Flow controller with integrated control valve (PN 16) AHQM return and flow mounting

Transcription

1 Data sheet Flow controller with integrated control valve (PN 16) AHQM return and flow mounting Description DN DN 40, 50 DN DN 125 DN 150 DN 200, 250 AHQM is a self-acting flow controller with integrated control valve primarily for use in district heating systems or in secondary district heating systems as well. The controller closes when set max. flow is exceeded. In combination with Danfoss electrical actuators AMV(E) can be controlled by ECL electronic controllers. The controllers have a control valve with adjustable flow restrictor, connection neck for electrical actuator, and an actuator with one control diaphragm. Controllers are used together with Danfoss electrical actuators: DN with - AMV(E) 10 - AMV(E) 13 with spring return function - AMV(E) 130, AMV(E) AMV(E) 130H, AMV(E) 140H with manual operation DN with - AMV(E) AMV(E) 438 SD spring return function (spring down) DN with - AMV(E) 55/56 DN with - AMV(E) 85/86 Main data: DN k vs m 3 /h Flow range m 3 /h PN 16 Flow restrictor Δp b : bar for DN bar for DN bar for DN 40, bar for DN bar for DN Temperature: - Circulation water / glycolic water up to 30%: C Connections: - Ext. thread (weld-on, thread and flange tailpieces) - Flange AHQM, DN combined with AMV(E) 13 has been approved according to DIN EN DEN-SMT/SI VD.LR.J2.02 Danfoss 06/2011 1

2 Ordering Example AHQM controller: Flow controller with integrated control valve, DN 15, k vs 1.6, PN 16, flow restrictor Δp 0.12 bar, t max 120 C, ext. thread - 1 AHQM DN 15 controller Code No.: 003L3594 Option: - 1 Weld-on tailpieces Code No.: 003H6908 Electrical actuator AMV(E) must be ordered separately. AHQM Controller Picture DN (mm) 15 kvs (m 3 /h) 1.0 Connection Code No. 003L G ¾ A 003L L G 1 A 003L3595 Cylindr. ext. thread acc. to ISO 228/ G 1¼ A 003L G 1¾ A 003L G 2 A 003L G 21/2 A 003L L L L L3606 Flange EN L L L L3614 Accessories Picture Type designation DN Connection Code No H H6909 Weld-on tailpieces H H H H R ½ 003H R ¾ 003H6903 External thread tailpieces 25 Conical ext. thread acc. to R 1 003H EN R 1¼ 003H R 11/2 065F R 2 065F H6915 Flange tailpieces 20 Flanges PN 25, acc. to EN H H VD.LR.J2.02 Danfoss 06/2011 DEN-SMT/SI

3 Technical data Valve (thread version) Nominal diameter DN k VS value Flow range Q m 3 min /h Q nom 1) Stroke mm Control ratio > 1:30 > 1:50 > 1:100 > 1:200 Control characteristic Leakage acc. to standard IEC 534 Linear 0.05 % of k VS Nominal pressure PN 16 Min. differential pressure see remark 2) bar Max. differential pressure 4 Medium Circulation water / glycolic water up to 30% Medium ph Min. 7, max. 10 Medium temperature C Connections Materials Valve body Valve seat DP, CV Valve cone DP Valve cone CV Sealing DP Sealing CV 1) At differential pressure across the controller Δp AHQM 0.5 bar 2 2) Q Depends on the flow rate and valve k VS ; nom pmin p k 3) vs Depends on DN Note: DP - diff. pressure controller, CV - control valve External thread DZR CW602N (CuZn36Pb2As) 3) b EPDM Grey cast iron EN-GJL-250 (GG25) St. steel, mat. No St. steel, mat. No DZR CW602N (CuZn36Pb2As) EPDM Metal Actuator For valve DN Actuator size cm Nominal pressure PN 16 Flow restrictor diff. pressure Δp b bar Materials Housing* Diaphragm DZR CW602N (CuZn36Pb2As) Impulse tube - * Actuator housing is part of valve body. EPDM Grey cast iron EN-GJL-250 (GG25) DEN-SMT/SI VD.LR.J2.02 Danfoss 06/2011 3

