The main body of the valve used in gas, crude oil and refined oil pipeline transportation should not be less than 30 years old and have double sealing, fireproof and antistatic functions. When the valve chamber is abnormally pressurized, it has the function of automatic pressure relief and auxiliary sealing Structure and double blocking sewage structure. Ball valves are used to transport natural gas in the pipeline, flat gate valve used to transport crude oil and refined oil pipeline. The design and manufacturing standards for ball valves for natural gas are API6D "Pipeline Valves", ANSI B3118 "Natural Gas Transmission and Distribution Piping Systems," ANSI B16134 "Flanges, Threaded and Welded Valves," ANSI B16110 "Valve Structure Lengths", GB2237 "Flanged and butt welded steel ball valve", JB / T 7745 "pipeline ball valve", GB 12224 "general requirements of steel valves" and GB 12221 "flanged metal valve structure length" and other standards. When the ball valve body is cast, the material is ASTM A216 WCB or WCC. Body forgings, the material is ASTM A105. Ball valve ball material 2Cr13 or ASTM A105, which ball ball ball pounds of nickel-plated, nickel coating thickness of 30 ~ 75μm, GB ball valve ball is hard chrome plated. Stem and shaft materials are preferentially supplied with 1040 medium carbon anti-friction bearing steel or ANSI 302 stainless steel in 2Cr13 (ASTM A276 420) or ASTM A866-1994. When the working pressure is greater than 1010MPa, the choice of forged steel ball valve, in which the body, ball, stem and the shaft are blank forgings. The main pipelines for conveying natural gas are all channels, so that they can be cleaned by the sweeper. When the valve is closed, the medium that stays in the valve cavity will compress the inlet valve seat and the valve seat when the cavity pressure is overpressurized because of the increase of the ambient temperature, etc. The valve seat will be compressed. The spring, so that its pressure relief. Seat sealing surface inlaid with metal seat 1 ~ 115 mm above the PTFE soft seal seat, the seat is tapered, with the ball to form a reliable line seal. When the fire PTFE burns, the molded metal seat is pushed by the strong spring and forms a "hard seal" with the ball to meet the fire prevention requirements.
Mechanical Concealed Cistern
The mechanical concealed cistern is a common bathroom fixture that stores flush water and controls flushing. It is usually installed in the wall, and there is only a button on the outside to start the flush. Its design makes the water tank no longer occupy the toilet space, thus providing more free space and beautiful appearance.
Space-saving: The design of the mechanical hidden water tank allows the water tank to be installed inside the wall, saving valuable bathroom space, providing more free space and a beautiful appearance.
Beautiful: The design of the hidden water tank makes it no longer stand in the bathroom like the traditional surface-mounted water tank, thus improving the overall aesthetics of the bathroom.
Water saving: The mechanical hidden water tank can precisely control the water volume when flushing, avoiding excessive consumption of water resources, thereby reducing water usage and saving water bills.
Long service life: Compared with the traditional surface-mounted water tank, the mechanical hidden water tank has a longer service life and lower maintenance costs because it is more concealed and less susceptible to external factors.
More hygienic: The traditional surface-mounted water tank needs to be cleaned frequently, and the scale and sundries hidden inside the water tank are not easy to be polluted by the outside world, so it is more hygienic.
Mechanical Concealed Cistern, Concealed Flushing Cistern, Toilet Flush Tank, Build In Toilet Cistern
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