Flow controller (PN 25) AVQ - return and flow mounting

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Data sheet Flow controller (PN 5) - return and flow mounting Description is a self-acting flow controller primarily for use in district heating systems. The controller closes when set max.

Main data: DN -50 k VS 1,6-5 m 3 /h Flow range 0,03- m 3 /h PN 5 Flow restrictor p: 0, bar Temperature: - Circulation water / glycolic water up to 30%: 0 C Connections: - Ext.

1 Data sheet Flow controller (PN 5) - return and flow mounting Description is a self-acting flow controller primarily for use in district heating systems. The controller closes when set max. flow is exceeded. The controller has a control valve with adjustable flow restrictor and an actuator with one control diaphragm. Main data: DN -50 k VS 1,6-5 m 3 /h Flow range 0,03- m 3 /h PN 5 Flow restrictor p: 0, bar Temperature: - Circulation water / glycolic water up to 30%: 0 C Connections: - Ext. thread (weld-on, thread and flange tailpieces) - Flange Ordering Example: Flow controller; DN ; k VS 1,6; PN 5; flow restrictor p 0, bar; T max 0 C; ext. thread - 1 DN controller Code No: 003H67 Option: - 1 Weld-on tailpieces Code No: 003H6908 The controller will be delivered completely assembled, inclusive impulse tube between valve and actuator. Controller Picture DN k VS (mm) (m3/h) Connection Code No. 1,6 003H67,5 G ¾ A 003H673 4,0 003H ,3 Cylindr. ext. thread G 1 A 003H ,0 acc. to ISO 8/1 G 1¼ A 003H ,5 G 1¾ A 003H G A 003H G ½ A 003H ,5 003H Flanges PN 5, acc. to EN H H673 DEN-SMT/SI VD.LI.A1.0 Danfoss 04/013 1

2 Ordering (continuous) Accessories Picture Type designation DN Connection Code No. 003H H6909 Weld-on tailpieces 5 003H H H H6913 R ½ 003H690 0 R ¾ 003H6903 External thread tailpieces 5 Conical ext. thread acc. to R 1 003H EN R 1¼ 003H R 1½ 065F R 065F H69 Flange tailpieces 0 Flanges PN 5, acc. to EN H H6917 Service kits Picture Type designation DN k VS (m 3 /h) Code No. 1,6 003H6863,5 003H6864 Valve insert 4,0 003H ,3 003H ,0 003H / 40 / 50 1,5 / 16 / 0 / 5 003H6868 Actuator Fixed setting (bar) Code No. 0, 003H6841 Technical data Valve Nominal diameter DN k VS value Range of max. flow setting 1,6,5 4,0 6,3 8,0 1,5 16/0 4) 0/5 4) from 0,03 0,07 0,07 0,16 0, 0,4 0,8 0,8 p b = 0, bar to m 3 /h 0,86 1,4, 3,0 3,5 8, or to 3) 0,9 1,6,4 3,5 4, Cavitation factor z 0,6 0,55 0,5 Leakage acc. to standard IEC 534 % of k VS 0,0 0,05 Nominal pressure PN 5 Min. differential pressure see remark ) bar Max. differential pressure 0 16 Medium Circulation water / glycolic water up to 30% Medium ph Min. 7, max. 10 Medium temperature C 0 Connections Materials Valve body valve External thread External thread and flange tailpieces Weld-on and external thread Flange - thread Red bronze CuSn5ZnPb (Rg5) Ductile iron flange - EN-GJS LT (GGG 40.3) Valve seat Stainless steel, mat. No Valve cone Sealing Pressure relieve system Dezincing free brass CuZn36PbAs EPDM Piston p b - differential pressure over flow restrictor ) Depends on the flow rate and valve k VS ; For Q set = Q max -> p min 0,5 bar; For Q set < Q max -> Q pmin pb k VS 3) Higher max flow are achieved at higher differential pressures over controller. In general at Δp > 1-1,5 bar 4) Flange valve body VD.LI.A1.0 Danfoss 04/013 DEN-SMT/SI

3 Technical data (continuous) Actuator Type Actuator size cm 54 Nominal pressure PN 5 Flow restrictor diff. pressure bar 0, Materials Actuator housing Diaphragm Impulse tube Upper casing of diaphragm Lower casing of diaphragm Stainless steel, mat. No Dezincing free brass CuZn36PbAs EPDM Copper tube Ø 6 1 mm Application principles - Return mounting Direct-connected heating system Indirectly connected heating system - Flow mounting Direct-connected heating system Indirectly connected heating system Installation positions Up to medium temperature of 100 C the controllers can be installed in any position. For higher temperatures the controllers have to be installed in horizontal pipes only, with a pressure actuator oriented downwards. Electrical actuator Note! Installation positions for electrical actuators AMV(E) have to be observed as well. Please see relevant Data Sheet. DEN-SMT/SI VD.LI.A1.0 Danfoss 04/013 3

4 Pressure temperature diagram EN-GJS LT (GGG 40.3) PN 5 CuSn5ZnPb (Rg5) PN 5 working area Maximum allowed operating pressure as a function of medium temperature (according to EN 109- and EN 109-3). Flow diagram Sizing and setting diagram Relation between actual flow and number of revolutions on flow restictor. Values given are approximate. DN 50 k VS 0 / 5 DN 40 k VS 16 / 0 DN 5 k VS 8,0 DN 0 k VS 6,3 DN k VS 4,0 DN k VS,5 DN k VS 1,6 DN 3 k VS 1,5 1 = 360 º Flow can be adjusted by turning flow restrictor screw counter-clockwise as shown in this diagram. Remark: Controllers DN 40 and DN 50 have the same curve up to 9 revolutions. Note: For max flow setting on the controller diagrams from Instructions should be used. Water flow shown at differential pressure across flow restrictor 0, bar (0 kpa) and across the controller from 0,5 bar (50 kpa) to 16/0 bar (1600/000 kpa). 4 VD.LI.A1.0 Danfoss 04/013 DEN-SMT/SI