4 AHQM (flange version) Nominal diameter DN k vs value Flow range Q m 3 min /h Q nom 1) Stroke mm Control ratio > 1:200 > 1:30 > 1:300 Control characteristic Leakage acc. to standard IEC % of k VS 0.01 % of k VS Nominal pressure PN 16 Linear Min. differential pressure see remark 2) bar Max. differential pressure 4 Medium Circulation water / glycolic water up to 30 % Medium ph Min. 7, max. 10 Medium temperature C Connections Materials Valve body Valve seat DP, CV Valve cone DP Valve cone CV Sealing DP Sealing CV St. steel, mat. No ) At differential pressure across the controller Δp AHQM 0.5 bar 2 2) Q Depends on the flow rate and valve k VS ; nom pmin p k 3) vs Depends on DN Note: DP - diff. pressure controller, CV - control valve Actuator St. steel, mat.no DZR CW602N (CuZn36Pb2As) 3) b EPDM Metal Flange Grey cast iron EN-GJL-250 (GG25) St. steel, mat. No St. steel, mat. No NC St. steel, mat.no For valve DN Actuator size cm Nominal pressure PN 16 Flow restrictor diff. pressure Δp b bar Materials Housing Grey cast iron EN-GJL-250 (GG25) St. steel, mat.no Diaphragm Impulse tube - Stainless steel tube Ø mm EPDM EPDM 4 VD.LR.J2.02 Danfoss 06/2011 DEN-SMT/SI

5 Application principles - Return mounting Direct-connected heating system Indirectly connected heating system - Flow mounting Direct-connected heating system Indirectly connected heating system Installation positions DN The controllers can be installed in horizontal or vertical pipes with (connection neck for) electrical actuator oriented upwards. DN DN The controllers can be installed with (connection neck for) electrical actuator oriented horizontal or upwards. DN The controllers can be installed with (connection neck for) electrical actuator oriented upwards. DN Electrical actuator Note! Installation positions for electrical actuators AMV(E) have to be observed as well. Please see relevant Data Sheet. DN DEN-SMT/SI VD.LR.J2.02 Danfoss 06/2011 5

6 Pressure temperature diagram PN 16 working area DN CuZn36Pb2As (DZR) PN 16 working area DN EN-GJL-250 (GG-25) Maximum allowed operating pressure as a function of medium temperature (according to EN and EN ). 6 VD.LR.J2.02 Danfoss 06/2011 DEN-SMT/SI

7 Flow diagram Sizing and setting diagram Relation between actual flow and number of revolutions on flow restictor. Values given are approximate. DN 32 k VS 6.3 DN 25 k VS 4.0 DN 20 k VS 2.5 DN 15 k VS 1.6 DN 15 k VS 1.25 DN 15 k VS = 360º DN 100 k VS 90 DN 50 k VS 20 (flange) DN 50 k VS 20 (thread) DN 80 k VS 63 DN 65 k VS 50 DN 40 k VS = 360º DN 250 k VS 400 DN 200 k VS 320 DN 150 k VS 280 DN 125 k VS = 360º Flow can be adjusted by turning flow restrictor screw counter-clockwise as shown in this diagram Water flow shown at differential pressure across the controller from 0.5 bar (50 kpa) to 4 bar (400 kpa). DEN-SMT/SI VD.LR.J2.02 Danfoss 06/2011 7

8 Sizing - Directly connected heating system Example 1 Motorised control valve (MCV) for mixing circuit in direct-connected heating systems requires differential pressure of 0.12 bar (12 kpa) and flow less than 600 l/h. Given data: Q max = 0.6 m 3 /h (600 l/h) p min = 0.8 bar (80 kpa) * p circuit = 0.1 bar (10 kpa) p MCV = 0.12 bar (12 kpa) selected * Remark: p circuit corresponds to the required pump pressure in the heating circuit and is not to be considered when sizing the AHQM. The total (available) pressure loss across the controller is: p AHQM,A = p min p AHQM,A = 0.8 bar (80 kpa) Possible pipe pressure losses in tubes, shut-off fittings, heatmeters, etc. are not included. Select controller from flow diagram, page 5, 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 2 2 Q max. 0.6 AHQM, MIN = + ΔpMCV = + kvs 1.6 p AHQM,MIN = 0.26 bar (26 kpa) p AHQM,A > p AHQM,MIN 0.8 bar > 0.26 bar 0.12 Solution: The example selects AHQM DN 15, k vs value 1.6, flow setting range m 3 /h. 8 VD.LR.J2.02 Danfoss 06/2011 DEN-SMT/SI

