Datasheet Content
[{"filename":"dmk-6_datasheet_us_226378.pdf","text":"Butterfly Control Valve\n\n DMK/6 Series\n\n\n\n\n UL Listed for US and Canada\n • UL 842 and ULc C125 & C842\n • File # MH 18741\n\n Models\n • DMK 707/6 (3/4” NPT)\n • DMK 710/6 (1” NPT)\n • DMK 712/6 (1 1/4” NPT)\n • DMK 715/6 (1 1/2” NPT)\n • DMK 720/6 (2” NPT)\n\n Commonwealth of Massachusetts\n Approved Product\n • Approval code G1-1107-35\n • Control Valve, Butterfly Type\n\n Codes and Standards\n This product is intended for instal-\n lations covered by but not limited to\n NFPA 86, ANSI Z83.4/ CSA 3.7, ANSI\n Z83.18/CSA 4.9, ANSI Z21.13,\n CSD-1, UL 795 or CSA B149.1, CSA\n B149.3, CSA B149.6.\n\n DUNGS is an ISO 9001 Technical description Application\n manufacturing facility. The DMK butterfly control valve actuates The DMK is recommended for industrial\n from 0° to 90° degrees in either direc- and commercial heating applications for\n tion; it is not a tight shut-off valve. Inlet modulating gas or air supply to burners.\n side male thread and outlet-side female The DMK butterfly control valve is suit-\n thread enable a space-saving assembly able for dry natural gas, propane, bu-\n directly on most DUNGS safety shutoff tane, air and other inert gases. Suitable\n valves. for up to 0.1 % by volume, dry H2S.\n\n - Max. operating pressure: 7 PSI A “dry” gas has a dew point lower than\n\n\n\n\n DMK Sales Brochure • P/N 226378 • Ed. 02/23\n - Max. differential pressure: 3.6 PSI +15 °F and its relative humidity is less\n - Multiple internal orifice diameters than 60 %.\n available for specific flow require-\n ments\n - Requires a DUNGS direct drive DMA\n actuator with operation time: 12 s or\n 30 s for 90°; 4 - 20 mA input.\n - Small, light weight, easy to install,\n functional, rugged, and maintenance-\n free due to no linkages\n1…6\n\f DMK/6 Butterfly control valve is used for modulating gas or air supply to burners; not a tight shut-off valve.\n\nSpecifications DMK 707/6 DMK 710/6 DMK 712/6 DMK 715/6 DMK 720/6\nPipe thread (NPT) 3/4“\t\t1“\t\t1 1/4“\t\t1 1/2“\t\t2“\nMale input female output\nMax. pressure 7 PSI (500 mbar)\nMax. differential pressure (Highfire) 3.6 PSI (250 mbar) for optimal performance\nMax. body pressure 15 PSI (1000 mbar)\nFlow when closed (0°) See flow curve 1\nFlow when open (90°) See flow curves 2, 3, & 4\nTorque Max. 4.4 in-lbs (50 Ncm)\nActuator angle 90° from open to closed\nOrifice diameters avaliable (mm) DMK 707/6 Diameters (mm) 11\n DMK 710/6 Diameters (mm) 15\n DMK 712/6 Diameters (mm) 19\n DMK 715/6 Diameters (mm) 24 and 28\n DMK 720/6 Diameters (mm) 32\nMaterials in contact with gas Housing: Aluminium\n Shaft:\t\t Stainless steel\n Seals:\t\t NBR-based rubber\nAmbient temperature 5 °F to +140 °F (-15 °C to +60 °C)\nInstallation position Multipoised\nActuator Use with DUNGS DMA actuator\nTurndown 20 : 1\n\nEquipment selection Check whether the required minimum\n Perform leakage and func-\nAlways select the valve with the largest flow is attained in valve position 0°. The\n tional tests after mounting.\n∆p pressure drop (∆p > 4.0 in. W.C.) to minimum flow of the application should\nachieve good “regulating and control fall within the recommended operating\n Direct contact between hard-\nbehavior”. ranges in diagram 1.\n ening masonry, concrete walls,\n At low flow, the pressure drop of upstream\n floors and butterfly valve is not\nThe following values must be known to equipment is reduced and the available\n permitted.\nsize the DMK. ∆p of the valve increases.At low flow, the\n pressure drop of upstream equipment\n Set pressure reference value\n1. Maximum flow Vmax. is reduced and the available ∆p of the\n on gas pressure regulator.\n2. Pressure drop ∆p at maximum flow. valve increases.\n Only perform load reduction\n3. Minimum flow Vmin.\n via butterfly valve.\n4. Pressure drop ∆p at minimum flow.\n\n\n\n\n 2…6\n\f Flow Curve 1\n DMK/6 series\n Vmin. valve position 0°\n valve closed\n\n\n\n\n Inlet Pressure (in.W.C.)\n operating range\n\n\n\n\n Flow (CFH) of natural gas; s.p. 0.64 at 60°F\n\n\n\n\n3…6\n\fFlow Curve 2\nDMK 710/6\nVmax. valve position 90° DMK 710/6 DMK 710/6\nvalve open\n Ø 15 Ø 21\n\n\n\n\n Pressure Drop (in.W.C.)\n operating range\n\n\n\n\n Flow (CFH) of natural gas; s.p. 0.65 at 60 °F\n\n\n\nFlow Curve 3\nDMK 707/6 - DMK 715/6\nVmax. valve position 90°\nvalve open\n\n\n\n\n Pressure Drop (in.W.C.)\n operating range\n\n\n\n\n Flow (CFH) of natural gas; s.p. 0.65 at 60 °F\n 4…6\n\f Flow Curve 4\n DMK 712/6, DMK 720/6\n Vmax. valve position 90°\n valve open\n\n\n\n\n operating range\n\n\n\n\n Pressure Drop (in.W.C.)\n\n\n\n\n Flow (CFH) of natural gas; s.p. 0.65 at 60 °F\n\n\n\n\n Pressure drop for other gases the “corrected” flow rate in CFH through f (f = 0.66 for propane). Use this “cor-\n To determine the pressure drop when the valve for the other gas used. For ex- rected” flow rate and the flow curve on\n using a gas other than natural gas, ample, when using propane, divide the the next page to determine pressure\n use the flow formula below and f value volume (CFH) of propane required for drop for propane.\n located in the table below to determine the application by the calculated value\n\n Determining equivalent flow through valves using another gas\n\n\n\n ° ° Type of gas Density\n Vgas used = V Natural gas x f [kg/m3]\n s.g. f\n\n Natural gas 0.81 0.65 1.00\n Butane 2.39 1.95 0.58\n Propane 1.86 1.50 0.66\n Density of Natural gas Air 1.24 1.00 0.80\n\n f= Density of gas used\n\n\n\n\n5…6\n\f Butterfly Control Valve\n DMK/6\n\n\n\n\n Dimensions inch (mm)\n DMK 707/6 - 720/6\n…
