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Nvd 812 check valves
1.
˝ A DN B (mm) C-PN6 (mm) C - PN10/16/ ASA
150 (mm) C - PN25/40/ ASA 300 (mm) Weight (kg) ½ 15 16 44 53 53 0,10 ¾ 20 19 54 63 63 0,14 1 25 22 64 73 73 0,23 1¼ 32 28 78 84 84 0,35 1½ 40 31,5 88 94 94 0,52 2 50 40 98 109 109 0,73 2½ 65 46 118 129 129 1,52 3 80 50 134 144 144 2,17 4 100 60 154 162 170 3,35 5 125 90 - 192 192 8,55 6 150 106 - 218 224 12,70 8 200 140 - - 284 30,00 1DEN-SMT/SI VD.BO.P1.02 © Danfoss 05/2013 Non return Valve - Danfoss NVD 812 Features: • Operates in any position • Easy to install and dismantle, space-saving • Minimum head loss • Does not generate hammering • Closing system : disc with parabolic edges with return spring ; lateral guiding by 3 or 4 ribs (DN 15 to 100). • Closing system with back axial guiding and return spring (ND 125 to 200). • Metal/metal seal (machined trim) Description Ordering Dimensions Note: The indicated pressure for the different categories of fluids (L1/L2/G1/G2) is under no condition a guarantee of use. Therefore, it is essential to validate the use of products under given operating conditions. • Using these check valves on networks equipped with piston pumps or compressors is not recommended. Main Data: • DN 15 - 200 • kVS 4,24 - 546 m3 /h • PN 25/40 • Medium: - Circulation water, drinking water or chilled glycolic water up to 50% • Medium Temperature: - 10 … 350°C • Leakage rate according to EN12266-1 rate E • International construction Standards: - CE Conformity Directive 97/23/CE - Connection according to ASA B16.1 class 125RF - Connection according to ASA B16.5 class 150RF and 300RF - Connection according to EN 1092.2 - Overall dimensions according to EN558-1 series 49 • Approvals: ˝ DN Kv (m3/h) PN PFA (bar) PS (bar) Code No. L1 L2 G1 G2 ½ 15 4,24 40 40 40 40 40 40 065B7530 ¾ 20 7,80 065B7531 1 25 12,40 065B7532 1¼ 32 18,00 30 065B7533 1½ 40 28,00 25 065B7534 2 50 40,10 20 065B7535 2½ 65 72,50 30 15 065B7536 3 80 111,00 25 12 065B7537 4 100 182,00 20 10 065B7538 5 125 302,00 16 0,5 28 065B7539 6 150 370,00 13 0,5 23 065B7540 8 200 546,00 40 17 25 065B7541 B C B C B C PED 97/23/CE Data sheet
2.
2 Produced by
Danfoss A/S © 05/2013VD.BO.P1.02 Design Headloss diagram Pos. Description Material EURO ANSI 1 Casing DN15 DN20 to 65 DN80 to 100 DN125 to 200 Stainless steel X5CrNi18-10 GX5CrNi19-10 GX2CrNiMo19-11-2 GX5CrNi19-10 AISI 304 AISI 304 AISI 316L AISI 304 2 Closing system DN15 to 100 DN125 to 200 Stainless steel X2CrNiMo17-12-2 GX5CrNi19-10 AISI 316L AISI 304 3 Spring Stainless steel X10CrNi18-8 AISI 302 4 Stop / Guide DN15 DN20 to 100 DN125 to 150 DN200 Stainless steel X5CrNiMo17-12-2 X2CrNi18-9 GX2CrNiMo19-11-2 GX5CrNi19-10 AISI 316L AISI 304L AISI 316L AISI 304 5 Centering collar DN15 Other DN Stainless steel X2CrNi18-9 AISI 304L 6 Clips Stainless steel X10CrNi18-8 AISI 302 7 Discharge anti-static braid Copper − − 0 5 10 15 20 25 30 35 40 -10 0 Température (°C) WORKING AREA Pression(bar) 50 100 150 200 250 300 350 360 5 6 1 43 2 1 4 3 2 7 1 4 3 2 7 DN Opening pressure (mm)/WC KV (m3 /h) ζ ˝ (mm) Without spring ½ 15 160 120 140 20 4,24 4,4 ¾ 20 165 125 145 20 7,80 4,1 1 25 165 115 140 25 12,40 4,0 1¼ 32 190 130 160 30 18,00 5,0 1½ 40 200 120 160 40 28,00 5,1 2 50 210 110 155 50 40,10 6,1 2½ 65 210 100 155 55 72,50 5,3 3 80 226 95 160 65 111,00 5,2 4 100 235 75 205 80 182,00 4,7 5 125 335 75 205 130 302,00 4,2 6 150 360 70 215 145 370,00 5,8 8 200 515 105 310 205 546,00 8,4 Data sheet Danfoss NVD 812 Direction for use : • Solid line : Valve completely open • Dotted line : opening stage of valve
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