Insulation valve series: BQ41F necking insulation valve details: BQ41F necking necking thermal insulation ball valve characteristics BQ41F have insulation, cold properties. Designed and manufactured according to GB standard flange connection by 79-94 manufacture used in petroleum, chemical, metallurgical, pharmaceutical industries. BQ41F necking insulation ball thanks to the steam-jacketed insulation. Therefore, even if the outside temperature is below freezing, the valve remains operational flexibility to ensure that the pipeline can disconnect, the advantage of the general control valve does not have. It is desirable to control the heavy oil pipeline valve. According to user needs jacketed steam injection, oil, cooling water, air and so on. Temperature or the temperature of the entire valve length to achieve the required cooling. Can prevent the media crystallization. BQ41F necking insulation ball valve products have good cold insulation properties, consistent with pain in diameter and the diameter of the valve, while effectively lowering the pipeline medium heat loss. Mainly used in petroleum, chemical, metallurgy, pharmaceutical, food and other types of systems, to deliver further solidifies at room temperature, high viscosity media. Second, the reduction necking insulation material of main parts ball table: No. Part Name Material No. Part Name Material GB ASTM GB ASTM 1 jacket 25 A105 5 balls 2 seat WCB A216-WCB 6 valve stem 1Cr13 A247-410 3 1Cr18Ni9Ti SS304 7 Flexible graphite packing 4 ring PTFE, for 8-bit polystyrene packing gland WCB A216-WCB Note: necking insulation valve main parts and sealing surface material can be designed to be used according to the actual working conditions or special requirements of users. Third, necking insulation valve technical specifications: Design Standards ASME B 16.34 GB / T 12224 Structural length ASME B 16.10 GB / T 12221 Flange ASME B 16.34 JB / T 79 Drive Manual, electric, pneumatic testing and inspection JB / T9092 API 598 Medium heavy oil, glue, etc. tend to solidify the medium No. Part Name Material GB ASTM 1 jacket 251,052 WCB A216-WCB 3 seat body 25 A105 4 ring PTFE, para 6 polystyrene spheres stem 1Cr13 5 A247-410 7 8 flexible graphite packing gland WCB A216-WCB Note: necking insulation valve sealing surface of the main parts and materials can be designed according to actual working conditions or special requirements of users. BQ41F necking ball I type insulation main connection dimensions nominal diameter DN LD D1 D2 BF Z-Φd 2-G 15 130 95 65 45 14 2 4-Φ14 3/8 20 150 105 75 55 14 2 4-Φ14 3/8 25 160 115 85 65 14 2 4-Φ14 3/8 32 165 135 100 78 16 2 4-Φ18 1/2 40 180 145 110 85 16 3 4-Φ18 1/2 50 200 160 125 100 16 3 4-Φ18 1 / 2 65 220 180 145 120 18 3 4-Φ18 1/2 80 250 195 160 135 20 3 4-Φ18 1/2 100 280 215 180 155 20 3 4-Φ18 1/2 125 320 280 240 210 22 3 4- Φ23 1/2 150 360 335 295 265 26 3 4-Φ23 1/2 BQ41F necking insulation ball Π-type main connection dimensions nominal diameter DN LD D1 D2 BF Z-Φd 2-G 15 130 95 65 45 14 2 4- Φ14 3/8 20 150 105 75 55 14 2 4-Φ14 3/8 25 160 115 85 65 14 2 4-Φ14 3/8 32 165 135 100 78 16 2 4-Φ18 1/2 40 180 145 110 85 16 3 4-Φ18 1/2 50 200 160 125 100 16 3 4-Φ18 1/2 65 220 180 145 120 18 3 4-Φ18 1/2 80 250 195 160 135 20 3 4-Φ18 1/2 100 280 215 180 155 20 3 4-Φ18 1/2 125 320 280 240 210 22 3 4-Φ23 1/2 150 360 335 295 265 26 3 4-Φ23 1/2