Page 1 of 15 Dynamic Pressure and Regulation Description The system is a dynamic valve arrangement designed to regulate flow and differential pressure. Application The system can be installed in both domestic and commercial heating and cooling systems. The PV-SIGMA Compact combines the Frese SIGMA Compact dynamic balancing valve positioned in the flow and the Frese PV Compact differential pressure control valve positioned in the return. Operation The system ensures 1% flow and differential pressure regulation under all conditions, irrespective of any changes within the system whilst providing simple and trouble free commissioning. The system operates by limiting the flow and pressure in a system, eliminating any noise caused by excess differential pressure. Benefits Features Simple presetting of flow and differential pressure and differential pressure can be adjusted independently of each other Differential pressure can be easily adjusted after installation Tamperproof presetting device fitted on the top of the differential pressure control valve Size range: DN15 to DN5 Maximum flow: 1.3m 3 /h Maximum differential pressure 4kPa Setting ranges: 5kPa-3kPa, 2-6kPa and 2-8kPa Differential pressure regulation, flow regulation, drain and PT plugs as standard EN SEP 15 No additional commissioning required if the system design is changed High levels of comfort and energy savings for the end user The PV Compact eliminates noise caused by high differential pressure whilst the SIGMA Compact limits the flow in a system, ensuring no overflows Isolation function on the SIGMA Compact Compact housings for easy installation
Page 2 of 15 Dynamic Pressure and Regulation Design Simplified outline Frese SIGMA Compact Adjustable Dynamic Balancing Valve System Frese PV Compact Adjustable Differential Pressure Control Valve Return Measurement of differential pressure and flow across the valve Frese SIGMA Compact Design flow: Q is adjusted directly on Frese SIGMA Compact (see graphs on the pre-set diagram) P F+ Differential pressure : ΔP S is adjusted directly on Frese PV Compact (see graphs on the pre-set diagram) P F- Return Frese PV Compact The flow in the system is verified by measuring minimum differential pressure (min. Δp) is avaliable across the Frese SIGMA Compact valve. Measured from P F+ to P F- (see graphs on the preset diagram) EN SEP 15 P - P + Δp of the system is measured from P F- to P +
Page 3 of 15 Dynamic Pressure and Regulation Technical data Housing DN15-32: DN4-5 DP controller: setting: Spring: Diaghragm: O-rings: Pressure class: Max. differential pressure: Temperature range: Capillary tube: DZR Brass, CW62N Ductile Iron PPS (4% glass) PA6 (2% glass) Stainless steel HNBR EPDM PN25 4 kpa -1 C to + 12 C Ø3, L = 1 mm H1 H L The pipe system shall be properly ventilated to avoid risk of air pockets. Glycolic mixtures up to 5% are applicable (both ethylene and propylene). Recommendation: Water treatment to VDI 235. H2 Return H3 L EN SEP 15 Dimension DN15 DN2 DN25 DN32 DN4 DN5 Version Low High Low High Low High - - - Control range kpa 5-3 2-6 5-3 2-6 5-3 2-8 2-8 2-8 2-8 range Dimension mm,14 -,167 5-6 gpm,22-2,64,28 -,278 1-1,44-4,4,28 -,278 1-1,44-4,4,42 -,536 15-193,66-8,5 TBC TBC TBC,28 -,536 75-193 3,3-8,5,278-1,389 1-5 4,4-22,1,833-2,56 3-74 13,21-32,58 L 75 79 78 1 14 138 138 H 87 87 9 11 11 131 131 H1 18 18 18 114 119 121 127 H2 82 82 82 134 134 156 156 H3 66 66 66 72 77 8 86 1,389-2,875 5-135 22,1-45,57
Page 4 of 15 Dynamic Pressure and Regulation Product programme Dimension DN15 DN2 DN25 DN32 DN4 DN5 53-326 53-3262 53-3264 Frese PV-SIGMA Compact with drain valve, P/T plugs and capillary tube. Low 5-3 kpa 53-3261 Low 5-3 kpa 53-3263 Low 5-3 kpa 53-3266 53-3265 2-8 kpa 53-3267 Low 2-8 kpa 53-3268 Low 2-8 kpa High 2-6 kpa High 2-6 kpa High 2-8 kpa Accessories Female/Male Dimensions Frese no. Isolation ball valve Frese capillary tube ø3mm x 1 mm DN15 38-52 DN2 38-522 DN25 38-524 DN32 38-526 DN4 38-528 DN5 38-53 - 48-4 EN SEP 15
