Flow controller (PN 16, 25, 40) AFQ / VFQ 2(1) - return and flow mounting

Transcription

1 Data sheet Flow controller (PN 16, 5, 40) AFQ / VFQ ( - return and flow mounting Description The controller has a control valve with adjustable flow restrictor and an actuator with one control diaphragm. Further on two valve versions are available: - VFQ with metallic sealing cone - VFQ 1 with soft sealing cone (on special request) The controller is a self-acting flow controller primarily for use in district heating systems. The controller closes when set max. flow is exceeded. Main data: DN k VS 4,0-400 m 3 /h Flow range: 0,1-50 m 3 /h PN 16, 5, 40 Flow restrictor p b : 0, bar or 0,5 bar Temperature: - Circulation water / glycolic water up to 30 %: 140 / 150 / 00 C Connections: - Flange Ordering Example 1: Flow controller; DN 15; k VS 4,0; PN 16; metallic sealing; flow restrictor p b 0, bar; T max 150 C; flange; - 1 VFQ DN 15 valve Code no: 065B654-1 AFQ actuator Code no: 003G104-1 AFQ DN 15 impulse tubes Code no: 003G1338 Products will be delivered separatly. VFQ Valves (metallic sealing cone) Picture DN k VS T max. Code No. Connections (mm) (m 3 /h) ( C) PN 16 PN 5 PN ,0 065B B B ,3 065B B B ,0 065B B B B B B B B B B B67 065B Flanges acc. to EN B B B B B B B66 065B B B B B B B B B B B689 Impulse tubes AFQ Note: other valves available on special request. at temperatures above 150 C only with seal pots (see Accessories) AFQ Actuators Picture Flow restrictor p b Max. oper. pressure Code No. (bar) (PN) 0, 003G ,5 003G105 DEN-SMT/SI VD.CA.O3.0 Danfoss 01/015 1

2 Ordering (continuous) Example : Flow controller; DN 15; k VS 4,0; PN 16; metallic sealing; flow restrictor p b 0, bar; T max 00 C; flange; - 1 VFQ DN 15 valve Code no: 065B654-1 AFQ actuator Code no: 003G104 - AFQ DN 15 impulse tubes Code no: 003G Seal pot V1 Code no: 003G139 Products will be delivered separatly. Accessories Picture Type designation For controller Impulse tubes (Stainless steel) AFQ DN (mm) PN Code No G G G , 5, G G G G G G G G G1404 With combination piece KF or KF3 use 003G1391 at PN 16 and T<150 C. Otherwise impulse tubes on special request. Seal pot V1 Impulse tubes AFQ Accessories Picture Type designation Description Ordering number Code No. Impulse tube set AF - 1 Copper tube Ø mm - 1 compression fitting for imp. tube connection to pipe (G 1/4) - socket DN DN 00, G1391 Seal pot V1 Compression fitting ) Capacity 1 liter; with compression fittings for imp. tube Ø10 For impulse tube Ø10 connections to controller AFQ 003G139 G 1/4 003G1468 Combination piece KF3 For combination with pressure and electrical actuators G 11/4 / G 11/4 003G1397 Combination piece KF For combination with thermostat 003G1398 Shut off valve Throttle valve For impulse tube Ø10-003G B909 Seal pot has to be used on impulse tubes always when T max 150 C ) Consist of a nipple, compression ring and nut Service kits Picture Type designation For valve Valve insert VFQ Stuffing cone (with EPDM O-rings) DN k VS (mm) (m 3 /h) Code No B B B B B B B B G1464 VD.CA.O3.0 Danfoss 01/015 DEN-SMT/SI

3 Technical data Valve Nominal diameter DN k VS value Range of max. flow setting 4,0 6,3 8, from 0,1 0, 0, 0,4 0,6 0, p b = 0, bar to m 3 /h p b = 0,5 bar from 0, 0,3 0,3 0,5 0,8 1, to Cavitation factor z 0,6 0,6 0,6 0,55 0,55 0,5 0,5 0,45 0,4 0,35 0,3 0, 0, Leakage acc. to standard IEC 534 (% of k VS ) VFQ 0,03 0,05 VFQ 1 0,01 Nominal pressure PN 16, 5, 40 Min. differential pressure Max. differential pressure PN 16 bar 16 PN 5, 40 0 see remark ) Medium Circulation water / glycolic water up to 30 % Medium ph Min. 7, max. 10 Medium temperature Connections Materials Valve body VFQ 150 / 00 3) C 140 VFQ PN 16 PN 5 Flange Grey cast iron EN-GJL-50 (GG-5) Ductile iron EN-GJS-400(GGG-40.3) PN 40 Cast steel GP40GH (GS-C 5) Valve seat Stainless steel, mat. No Valve cone Stainless steel, mat. No Sealing VFQ VFQ 1 Metal EPDM Stainless steel, mat. No Stainless steel, mat. No Pressure relieve system Bellows (Stainless steel, mat. No Diaphragm (EPDM) 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 -> p 3) at temperatures above 150 C only with seal pots (see Accessories) min Q k VS pb Actuator Type Actuator size cm 50 Max. operational pressure PN 5 AFQ Flow restrictor diff. press. p b bar 0, / 0,5 Materials Actuator housing Control diaphragm Impulse tube Stainless steel, mat. No , zinc plated and yellow chromate EPDM (Rolling; fibre enforced) Stainless steel tube Ø10 0,8 mm / copper tube Ø10 1 mm, threaded fitting G 1/4, ISO 8 DEN-SMT/SI VD.CA.O3.0 Danfoss 01/015 3

