A, HLS small-caliber single-seat control valve Product Overview HLS small-caliber single-seat control valve is one of the CV3000 series. HLS small-caliber single-seat control valve compact structure, there were S streamlined channel to the pressure drop, flow rate, adjustable wide range of flow characteristics of high precision, in line with IEC534-2-1976 standards. HLS small-caliber single-seat control valve is adjusted by the multi-spring pneumatic diaphragm actuator and low flow resistance fine small single-seat valve body composition, HLS small-caliber single-seat control valve has a compact, light weight, sensitive, pressure drop valve capacity, flow characteristics of precision, easy maintenance, etc., can be used to harsh working conditions. HLS small-caliber single-seat control valve leakage in line with ANSI B16.104 standard. HLS small-caliber single-seat control valve product line with GB / T4213-92 standards. HLS small-caliber single-seat control valve two, HLS small-caliber single-seat control valve main technical parameters 1, the valve body through single-seat type casting ball valve nominal diameter 20,25mm Nominal pressure ANSI 125,150,300,600 JIS 10,16,20,30,40K PN1.6,4.0,6.4MPa connection type sealing surface FF, RF, RJ, LG, MFM flange standard JIS B220, JB / T79, ANSI B16.5-1981, GB / T9113, HG20594-97, HG20618-97 welding, such as welding standard scarfing SW material steel, the corrosion-resistant alloy CrMo steel, cast stainless steel, Hastelloy valve cover normal temperature type -17 ~ + 230 ℃ elongation I type -45 ~ -17 ℃, + 230 ~ + 566 ℃ Elongation type II -100 ~ -45 ℃ Elongation type III -196 ~ -100 ℃ Bolt Clamp type gland packing V-type PTFE packing, impregnated poly tetrafluoroethylene asbestos packing, asbestos braided packing, graphite packing 2, the spool valve member in the form of single-seat piston-type metal spool valve flow characteristics equal percentage, linear characteristic soft seat material stainless steel, stainless steel welding Stellite alloys, titanium and corrosion-resistant alloys, etc. 2, Actuators TYPE HA multi-spring diaphragm actuator diaphragm material EPDM clip nylon, nitrile rubber nylon spring clip range 20 ~ 100,80 ~ 240KPa gas pressure 140 ~ 400KPa Air Connection RC1 / 4 "Ambient temperature -30 ~ + 70 ℃ action implemented in the form of pneumatic valve or reverse acting actuators - off type or gas - open - with accessories Locator, air filter pressure reducer, to secure his position valve, limit switch, valve position transmitter, hand wheel and other three, HLS small-caliber single-seat control valve key performance indicators Item Index leakage metal valve seat is less than 0.01% of rated capacity, in line with ANSI B16.104- 1976 IV-class soft seat valve rated capacity of less than 10, in line with ANSI B16.104-1976 VI level hysteresis band locator less than 1% of the whole trip without locator less than 3% of total travel (HA1 type less than full stroke 5%) with a basic error locator less than full stroke ± 1% -7 (HA1 type less than the full stroke of ± 2%) with no less than the full stroke of the locator ± 5% - Note: The standard V-type PTFE vinyl packing adjustable range 50: 1 (0.25≤Cv≤14) or 30: 1 (Cv≤0.16) See: http: //www.zgchuanhu.com/cv3000-hls.html