Page 5 of 15 Example: Pre setting the valves Dynamic Pressure and Regulation DN15 Low Differential pressure system (ΔP S ) 12 kpa Design flow 5 (,139 ) Differential pressure setting Frese PV Compact 1. The design flow is used as the point of reference for the setting. (See the graph) 2. In order to make reading easier the graphs indicating the pressure in the circuit are arranged at intervals of 5 kpa. Still, the graphs can be offset according to the specified pressure of 12 kpa in our circuit. From the intersection of the 12 kpa graph and the horizontal line indicating 5 a line perpendicular to the x-axis is made to read the pre-set value. app. 6 turns on the scale. 3. The minimum pressure drop required will be 3. kpa across the valve. (ΔP V2 ).167 6 1.139 5.111 4.83 3.56 2.28 1 rate graph - Frese PV Compact DN15 [5-3 kpa] 12 kpa. 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2 2 Setting [number of turns] p across PV valve kpa 4.3 3. 1.9 1.1.5.1 3 setting Frese SIGMA Compact DN15 Low Design flow 5 (,139 ) 1. The design flow is used as the point of reference for the setting. (See the graph) 2. The pre-setting for the valve is found by means of the flow rate graph. Setting = 2.2.25.222.194.167.139 9 8 7 6.111 4 rate graph - Frese SIGMA Compact DN15 Low min. Δp.6 1.4 2.1 2.6 kpa 13. 11.8 5 1 3 1.9 EN SEP 15 3. The minimum pressure drop required will be 11 kpa across the valve. (ΔP V1 ).56.28 2 1.2 1 1..5 1 1.5 2 2.5 3 3.5 4 2.833 3
Page 6 of 15 Dynamic Pressure and Regulation Example: Outline of a heating system - 3 blocks with 3 flats in each 2 nd floor 1 st floor Ground floor ΔP S ΔP v1 ΔP v2 Basement ΔP p Total pump pressure From the examples on the previous pages, the total required pump pressure for the block can now be calculated: P P = P S + ( P V1+V2 ) --> P P = 12 kpa + (11 kpa + 3 kpa) = 26 kpa Example: Differential pressure change due to P-band As the flow is reduced in the circuit in question the pressure increases in reverse ratio to the flow, which is due to the P-band of the adjustment spring. The valve compensates for this, however the pressure will at no point in the circuit be as high as the pump pressure that would have been available, if Frese PV Compact had not been installed. In this example the pressure increases to approx. 14 kpa as the graph is offset parallel to the course of flow. Furthermore, you can always read from the graph what the pressure in the circuit will be at any flow rate below the rated 5..167 6 rate graph - Frese PV Compact DN15 [5-3 kpa] p across PV valve kpa 4.3.139 5 3..111 4 1.9.83 3 1.1 EN SEP 15.56 2.5.28 1.1. 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2 Setting [number of turns]
Page 7 of 15 Frese PV Compact DN15, 5-3 kpa Dynamic Pressure and Regulation.167 6 4.3.139 5 3..111 4 1.9 5 kpa 1 kpa 15 kpa 2 kpa 25 kpa 3 kpa.83 3 1.1.56 2.5.28 1.1 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2 Frese SIGMA Compact DN15 Low.25 9.6 1.4 2.1 2.6 13..222 8.194 7 11.8.167 6.139.111 5 4 1.9.833 3.56 2 1.2 EN SEP 15.28 1.5 1 1.5 2 2.5 3 3.5 4 1.
Page 8 of 15 Frese PV Compact DN15, 2-6 kpa Dynamic Pressure and Regulation.278 1 11.9.25 9 9.6.222 8 7.6.194 7 5.8.167 6 2 kpa 3 kpa 4 kpa 5 kpa 6 kpa 4.3.139 5 3..111 4 1.9.83 3 1.1.56 2.5.28 1 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2.1 Frese SIGMA Compact DN15 High.333 12.6 1.4 2.1 2.6 17..278 1.222 8 15.4.1667 6 14.4.111 4 EN SEP 15.56 2.5 1 1.5 2 2.5 3 3.5 4 14. 14.
Page 9 of 15 Frese PV Compact DN2, 5-3 kpa Dynamic Pressure and Regulation.278 1 4.5.25 9 3.7.222 8 2.9.194.167 7 6 5 kpa 1 kpa 15 kpa 2 kpa 25 kpa 3 kpa 2.2 1.6.139 5 1.1.111 4.7.83 3.4.56 2.2.28 1 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2. Frese SIGMA Compact DN2 Low.444 16 1.4 3. 3.8 4. 15..389 14 11.9.333 12.278 1 9.9.222 8.167 6.111 4 9. EN SEP 15.56 2 9..5 1 1.5 2 2.5 3 3.5 4
Page 1 of 15 Frese PV Compact DN2, 2-6 kpa Dynamic Pressure and Regulation.56 2 18.1.5 18 14.7.444 16 11.6.389 14 8.9.333.278 12 1 2 kpa 3 kpa 4 kpa 5 kpa 6 kpa 6.5 4.5.222 8 2.9.167 6 1.6.111 4.7.56 2 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2.2 Frese SIGMA Compact DN2 High.556 2 1.4 3. 3.8 4. 25.,5 18,444 16 19.2,389 14,333 12 16.,278 1.222 8.167 6 16. EN SEP 15.111,56 4 2.5 1 1.5 2 2.5 3 3.5 4 16.
