Data sheet Seated valves (PN 16) VF 2 2-way valve, flange VF 3 3-way valve, flange Description VF 2 VF 3 VF 2 and VF 3 valves provide a quality, cost effective solution for most water and chilled applications. The valves are designed to be combined with AMV(E) 335, AMV(E) 435 or AMV(E) 438 SU actuators. Main data: DN 15-80 k VS 0.63-100 m 3 /h PN 16 Temperature: - Circulation water / glycolic water up to 50%: 2 130 C Flange connections Compliance with Pressure Equipment Directive 97/23/EC Ordering Example: 2-way valve, DN 15, k VS 1.6, PN 16, t max 130 C, flange connection - 1 VF 2 DN 15 valve Code No.: 065Z0273 2-way valves VF 2 k VS t max. DN (m 3 /h) PN ( o C) Code No. 0.63 065Z0271 1.0 065Z0272 15 1.6 065Z0273 2.5 065Z0274 4.0 065Z0275 20 6.3 065Z0276 16 130 25 10 065Z0277 32 16 065Z0278 40 25 065Z0279 50 40 065Z0280 65 63 065Z0281 80 100 065Z0282 3-way valves VF 3 DN k VS t max. PN (m 3 /h) ( o C) Code No. 0.63 065Z0251 1.0 065Z0252 15 1.6 065Z0253 2.5 065Z0254 4.0 065Z0255 20 6.3 065Z0256 16 130 25 10 065Z0257 32 16 065Z0258 40 25 065Z0259 50 40 065Z0260 65 63 065Z0261 80 100 065Z0262 Accessories Type DN 15-50 / AMV(E)15,25,35 Adapter DN 65-80 / AMV(E)15,25,35 Code No. 065Z0311 065Z0312 Service kits Type Stuffing box DN 15 DN 20 DN 25 DN 32 DN 40/50 DN 65/80 Code No. 065Z0321 065Z0322 065Z0323 065Z0324 065Z0325 065Z0327 DH-SMT/SI VD.LS.D1.02 Danfoss 06/2009 1
Technical data Nominal diameter DN 15 20 25 32 40 50 65 80 k VS value m 3 /h 0.63 1.0 1.6 2.5 4.0 6.3 10 16 25 40 63 100 Stroke mm 10 15 20 Control range 30:1 50:1 100:1 Control characteristic LOG: port A-AB; LIN: port B-AB Cavitation factor z 0.4 Leakage acc. to standard IEC 534 A - AB 0.05 % of k VS B - AB 1.0 % of k VS Nominal pressure PN 16 Max. closing pressure bar 4 2.5 Medium Circulation water / glycolic water up to 50 % Medium ph Min. 7, Max. 10 Medium temperature o C 2 130 Connections Flange PN 16 acc. to EN 1092-2 Materials Valve body Valve spindle Valve cone Gasket Grey cast iron EN-GJL-250 (GG-25) Stainless steel Brass EPDM Pressure temperature diagram working area EN-GJL-250 (GG-25), PN 16 Maximum allowed operating pressure as a function of medium temperature (according to EN 1092-2) 2 VD.LS.D1.02 Danfoss 06/2009 DH-SMT/SI
Installation Hydraulic connections Mount according to flow direction as indicated on valve body. AB is always the outlet port; inlets are A (two port) or A and B (three port). Valve mounting Before mounting the valve be sure that the pipes are clean and free from swarf. It is essential that the pipes are lined up squarely with the valve at each connection and that they are free from vibrations. Install the motorized control valves with the actuator in a vertical or horizontal position but not upside down. Leave sufficient clearance to facilitate the dismantling of the actuator from the valve body for maintenance purposes. The valve must not be installed in an explosive atmosphere or at an ambient temperature higher than 50 C or lower than 2 C. It must not be subject to steam jets, water jets or dripping liquid. Note: the actuator may be rotated up to 360 with respect to the valve body by loosening the retaining fixture. Once the actuator is rotated, retighten the fixture. Hydraulic diagrams for applications of 3-way mixing valves Note the valve must only be used as a mixing valve, and is not suitable for diverting (with one inlet and two outlet ports). Where this function is required, the valve should be mounted in the return line, see fig. on right. Mixing valve used in mixing application Mixing valve used in diverting application Disposal The valve must be dismantled and the elements sorted into various material groups before disposal. DH-SMT/SI VD.LS.D1.02 Danfoss 06/2009 3
