The valves are used in combination with AMV(E) 130/140, AMV(E) 130H/140H and AMV(E) 13 SU actuators. DN k VS
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1 Description VZ 2 VZ 3 VZ 4 VZ valves provie a high quality, cost effective solution for the control of hot an/or chille water for fan coil units, small reheaters, an recoolers in temperature control systems. The valves are use in combination with AMV(E) 130/140, AMV(E) 130H/140H an AMV(E) 13 SU actuators. Main ata: DN 15, 20 k VS m 3 /h PN 16 ogarithmic flow characteristic Temperature: - Circ. water / glycolic water up to 50%: C Reuce k VS on B port (VZ3 & VZ4 only) inear bypass on 3 an 4 port valves Valves are supplie with screwe plastic cover for manual operation Connections: flat en or conex Orering VZ 2 Valve Picture ()* recommene p VZ 3 Valve Picture ()* recommene p DN k VS Max. p Coe No. (mm) (m 3 /h) (bar) Flat En Z Z Z (1)* Z Z Z Z (1)* Z5321 DN k VS (A-AB) k VS (B-AB) Max. p Coe No. (mm) m 3 /h (bar) Flat En Z Z Z (1)* Z Z Z Z (1)* Z5421 Danfoss VD.HB.I7.02 1
2 Orering (continuous) VZ 4 Valve Picture ()* recommene p DN k VS (A-AB) k VS (B - AB) Max. p Coe No. (mm) m 3 /h (bar) Flat En Z Z Z (1)* Z Z Z Z (1)* Z5521 NOTE: k VS - is the flow in m 3 /h of water at a temperature between 5 C an 40 C which passes through a valve open at the nominal stroke with 100 kpa (1 bar) pressure rop. Max. Δp is the physical limit of ifferential pressure the valve will close against. The recommene Δp - values in parentheses () is base on the generation of noise, plug erosion etc. It shoul be checke against the Δp figure calculate from the chart on page 4 or the equation below, with the valve fully opene at the esigne flow rate. p valve = S Q k vs 2 S = specific gravity Q = flow rate in m 3 /h Δp valve = pressure rop across valve in bar (fully open). Conversion factors 1 bar = 100 kpa = 14.5 psi 1 l/s = 1 kg/s = 3.6 m 3 /h Accessories Connection Pipe size DN Description Coe No. Tailpieces with external threa R 3/8 15 Consist of 2 union nuts, 065Z7015 R ½ 20 2 tailpieces an 2 gaskets (Ms 58) 003H6902 Connection Pipe size DN Description Coe No. Tailpieces for solering 12 mm 15 Consist of 2 union nuts, 2 soler bushes 065Z mm 20 an 2 gaskets (Ms 58) 065Z7017 Technical ata Control characteristic ogarithmic Control range min. 50:1 eakage loss, close valve A - AB 0.05 % of kvs B - AB 1 % of kvs Meium Circulation water / Glycolic water up to 50 % Meium temperature C Max. operating pressure bar 1 Stroke mm 5.5 Connection External threa (flat connection (MS 58) or conex)) Materials Boy, seat an cone Dezincing free brass CuZn36Pb2As Stem Stainless steel Stuffing box EPDM 2 VD.HB.I7.02 Danfoss
3 Pressure temperature iagram PN 16 Disposal The valve must be ismantle an the elements sorte into various material groups before isposal. Manual operation Valves are supplie with screwe plastic cover for manual operation. Note: The flow is reuce on 75 % in case of using plastic cover. Closing A-AB Opening A-AB Danfoss VD.HB.I7.02 3