9 Sizing (continuous) - Indirectly connected heating system Example 2 Motorised control valve (MCV) for indirectly connected heating system control requires differential pressure of 0.14 (14 kpa) bar and flow less than 1500 l/h. Given data: Q max = 1.5 m 3 /h (1500 l/h) p min = 0.8 bar (80 kpa) p exchanger = 0.1 bar (10 kpa) = 0.14 bar (14 kpa) selected p MCV The total (available) pressure loss across the controller is: p AHQM,A = p min - p exchanger = p AHQM,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 5, 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 2 2 Q max. 1.5 AHQM, MIN = + ΔpMCV = + kvs 4.0 p AHQM,MIN = 0.28 bar (28 kpa) p AHQM,A > p AHQM,MIN 0.7 bar > 0.28 bar 0.14 Solution: The example selects AHQM DN 25, k vs value 4.0, flow setting range m 3 /h. DEN-SMT/SI VD.LR.J2.02 Danfoss 06/2011 9

10 Design 1. Valve body 2. Control valve insert 3. Adjustable flow restrictor 4. Control valve stem 5. Valve seat 6. Differential pressure actuator 7. Control diaphragm 8. Built-in spring for flow rate control 9. Pressure relieved valve cone 10. Valve stem 11. Control drain 12. Control diaphragm cover 13. Spring cover DN DN 40, 50 DN VD.LR.J2.02 Danfoss 06/2011 DEN-SMT/SI

11 Design (continuous) 1. Valve body 2. Control valve insert 3. Adjustable flow restrictor 4. Control valve stem 5. Valve seat 6. Differential pressure actuator 7. Control diaphragm 8. Built-in spring for flow rate control 9. Pressure relieved valve cone 10. Valve stem 13. Impulse tube 14. Bellows for pressure relief of valve cone 15. Diaphragm for pressure relief of valve cone 16. Safety valve DN 125 DN 150 DN 200, DEN-SMT/SI VD.LR.J2.02 Danfoss 06/

12 Function Flow controller with integrated control valve Flow volume causes the pressure drop across the adjustable flow restrictor. Resulting pressures are being transferred through external impulse tubes or control drains within valve body to the actuator chambers and act on control diaphragm. The flow restrictor diff. pressure is controlled and limited by means of built-in spring for flow rate control. Additionally the electrical actuator will operate from zero to set max. flow according to the load. 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. Dimensions DN DN L H mm H D (ISO 228/1) G ¾A G 1A G 1¼A G 1¾A Valve weight kg DN SW 32 (G ¾A) 41 (G 1A) 50 (G 1¼A) 63 (G 1¾A) d R 1) ½ ¾ 1 1 ¼ L1 2) L2 mm L k d n ) Conical ext. thread acc. to EN ) Flanges PN 25, acc. to EN VD.LR.J2.02 Danfoss 06/2011 DEN-SMT/SI

13 Dimensions (continuous) DN AMV(E) 10 + AHQM AMV(E) 13 + AHQM DN AMV(E) L* AMV(E) AMV(E) L** AMV(E) mm AMV(E) H* AMV(E) AMV(E) H** AMV(E) DN L* L** mm H* H** AMV(E) 130(H)/140(H) + AHQM DEN-SMT/SI VD.LR.J2.02 Danfoss 06/

14 Dimensions (continuous) DN 40, 50 L 1 H 2 b H 1 H 3 AMV(E) AHQM AMV(E) 438 SD + AHQM DN L 1 H 1 H 2 H 3 H 4 b Valve weight mm ISO 228/1 (kg) G G 2½ 6.2 DN H 1 SW 1 H 1 SW 2 R 11/2 2 SW R d SW d H 2 H 2 L 1 mm L H DN H 2 H 1 a H 3 L 1 L 2 H H 4 H 4 L 1 AMV(E) AHQM AMV(E) 438 SD + AHQM L 1 H 1 H 2 H 3 H 4 a Valve weight DN mm (EN ) (kg) VD.LR.J2.02 Danfoss 06/2011 DEN-SMT/SI

15 Dimensions (continuous) DN 125, 150 H 2 H 1 H 2 H 1 a a L 1 L 1 AHQM DN 125 AHQM DN 150 H 3 H 3 AMV(E) 55/56 + AHQM DN 125 AMV(E) 55/56 + AHQM DN 150 DN L 1 H 1 H 2 H 3 a Valve weight mm (EN ) (kg) DEN-SMT/SI VD.LR.J2.02 Danfoss 06/

16 Dimensions (continuous) DN 200, 250 a H 2 H 1 H 3 L 1 AHQM DN 200, 250 AMV(E) 85/86 + AHQM DN 200, 250 DN L1 H1 H2 H3 a Valve weight mm (EN ) (kg) VD.LR.J2.02 Produced by Danfoss A/S 06/2011