Sizing Flow Rate (liquid with specific a gravity of 1) l/sec m 3 /h Flow Rate (liquid with a specific gravity different to 1) m 3 /h l/sec FLOW Pressure drop kpa (100 kpa = 1bar = ~ 10 m H 2 O) Specific gravity Examples 1 For fluids with a specific gravity of 1 (e.g. water) Design data: Flow rate: 6 m 3 /h System pressure drop: 55 kpa Locate the horizontal line representing a flow rate of 6 m 3 /h (line A-A). The valve authority is given by the equation: p1 Valve authority, a = p1+ p2 Where: Δp1 = pressure drop across the fully open valve Δp2 = pressure drop across the rest of the circuit with a full open valve The ideal valve would give a pressure drop equal to the system pressure drop (i.e. an authority of 0.5): if: Δp1 = Δp2 a = Δp½ * Δp1 = 0.5 In this example an authority of 0.5 would be given by a valve having a pressure drop of 55 kpa at that flow rate (point B). The intersection of line A A with a vertical line drawn from B lies between two diagonal lines; this means that no ideally-sized valve is available. The intersection of line A A with the diagonal lines gives the pressure drops stated by real, rather than ideal, valves. In this case, a valve with k VS 6.3 would give a pressure drop of 90.7 kpa (point C): 9 0. 7 hence valve authority = = 9 0. 7 + 5 5 0. 6 2 The second largest valve, with k VS 10, would give a pressure drop of 36 kpa (point D): 36 hence valve authority = = 0. 3 9 5 3 6 + 5 5 Generally, for a 3 port application, the smaller valve would be selected (resulting in a valve authority higher than 0.5 and therefore improved control). However, this will increase the total pressure and should be checked by the system designer for compatibility with available pump heads, etc. The ideal authority is 0.5 with a preferred range of between 0.4 and 0.7. 4 VD.LS.D1.02 Danfoss 06/2009 DH-SMT/SI
Sizing (continued) 2 For fluids with a specific gravity different from 1 Design data: Flow rate: 6 m 3 /h of fluid, S.G. 0.9 System pressure drop: 10 kpa For this example, the left-hand axis of the diagram must be ignored. Starting from the right-hand axis, the flow rate of 6 m 3 /h is located (point E). The intersection of the diagonal line from point E with a vertical line from S.G. = 0.9 gives the starting point for the effective flow rate line F-F. The process then continues as for Example 1, 10 kpa intersects F-F nearest to the k VS 16 diagonal. The intersection of F-F with k VS 16 gives a valve pressure drop of 12.7 kpa (see sizing diagram on page 4, point G). Design 1. Valve body 2. Valve insert 3. Valve cone 4. Valve stem 5. Fixed valve seat 6. Moving valve seat (pressure relieved) 7. Pressure relieved chamber DN 15-32 DN 40, 50 DN 65, 80 DH-SMT/SI VD.LS.D1.02 Danfoss 06/2009 5
Design (continued) 1. Valve body 2. Valve insert 3. Valve cone 4. Valve stem 5. Fixed valve seat 6. Moving valve seat (pressure releifed) DN 15-32 DN 40, 50 DN 65, 80 6 VD.LS.D1.02 Danfoss 06/2009 DH-SMT/SI
Dimensions AMV(E) 335/435 + VF 2 AMV(E) 438 SU + VF 2 AMV(E) 335/435 + VF 3 AMV(E) 438 SU + VF 3 Type VF 2 VF 3 DN L H H1 H2 DC d n Weight mm mm mm mm mm mm mm kg 15 130 240 260 65 14 4 1.93 20 150 247 267 75 14 4 2.65 25 160 256 276 85 14 4 3.23 32 180 273 293 100 18 4 4.97-40 200 284 304 110 18 4 6.59 50 230 297 317 125 18 4 8.53 65 290 342 362 145 18 4 15.92 80 310 353 373 160 18 8 18.13 15 130 255 63 275 65 14 4 2.61 20 150 264 70 284 75 14 4 3.55 25 160 273 75 293 85 14 4 4.54 32 180 283 80 303 100 18 4 6.90 40 200 317 90 337 110 18 4 9.05 50 230 339 100 359 125 18 4 12.79 65 290 365 120 385 145 18 4 19.18 80 310 416 155 436 160 18 8 23.73 DH-SMT/SI VD.LS.D1.02 Danfoss 06/2009 7
8 VD.LS.D1.02 Produced by Danfoss A/S 06/2009