is very small. The corrugated forming and stretch bending forming are full of sophistication. It is consistent with the theoretical criterion of good maximum fatigue life of bellows.
5. The arc steel plate at the corner of the product is welded and reinforced. The interface is made of channel steel, which strengthens the structural rigidity of the product. The overall product line is fluent and the appearance is bright.