Overview
The Dt673H pneumatic clamp elastic metal seal butterfly valve features a "U" shaped stainless steel seal ring, which is a precision elastic seal in three dimensional eccentric contact with the polished butterfly plate. It solves the problem that the sealing surface of the traditional eccentric butterfly valve is still in sliding contact friction when opening and closing 0° ~ 10°, and realizes the effect that the sealing surface is separated when the butterfly plate is opened, and the contact is sealed when the contact is closed, so as to extend the service life and achieve the best sealing performance. Therefore, it is widely used in the medium temperature ≤550ºC metallurgy, electric power, petroleum, chemical industry, air, gas, combustible gas and water supply and drainage and other corrosive media pipelines, is the best device to adjust the flow and cut off the fluid.
Features
1, the butterfly valve structure is simple, compact, light weight, easy to install and disassemble, convenient maintenance;
2, the butterfly valve adopts stainless steel "U" type sealing ring, has a certain elasticity no matter in the case of high temperature, low temperature, it and the butterfly plate have excellent sealing;
3, the butterfly valve's three-dimensional eccentricity, after strict calculation, "U" type sealing ring and butterfly plate almost no friction, long service life, and has the function of the tighter close;
4, the sealing surface of the butterfly plate adopts surfacing welding cobalt-based cemented carbide, the sealing surface is wear-resistant, long service life;
5, the butterfly valve structure is unique, "switch" only need to turn the stem 90° to complete. The operation is flexible, convenient, labor-saving, not affected by the medium pressure, reliable sealing performance;
High temperature resistance, low temperature resistance, corrosion resistance.
Standard
design standard :GB/T12238-1989
flange connection size :
GB/ T9113.1-2000; GB/T9113.2-2000
GB/T9115.1-2000; GB/T9115.2-2000
Structure length :GB/T12221-1989
Pressure test :GB/T13927-1992; JB/T9092-1999
Executive mechanism
Using the new series GT type pneumatic actuator, there are double acting and single acting (spring return), gear transmission, reliable; Large diameter valve adopts series AW type pneumatic actuator fork transmission, reasonable structure, large output torque, double acting and single acting
1, gear type double piston, output torque is large, small volume.
2, cylinder selection of aluminum gold material, light weight, beautiful appearance.
3. Manual operation mechanism can be installed at the top and bottom.
4, rack type connection can adjust the opening Angle, rated flow.
5, the actuator can choose live signal feedback indication and various accessories to achieve automatic operation.
6. IS05211 standard connection provides convenience for the installation and replacement of the product.
7, both ends of the adjustable screw can make the standard product in 0° and 90° have a ±4° adjustable range. Ensure the synchronization accuracy with the valve.
The options of
accessories
according to different control and requirements can choose the following accessories:
cut off type accessories: single electronically controlled solenoid valve, double electronically controlled solenoid valve, limit switch return signal.
Regulator accessories: electrical positioner, pneumatic positioner, electrical converter.
Air source processing accessories: air filter pressure reducing valve, air source processing triplet.
Manual mechanism: HVSD manual operation mechanism |
Main technical parametersNominal diameterDN (mm)50 to 1200Nominal pressurePN (MPa)0.61.01.62.54.0Test pressureStrength test0.91.52.43.756.0Seal test0.661.11.762.754.4Gas seal test0.60.60.60.60.6Applicable mediaWater, steam, oil, acid corrosion, etc.Applicable temperatureCarbon steel :-29ºC ~ 600ºC Stainless steel -40ºC ~ 600ºC |
Material of main partsPart nameMaterialsBodyCast iron, cast steel, stainless steel, chrome-molybdenum steel, alloy steelsphenoidCast steel, alloy steel (hard chrome plated), stainless steel, chrome molybdenum steelSealing ringStainless steel, polyolactone, anti-wear materialValve stem2Cr13, 1Cr13 stainless steel, chrome molybdenum steelStuffingFlexible graphite |