4 Installation Hyraulic connections Mount accoring to flow irection as inicate on the valve boy. AB is always the outlet port; inlets are A (two port) or A an B (three or four port). Valve mounting Before mounting the valve be sure that the pipes are clean an free from swarf. It is essential that the pipes are line up squarely with the valve at each connection an are free from vibrations. The valve is supplie complete with installation instructions. The water quality shoul meet VDI 2035 requirements. AMV(E) 130/140, AMV(E) 130H/140H + VZ The valve shoul be aequately supporte to prevent stress being applie to the connections uring operation. A maximum tightening torque of 25 to 30 Nm shoul be applie to the connections. Install the valve so that the actuator will be mounte in a vertical or horizontal position but not upsie own. AMV(E) 13 SU + VZ eave sufficient clearance to allow the ismantling of the actuator from the valve boy for maintenance purposes. The valve must not be installe in an explosive atmosphere or at an ambient temperature higher than 50 C or lower than 2 C. It must not be subjecte to steam jets, water jets or ripping liqui. Note that the actuator may be rotate up to 360 with respect to the valve boy, by loosening the retaining fixture. After this operation retighten. Ensure that the irection of flow is correct as shown in typical application examples (fig.1 an 2). The three way valve must be installe as a mixing valve. If possible the valves shoul be positione in the return sie. Fig. 1 Mixing valve use in mixing application Fig. 2 Mixing valve use in iverting application Note: Install a strainer upstream of the valve (e.g. Danfoss FVR/FVF) AMV(E) FVR/FVF 4 VD.HB.I7.02 Danfoss
5 Sizing Example Flow rate: 0.3 m 3 /h System pressure rop: 20 kpa ocate the horizontal line representing a flow rate of 0.3 m 3 /h (line A). The valve authority is given by the equation: ΔP Valve authority,n 1 ΔP ΔP 1 Where: Δ P 1 = pressure rop across the fully open valve, Δ P 2 = pressure rop across the rest of the circuit with a fully open valve The ieal valve woul give a pressure rop equal to the system pressure rop (i.e. an authority of 0.5): If P 1 = P 2 N = P 1 /2P 1 = 0.5 In this example an authority of 0.5 woul be given by a valve having a pressure rop of 20 kpa at that flow rate (point B). 2 The intersection of line A with a vertical line rawn from B lies between two iagonal lines; this means that no ieally-size valve is available. The intersection of line A with the iagonal lines gives the pressure rops state by real, rather than ieal, valves. In this case, a valve with k VS 0.6 woul give a pressure rop of 25 kpa (point C): 25 hence valve authority 0, The secon-largest valve, with k VS 1, woul give a pressure rop of 9 kpa (point D): 9 hence valve authority 0, Generally, for a 3 port application, the smaller valve woul be selecte (resulting in a valve authority higher than 0.5, an therefore improve controllability). However, this will increase the total pressure an shoul be checke by the system esigner for compatibility with available pump hea, etc. The ieal authority is 0.5 with a preferre range of between 0.4 an 0.7. Design to close to close A-AB to close A-AB A AB A AB A AB B B B 2 Port 3 Port 4 Port Danfoss VD.HB.I7.02 5
6 Dimensions h h H H H AMV(E) 130/140 + VZ 2 92 AMV(E) 130/140 + VZ 3 h AMV(E) 130/140 + VZ c h 1 H 1 H 2 AMV(E) 130H/140H + VZ. AMV(E) 13 SU + VZ. Valve type H H 1 H 2 h h 1 c Valve weight mm (kg) VZ 2 / DN 15 G ½ VZ 2 / DN 20 G ¾ VZ 3 / DN 15 G ½ VZ 3 / DN 20 G ¾ VZ 4 / DN 15 G ½ VZ 4 / DN 20 G ¾ Tailpieces for solering Tailpieces with external threa G Ø Weight mm (kg) ½ ¾ G Ø G R Weight ( ) (mm) (kg) ½ 3 ₈ ¾ ½ G R 6 VD.HB.I7.02 Danfoss
7 Danfoss VD.HB.I7.02 7
8 8 VD.HB.I7.02 Danfoss DHS-SRMT/SI
The valves are used in combination with AMV(E) 130/140, AMV(E) 130H/140H and AMV(E) 13 SU actuators. DN k VS
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