Half-ball valve replacement, valve, butterfly valve of

Henan Black Horse Industry Co., Ltd. developed its own production to fill the blank of domestic varieties of innovative valve products - BQ dual eccentric half-ball, is carefully weighed ball valve, butterfly valve, gate valve and other advantages and disadvantages of the premise learn from Germany developed similar products made of all the innovative products, conclusions that: ... in some ways better than the use of performance gate, globe valves and ball valves and other similar products, can be used to promote the oil, chemical , power and metallurgical industries [... See the original Ministry of Chemical Industry Science and technology achievement appraisal certificate], the core technology is a national initiative, it is a unique design, novel structure, has been five patents. Products on the market five years, subject to customer approval, ordering the range continues to expand, indeed, on different occasions replaced the ball valve, butterfly valve, gate valve and other valves, what better than to where it? First, the structure of the eccentric - tight wedge principle. Valve body and spool rotation center (ie, the stem axis) and the spool of the geometric center of the spherical sealing a radial size of the bias, but also with the valve seat sealing surface in the body there is a bias on the channel axis dimensions, seal the metal - metal contact with the external force, relying on two eccentric valve closure to achieve self-locking, eccentric makes a reasonable matching self-locking angle is less than the friction angle, self-locking angle selected is too small to close easily, especially on difficult, large selection of angles , although the opening force is small, but the rapid increase in torque off, test bed trial, to determine the two critical eccentricity with a rational, reliable, self-locking performance to ensure tight sealing. This is a semi-ball's core technology, from the structural principle by creating the means to achieve the best seal, the ball valve, butterfly valve, gate valve, globe valve, there less.
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Second, can easily achieve and maintain long-term zero leakage. Valve and valve seat seal is spherical line contact, achieved by eccentric locking, sealing in the open and close the whole process is almost no contact, only in the opening and closing moments, and the gates will close contact with zero leakage, ensure that the static and dynamic seals no leakage at the point. Seat on the scale or other deposits, valve seat in contact with the process, with a strong ability to remove scaling. The valve sealing surface of the reciprocating motion of the frequent opening and closing, mixed medium scale precipitation in the lower body cavity, the pressure valve is achieved entirely on seals, seat capacity on the scale-free clean-up, the two packing The often repeated wear and tear likely to cause valve, the valve leakage within the vent. Valve seat seals rely on long-term squeeze on the sphere, it definitely wear faster than the half-ball valve, butterfly valve seal is a rubber as an intermediary, it is higher than half-ball valve, ball valve, gate valve sealing performance falls far short of hard metal. Half-ball long-term use, the seat will also produce small quantities of wear and tear, it can be adjusted to continue to use, stem and stem packing just in the process of opening and closing rotation 90 °, there is evidence of leakage, and then compress the packing gland bolt a little, no leakage at the packing can be achieved, while the other is a small drain valve is still reluctant to use, great for valve leakage. Aluminum Corporation of China Guangxi Branch (working medium: red mud fluid, strong alkali soluble) the use of the report that "... the valve operation (opening and closing) easy and convenient, easy to maintain airtight performance, with long life compared to ordinary gate valve, ... from July 2001 is still in use (who has worked nearly three years - editor) did not find any mechanical problems and leaks from the labor intensity, energy efficiency and leakage are very popular in . " Third, the operation is extremely lightweight. Half-ball valve opening and closing of the whole process, seal almost idling in the undamped state, from the moment of force only in the open and close or pressed, and stem simply rotated by 90 ° light and fast, of course, easy operation. Ball is in the process of opening and closing both ends of the valve seat in the hold of power by the next operation, it is larger than the half-ball valve opening and closing torque, the greater the nominal diameter of the more obvious difference between the opening and closing torque, valve opening and closing is to overcome the rubber the deformation to achieve greater torque. The gate valve, globe valve operation for a long time and strenuous. Zhengzhou Gas Company in the use of the report, said: "Since 99 years, has your company purchased its production from the 'dark horse' brand and a half ball noisy ... have not found quality problems, ..., the company's products in the structure more than the average new valve, ball valve in the operation of lighter than normal ... "; the use of Shanxi Branch of China Aluminum Industry Report, said:" ... from the use of your organization products BQ dual eccentric Since the half-ball valve, butterfly valve used with the original, gate valve, Y-valve, switch to put in place, light and flexible, easy to use, reduce labor intensity, welcomed by the workers ... "! Fourth, long service life. Are bi-metal sealing, surfacing on the different uses of the mother alloy, with a special heat treatment, mechanical properties and its physical and chemical indicators of the best, to meet different conditions (strong wear, erosion rapid, severe corrosion and other media) the need, the hardness is slightly lower than the valve seat valve, different materials and different heat treatment process, the hardness of sealing required up to HRC53 or more, but also resistant to high temperature 560 ℃. Practice has proved that its anti-corrosion and anti-sealing stainless steel bite capacity is six times the valves open and close on a million times without failure, extended service life. Wuhan Iron and Steel Company in the use of the report, said: "bituminous coal injection in the first phase purchase your hand, electric, pneumatic and a half ball, no fouling phenomenon during use, switching flexibility, good sealing performance, which is in charge of line with half-ball with the introduction of foreign equipment, better facilities, and various types of valve price is only about the price of similar foreign equipment 15-20%, the Wuhan Iron and bituminous coal blowing a save investment projects, with nearly three years ... ... , in good condition, cost savings, reduced equipment failures and reduce the labor intensity, leadership and management by the Iron Works personnel alike. " Another example: Beijing Shougang in the use of the report, said: "I plant coal handling system in the new five-milling test installation of the 'dark horse' brand and a half ball valve used to replace the original has been more than 10 months, show that the use of products with open and flexible, sealing, and pressure fluctuations of the wind source, the use of stable characteristics of the winter has a strong adaptability, ... more adverse working conditions for the use of factory production due to requirements process characteristics required once every 20 minutes, switch, so six months of the trial period has been open and close ten thousand times, does not appear abnormal, the system can meet the coal requirements .... "

five, and wide application. Our half-breed multi-series ball valve is widely used in non-ferrous smelting, natural gas, steel and coal dust injection, power transmission and slag, toxic gases (hydrogen sulfide, phosgene, etc.) and oil (heavy oil, crude oil, residual oil etc.) refining and distribution. The reason it wide application, mainly because of the different seal pair were surfacing alloy, making bi-metal, valve body, stem and other major parts are required for material to meet different conditions, constitute a variety of products the company series.