D943WType 310S, 2520 bidirectional stainless steel electric high-temperature butterfly valve adopts a U-shaped stainless steel sealing ring, the precise elastic sealing ring and the polished butterfly plate are in three-dimensional eccentric contact. It solves the problem that the sealing surface of traditional eccentric butterfly valve is still in sliding contact friction at the moment of opening and closing from 0 ° to 10 ° and realizes the effect that the sealing surface of butterfly plate is separated at the moment of opening and the sealing effect is that the contact is closed, so as to prolong the service life and improve the sealing performance. Therefore, it is widely used in the pipeline of corrosive medium such as metallurgy, electric power, petroleum, chemical industry, air, gas, combustible gas and water supply and drainage with medium temperature ≤ 1200 ℃. It is a good Zui device for regulating flow and cutting off fluid.

1. The butterfly valve has the advantages of simple structure, compact structure, light weight, easy installation, disassembly and maintenance;
2. The butterfly valve has excellent sealing performance with stainless steel in low temperature;
3. After strict calculation of the three-dimensional eccentricity of the butterfly valve, the U-shaped seal ring has almost no friction with the butterfly plate, and has a long service life, and has the function of closing more tightly;
4. The sealing surface of butterfly plate adopts hardfacing cobalt based cemented carbide, which is wear-resistant and has long service life;
5. The butterfly valve has a unique structure, and the "on-off" can be completed only by turning the valve stem 90 degrees. The operation is flexible, convenient, labor-saving, not affected by the medium pressure, and the sealing performance is reliable;
6. High temperature, low temperature and corrosion resistance
7. 310S stainless steel is austenitic chromium nickel stainless steel, equivalent to China's 0Cr25Ni20, with good oxidation resistance and corrosion resistance. Because of the high percentage of chromium and nickel, it has much better creep strength, can work continuously at high temperature, and has good high temperature resistance. When the temperature exceeds 800, it begins to soften, and the allowable stress begins to decrease continuously. Zui has a high service temperature of 1200 ℃. Because of the high content of nickel (Ni) and chromium (CR), they have good oxidation resistance, corrosion resistance, acid and alkali resistance, and high temperature resistance. High temperature resistant steel pipes are specially used in the manufacture of electric furnace tubes. After the carbon content in austenitic stainless steel is increased, the strength is improved due to its solution strengthening effect. The chemical composition characteristics of austenitic stainless steel are based on chromium and nickel, adding molybdenum, tungsten, niobium and titanium, Because of its face centered cubic structure, it has high strength and creep strength at high temperature.

D943WType 310S, 2520jn bidirectional stainless steel electric high temperature butterfly valve main parts materials

Part name	Material Science
valve body	310S
Disc	310S
Valve shaft	310S
seal ring	Stainless steel ring
Packing 304 + flexible graphite

 

Design standard: GB / t12238-1989
Flange connection dimensions: GB / t9113.1-2000; GB / t9113.2-2000; GB / t9115.1-2000; GB / t9115.2-2000
Structural length: GB / t12221-1989
Pressure test: GB / t13927-1992; JB / t9092-1999

Type: ZY series features:
1. Powerful function: intelligent, adjustable and switch type.
2. Small size: its volume is only about 35% of that of similar products.
3. Easy to use: single phase power supply, simple wiring; unique ball shaped protruding structure, making observation more convenient; no oil, no spot check, waterproof and rust proof, installation at any angle.
4. The protection device has double limit, overheat protection and overload protection. The whole travel time is 15 seconds, 30 seconds, 45 seconds and 60 seconds. And with manual function.
5. Intelligent numerical control: the built-in module adopts advanced single-chip computer and intelligent control software to directly receive the standard signal (4-20mA DC / 1-5vdc) output from computer or industrial instruments to realize intelligent control and precise positioning of valve opening.
3810 series or Na series electronic angular travel actuator can be selected. PSQ series or dyr series can also be selected. 380VAC electric actuator is generally used for valves with diameter ≥ DN 300. Domestic brands such as Ruiji, Aotuoke, Yangzhou electric power, tianertong, Lanling, etc.; foreign brands include British rotok, French Bernard, Germany Ouma, German Siemens, etc.

1. Before installation, check whether the specification, pressure, temperature and corrosion resistance of butterfly valve meet the use requirements. Check whether the parts are damaged or loose.
2. The butterfly valve can be installed on the pipeline at any angle and should be closed; when welding the pipe flange, the valve sealing port should be blocked with a plate to prevent particles and sundries from damaging the sealing surface. After welding, take down the valve, clean the valve sealing surface and pipe cavity, and then install the fixed valve.
3. Please pay attention to the pressure bearing direction when the valve is closed.
4. Before installation, the sealing surface (sealing surface at both ends, sealing surface of butterfly plate and sealing surface of valve seat) shall be thoroughly cleaned to remove dust and dirt.
5. Before installation, the butterfly valve should be air tested, and the opening and closing position should be flexible, and the opening and closing position should be consistent with the position indicated by the pointer.
6. Manual operation, clockwise is off, counter clockwise is on, pointer indication is in place, it is not allowed to open and close the valve with additional force.
7. During the pressure test of the valve, it is not allowed to use single flange for installation and pressure test, but double flange installation and pressure test must be adopted. The test pressure shall comply with GB / T13927-92.
8. The bolts shall be tightened symmetrically and alternately instead of separately.
9. The limit screw has been adjusted before delivery, so it is not allowed to adjust it easily. If the configuration of driving device is electric or pneumatic, please refer to the manual of supporting drive device.
10. When the electric butterfly valve leaves the factory, the opening and closing stroke of the control mechanism has been adjusted. In order to prevent the wrong direction when the power supply is connected, the user should first manually open it to the half open position before connecting the power for the first time, and then press the inching switch to check that the direction of the indicator wheel is consistent with the opening direction of the valve.

11. If the valve is found to be open and closed abnormally, the cause should be found out for repair and elimination, so as to prevent the valve from being damaged due to opening and closing by means of applying force。