4 Application principles - Return mounting Direct-connected heating system Indirectly connected heating system - Flow mounting Direct-connected heating system Indirectly connected heating system Combinations Example: Flow temperature controller, return mounting; DN 15; k VS 4,0; PN 16; metallic sealing; flow restrictor p b 0, bar; T max 150 C; flange; - 1 VFQ DN 15 valve Code no: 065B654-1 AFQ actuator Code no: 003G Impulse tube set AF Code no: 003G AFT06 thermostat Code no: Combination piece KF Code no: 003G1398 Products will be delievered separatelly. Note: For AFT06 and STFW thermostats data see relevant data sheets AFT06 / KF / AFQ / VFQ - Flow and temperature controller STFW / KF / AFQ / VFQ - Flow and safety temperature controller 4 VD.CA.O3.0 Danfoss 01/015 DEN-SMT/SI

5 Installation positions DN T max 10 C The controllers can be installed in any position. DN T max > 10 C; DN The controllers can be installed in horizontal pipes only, with a pressure actuator oriented downwards. DN T max 10 C DN T max > 10 C; DN Pressure temperature diagram Working area is below P-T line and it ends at Tmax for each valve PN 16 working area 1 EN-GJL-50 (GG-5) 140 (for DN ) Maximum allowed operating pressure as a function of medium temperature (according to EN 109-) PN 5 working area 1 EN-GJS-400 (GGG-40.3) Maximum allowed operating pressure as a function of medium temperature (according to EN 109-) PN 40 EN-GP-40-GH (GS-C 5) working area (for DN ) Maximum allowed operating pressure as a function of medium temperature (according to EN 109- Note: 1 at temperatures above 150 C only with seal pots (see Accessories) DEN-SMT/SI VD.CA.O3.0 Danfoss 01/015 5

6 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 AFQ. ) p b is differential pressure over flow restrictor. The total (available) pressure loss across the controller is: p AFQ,A = p min p MCV = 0,9 0,3 p AFQ,A = 0,6 bar (60 kpa) Possible pipe pressure losses in tubes, shut-off fittings, heatmeters, etc. are not included. Select controller from table, page 3, 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 AFQ, MIN Q k max VS p AFQ,MIN = 0, bar ( kpa) p AFQ,A > p AFQ,MIN 0,6 bar > 0, bar 0,6 Δpb 0, 4 Solution: The example selects AFQ DN 15; k VS value 4,0; flow setting range 0,1-,0 m 3 /h. Q max Δp min AFQ Δp circuit Δp b Δp AFQ Δp MCV AFQ Q max Δp min Δp circuit Δp b Δp AFQ Δp MCV 6 VD.CA.O3.0 Danfoss 01/015 DEN-SMT/SI

7 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 AFQ,A = p min p exchanger p MCV = 1,1 0,1 0,3 p AFQ,A = 0,7 bar (70 kpa) Possible pipe pressure losses in tubes, shut-off fittings, heatmeters, etc. are not included. Select controller from table, page 3, 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 AFQ, MIN Q k max VS p AFQ,MIN = 0,43 bar (43 kpa) Δp AFQ,A > Δp AFQ,MIN 0,7 bar > 0,43 bar 1,9 Δpb 0, 4,0 Solution: The example selects AFQ; DN 15; k VS value 4,0; flow setting range 0,1-,0 m 3 /h. Q max Δpmin AFQ Δp exchanger Δp b Δp AFQ Δp MCV AFQ Q max Δp min Δp exchanger Δp b ΔpAFQ Δp MCV DEN-SMT/SI VD.CA.O3.0 Danfoss 01/015 7

8 Design 1. Valve body. Cover 3. Adjustable flow restrictor 4. Valve seat 5. Valve insert 6. Pressure relieved valve cone 7. Valve stem 8. Bellows for pressure relief of valve cone 9. Diaphragm for pressure relief of valve cone 10. Actuator 11. Control diaphragm for flow control 1. Built-in spring for flow control 13. Stuffing cone 14. Union nut 15. Impulse tube 16. Compression fitting for impulse tube 17. Upper casing of diaphragm 18. Lower casing of diaphragm 19. Valve body extension 0. Shut off valve for water filling 1. Closing plug AFQ / VFQ DN VFQ ( DN , T max 140 C VFQ DN , T max 00 C Function Flow volume causes pressure drop across the adjustable flow restrictor. Resulting pressures are being transferred through the impulse tubes 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 rate 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. 8 VD.CA.O3.0 Danfoss 01/015 DEN-SMT/SI

9 L L VFQ DN ø60 78 ø89 10 B H L H 1 B H B 1 VFQ DN VFQ DN with valve body extension up to 00 C A SW 110 Shut off valve Ø10 40 H Data sheet Flow controller AFQ / VFQ ( (PN 16, 5, 40) Dimensions VFQ, VFQ 1 Valves DN L B mm H Weight PN 16 / 5 8, kg ,5 1,5 15,5 18,5 PN B mm H Weight (valve with body extension) PN 16 / kg PN AFQ Actuator Size cm 50 Ø A 63 mm H 160 Weight kg 9 40 Seal pot V1 70 Comb. piece KF, KF3 G1/4 SW19 Compression fitting DEN-SMT/SI VD.CA.O3.0 Danfoss 01/015 9

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12 1 VD.CA.O3.0 Produced by Danfoss A/S 01/015