5 Sizing - Directly connected heating system Example 1 Motorised control valve (MCV) for mixing circuit in direct-connected heating system requires differential pressure of 0,3 bar (30 kpa) and flow less than 600 l/h. Given data: Q max = 0,6 m 3 /h (600 l/h) p min = 0,9 bar (90 kpa) p circuit = 0,1 bar (10 kpa) p MCV = 0,3 bar (30 kpa) selected p ) b = 0, bar (0 kpa) Remark: p circuit corresponds to the required pump pressure in the heating circuit and is not to be considered when sizing the. ) p b is differential pressure over flow restrictor. The total (available) pressure loss across the controller is: p,a = p min p MCV = 0,9 0,3 p,a = 0,6 bar (60 kpa) Possible pipe pressure losses in tubes, shut-off fittings, heatmeters, etc. are not included. Select controller from flow diagram, page 4, with the smallest possible k VS value considering available flow ranges. k VS = 1,6 m 3 /h The min. required differential pressure across the selected controller is calculated from the formula: Δp, MIN Q k max VS p,min = 0,34 bar (34 kpa) p,a > p,min 0,6 bar > 0,34 bar 0,8 Δpb 0, 1,6 Solution: The example selects DN ; k VS value 1,6; flow setting range 0,03-0,9 m 3 /h. Q max Δp min Δp circuit Δp b Δp Δp MCV Q max Δp min Δp circuit Δp b Δp Δp MCV DEN-SMT/SI VD.LI.A1.0 Danfoss 04/013 5

6 Sizing (continuous) - Indirectly connected heating system Example Motorised control valve (MCV) for indirectly connected heating system requires differential pressure of 0,3 (30 kpa) bar and flow less than 1900 l/h. Given data: Q max = 1,9 m 3 /h (1900 l/h) p min = 1,1 bar (110 kpa) p exchanger = 0,1 bar (10 kpa) p MCV = 0,3 bar (30 kpa) selected p b = 0, bar (0 kpa) Remark: p b is differential pressure over flow restrictor The total (available) pressure loss across the controller is: p,a = p min p exchanger p MCV = 1,1 0,1 0,3 p,a = 0,7 bar (70 kpa) Possible pipe pressure losses in tubes, shut-off fittings, heatmeters, etc. are not included. Select controller from flow diagram, page 4, with the smallest possible k VS value considering available flow ranges. k VS = 4,0 m 3 /h The min. required differential pressure across the selected controller is calculated from the formula: Δp, MIN Q k max VS p,min = 0,43 bar (43 kpa) Δp,A > Δp,MIN 0,7 bar > 0,43 bar 1,9 Δpb 0, 4,0 Solution: The example selects ; DN ; k VS value 4,0; flow setting range 0,07-,4 m 3 /h. Q max Δp min Δp exchanger Δp b Δp Δp MCV Q max Δp min Δp exchanger Δp b Δp Δp MCV 6 VD.LI.A1.0 Danfoss 04/013 DEN-SMT/SI

7 Design 1. Cover. Adjustable flow restrictor 3. Valve body 4. Valve insert 5. Pressure relieved valve cone 6. Valve stem 7. Built-in spring for flow rate control 8. Control drain 9. Control diaphragm 10. Union nut 11. Upper casing of diaphragm 1. Lower casing of diaphragm 13. Impulse tube 14. Compression fitting for impulse tube Function Flow volume causes pressure drop across the adjustable flow restrictor. Resulting pressures are being transferred through the impulse tubes and/or control drain in the actuator stem to the actuator chambers and act on control diaphragm for flow control. The flow restrictor diff. pressure is controlled and limited by means of built-in spring for flow control. Control valve closes on rising differential pressure and opens on falling differential pressure to control max flow. Settings Flow setting Flow setting is being done by the adjustment of the flow restrictor position. The adjustment can be performed on the basis of flow adjustment diagram (see relevant instructions) and/or by the means of heat meter. DEN-SMT/SI VD.LI.A1.0 Danfoss 04/013 7

8 Dimensions L 3 L L 1 d n d SW R SW SW k DN R SW d L 1 ) L L 3 k d n mm 1/ 3 (G 3/4A) /4 41 (G 1A) (G 11/4A) /4 63 (G 1¾A) / 70 (G A) (G ½A) Conical ext. thread acc. to EN ) Flanges PN 5, acc. to EN 109- DN -5 DN 3-50 DN 3-50 DN L L H mm H H H Weight (thread),7,7,9 5,3 5,5 6,1 kg Weight (flange) ,8 11,4 13,5 Note: other flange dimensions-see table for tailpieces. 8 VD.LI.A1.0 Produced by Danfoss A/S 04/013

Flow controller (PN 25) AVQ - return and flow mounting

Flow controller (PN 25) AVQ - return and flow mounting Data sheet Flow controller (PN 5) - return and flow mounting Description is a self-acting flow controller primarily for use in district heating systems. The controller closes when set max. flow is exceeded.