Ammonia valve design features: (1). Bellows liquid ammonia shut-off valve zero leakage seal: (1), main seal - bellows assembly / built-in design, no flushing, maintenance-free, reduce operating costs, long service life. (3), the internal limit device / increase the upper limit of the valve stem, the use of the protection valve is safe, effectively protect the elastic variable of the bellows, greatly improving the service life. (2) Bellows ammonia gas shut-off valve stem and bellows protection device: (1), anti-rotation block / prevent lateral torsion of the bellows to ensure the maximum service life of the bellows (2), packing sleeve: used to compact the packing, so that the sealing performance is more intact, increase the service life of the packing, maintenance-free; (III). Excellent processing and optimization design of the bellows for the bellows ammonia (1) Surfacing, grinding valve disc, valve seat: Surfacing hard alloy in valve disc and valve seat, after grinding, corrosion resistance, improve service life and ensure the reliability of internal seal; (2), hinged connection: the valve flap and the lower stem are hinged, mainly for the sealing and sealing of the sealing surface contact, so that the sealing performance is more reliable, ensuring no leakage (3), flow channel optimization: using the results of computer simulation demonstration, after optimization, the flow capacity of the valve of the same specification is increased by 10~50%, and the flow resistance coefficient is low. Yonglong ammonia station stop valve-ammonia valve_ammonia bellows stop valve_zero leakage long diameter bellows ammonia shut-off valve reliable sealing and superior energy in German quality technology: (1) The valve body adopts German coated sand casting technology, which greatly improves the surface finish and mechanical properties of the valve body, reduces the appearance of pores, trachoma and cracks, and enhances the tensile strength of the casting. (2), valve cone design: When the valve is closed, the conical sealing surface with “scraping effect†can automatically remove surface impurities, which can ensure reliable sealing and long service life of the valve disc. (3), so the bellows 100% passed the nitrogen test to ensure zero leakage, so the valves are tested according to the standard, the factory pass rate is 100%. (4), can provide various valve design according to the requirements of working conditions, can be designed as throttle type valve flap, cut-off check valve flap, flat soft seal and so on.
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In January 2017, two long-diameter bellows ammonia shut-off valves of Shanghai Yonglong Valve Factory passed the various sealing pressure tests passed by the 3rd party mechanical equipment company in Pakistan power plant, which was approved by Party A of Pakistan Power Plant and put into production application. After the semi-annual probation period is passed, we will place an order with us.
Long-diameter bellows ammonia shut-off valve is suitable for gas, ammonia, gas storage tank pipelines; widely used in petrochemical, steel, textile, electric power and other ammonia production or use of ammonia products or ammonia nitrogen wastewater discharge enterprises, can also be used for municipal Treatment of sewage and landfill leachate, production of chemical fertilizers (application of ammonia to produce ammonium sulfate, ammonium nitrate, ammonium bicarbonate, urea and other chemical fertilizers), synthetic fibers, leather, medicine, plastics, dyes, etc., alkali, resin, Oil refining and other industries are also exposed to liquid ammonia equipment.
(2) Auxiliary seals - non-metallic fillers / woven fillers with corrosion inhibitors or PTFE PTFE V-rings and graphite (steam) for added reliability, safety and high temperature resistance, providing a Maintenance-free conditions.
The main products of Shanghai Yonglong Valve Factory include bellows valve (corrugated pipe ammonia shut-off valve, bellows gas chlorine shut-off valve, bellows liquid chlorine shut-off valve, stainless steel liquid ammonia shut-off valve, stainless steel ammonia gas shut-off valve, liquid ammonia pneumatic shut-off valve , liquid ammonia electric shut-off valve, gas emergency shut-off valve) gate valve, globe valve,
Check valves, traps, and Y-filters. Widely used in petroleum, chemical, metallurgy, electric power, fire, food, dairy, paper and engineering supporting industrial pipelines, trusted by the majority of users and praise, in high temperature, low temperature, toxic and irritating gases, strong rot, high and low temperature In the fields of energy conservation, etc., it has the unique advantages of being well-designed, safe and reliable.