The structural features of the ventilation butterfly valve: 1, the ventilation butterfly valve adopts the new structure welded by the mid-line type disc and the short structural steel plate, which is compact and light in weight, easy to install, has small flow resistance, large flow capacity and easy operation. 2 without connecting rod, bolts, etc., reliable, long service life. Can be installed at multiple locations, not affected by the flow of medium Ventilation Butterfly valve Widely used in building materials, metallurgy, mining, electricity and other production processes Medium temperature ≤ 300 ℃ Nominal pressure of 0.1Mpa Pipelines, use: The butterfly valve is a non-closed Butterfly valve. To connect, open or close the media volume. The working principle of the ventilation butterfly valve: The ventilation butterfly valve is driven by the motor to drive the actuator, so that the disc rotates freely within 90 ° to achieve the purpose of opening and closing or regulating the flow of the medium. Lined rubber butterfly valve as a system used to achieve on-off and flow control of the pipeline components, has been in the petroleum, chemical, metallurgical, hydropower and many other fields have been very widely used. Known butterfly valve technology, the use of more sealed form the seal structure, seal information for the rubber, PTFE and so on. Due to the structural characteristics of the restrictions, do not meet the high temperature, high pressure and corrosion-resistant, anti-wear and other industries. A more advanced butterfly valve is a three eccentric metal seal butterfly valve, the valve body and valve seat for the joint member, the outer surface of the valve seat sealing temperature welding, corrosion resistant alloy material. Multi-layer soft stacked ring fixed to the valve plate, the butterfly valve compared with radical butterfly valve has high temperature, light operation, opening and closing without friction, closing with the torque of the transmission mechanism to compensate for increased sealing, improved butterfly valve The sealing performance and extend the service life of the advantages. Ventilation butterfly valve construction, installation points: 1 device location, height, direction of import and export must meet the design requirements, pay attention to the direction of flow of the medium should be consistent with the direction of the arrow marked body, the connection should be solid and tight. 2 valve device before the appearance of the inspection, the valve nameplate should be consistent with existing national norms "General Valve Marking" GB12220 regulations. For the working pressure is greater than 1.0MPa and the main pipe to play the role of cut-off valve, the device should be carried out before the intensity and tightness test, qualified after the standard use. Strength test, the test pressure of 1.5 times the nominal pressure, the duration of not less than 5min valve housing, packing should be no leakage as qualified. Tightness test, the test pressure of 1.1 times the nominal pressure; test continued for a long time in line with the requirements of GB50243 Ventilation butterfly valve according to the working pressure classification: 1 vacuum butterfly valve working pressure is lower than the standard reactor atmospheric calendar butterfly valve. 2 low pressure butterfly valve. Nominal pressure PN <1.6MPa butterfly valve. 3 medium pressure butterfly valve. Nominal pressure PN 2.5 - 6.4MPa butterfly valve. 4 high-pressure butterfly valve. Nominal pressure PN is 100--80.0MPa butterfly valve. 5 ultra-high pressure butterfly valve. Nominal pressure PN> 100MPa butterfly valve. Ventilation butterfly valve by temperature classification: 1 high temperature butterfly valve. T> 450 ℃ butterfly valve 2 temperature valve. 120C <t <450C butterfly valve 3 room temperature. A 40C <t 4 low temperature butterfly valve. A 100 <t <a 40C butterfly valve ultra-low temperature butterfly valve. t <a 100C butterfly valve ventilation butterfly valve by connection type: 1 pair of butterfly valve 2 flange butterfly valve 3 ear butterfly valve 4 welding butterfly valve ventilation butterfly valve according to the structure classification: 1 center seal butterfly valve 2 single eccentric seal coal valve 3 double eccentric Sealing butterfly valve 4 three eccentric seal 跺 valve ventilation butterfly valve sealing material classification: 1 soft seal butterfly valve. 1 sealed by the non-metallic soft materials on the non-metallic soft materials.
Room Door
All aluminum alloy material has strong plasticity and never rusts. Fluorocarbon baking powder is delicate, smooth, and long-lasting without fading. The product is intelligently matched with various smart devices, making it a minimalist, luxurious, and youthful fashion design style.
Advantages of aluminum doors:
Strong and durable: Aluminum alloy has high strength and hardness, can withstand the collision and wear in daily use, and has a long service life.
Corrosion resistance: Aluminum will naturally form an oxide film in the air. This oxide film can effectively prevent aluminum from further oxidation and corrosion, making it stable and not easily damaged in environments such as moisture, acid and alkali.
Good fire resistance: Aluminum alloy has good high temperature resistance, which can play a role in fire prevention to a certain extent and increase the safety of living.
Good sealing: Aluminum doors can be equipped with high-quality sealing strips to effectively improve the sealing performance of the door, and have significant sound insulation, heat insulation, and dustproof effects.
Various styles: Through different surface treatment processes and designs, a variety of colors and styles can be achieved to meet different decoration styles and personal preferences.
Environmental protection: Aluminum is a recyclable material and conforms to the concept of environmental protection.
room door ,Cast aluminum doors, secure metal doors
Foshan Nanhai Jinfancheng Metal Building Materials Products Co., Ltd. , https://www.landrandoor.com
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