Page 11 of 15 Frese PV Compact DN25L, 2-8 kpa Dynamic Pressure and Regulation 1.111 4 21.1.972 35 16.2.833 3 11.9.694 25 2 kpa 3 kpa 4 kpa 5 kpa 6 kpa 7 kpa 8 kpa 8.3.556 2 5.3.417 15 3..278 1 1.3.139 5 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2.3 Frese SIGMA Compact DN25L High.556.5 2 18 1.4 3. 4.4 5.4 13..444.389 16 14 11.8.333 12.278 1 1.9.222 8.167 6 EN SEP 15.111.56 4 2.5 1 1.5 2 2.5 3 3.5 4 1.2 1.
Page 12 of 15 Frese PV Compact DN32, 2-8 kpa Dynamic Pressure and Regulation 1.389 5 24.5 1.25 45 19.9 1.111 4 15.7.972 35 12..833 3 2 kpa 3 kpa 4 kpa 5 kpa 6 kpa 7 kpa 8 kpa 8.8.694 25 6.1.556 2 3.9.417 15 2.2.278 1 1..139 5 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2.2 Frese SIGMA Compact DN32 1.389 5 2.4 5.9 8.7 1.9 21. 1.25 45 1.111.972 4 35 18.6.833 3.694 25 16.7.556 2.417 15 EN SEP 15.278.139 1 5.5 1 1.5 2 2.5 3 3.5 4 15.4 15.
Page 13 of 15 Frese PV Compact DN4, 2-8 kpa Dynamic Pressure and Regulation 2.222 8 25.6 1.944 7 19.6 1.667 6 14.4 1.389 5 2 kpa 3 kpa 4 kpa 5 kpa 6 kpa 7 kpa 8 kpa 1. 1.111 4 6.4.833 3 3.6.556 2 1.6.278 1 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2.4 Frese SIGMA Compact DN4 2.222 1.944 8 7 5.1 1.5 14.9 18. 17. 1.667 1.389 6 5 12.6 1.111.833 4 3 1.1 EN SEP 15.556.278 2 1.5 1 1.5 2 2.5 3 3.5 4 1. 1.
Page 14 of 15 Frese PV Compact DN5, 2-8 kpa Dynamic Pressure and Regulation 3.56 11 46.1 2.778 1 38.1 2.5 9 3.9 2.222 1.944 1.667 8 7 6 2 kpa 3 kpa 4 kpa 5 kpa 6 kpa 7 kpa 8 kpa 24.4 18.7 13.7 1.389 5 9.5 1.111 4 6.1.833 3 3.4.556 2 1.5.278 1 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2.4 Frese SIGMA Compact DN5 3.56 2.778 11 1 6. 12.6 16.7 2.3 26. 2.5 9 2.222 8 1.944 7 16.6 1.667 6 1.389 5 1.111 4 11.1.833 3 EN SEP 15.556.278 2 1. 1 1..5 1 1.5 2 2.5 3 3.5 4
Page 15 of 15 Dynamic Pressure and Regulation Specification Text - Dynamic Pressure & Regulation Set The valve set shall be a combination of a dynamic differential pressure control valve and an externally adjustable dynamic balancing valve The differential pressure and flow shall be adjustable on site without suspension of operation The valve set shall limit the flow and differential pressure in a circuit The valve set shall include P/T plugs for the verification of differential pressure in circuit and across the valve The valve set shall include a drain on the differential pressure control valve The differential pressure control valve scale shall only be adjustable by means of a key The dynamic balancing valve shall be adjusted by means of a lockable handle The dynamic balancing valve shall be capable of isolation The valves shall be permanently marked with an indicator for flow direction The dynamic pressure and flow regulation set shall have a pressure rating of PN25 The maximum differential pressure shall be 4 kpa The valve housing shall be DZR brass CW62N (DN15 to DN32) and Ductile Iron (DN4 to DN5) EN SEP 15 Frese A/S assumes no responsibility for errors, if any, in catalogues, brochures, and other printed matter. Frese A/S reserves the right to modify its products without prior notice, including already ordered products, if this does not alter existing specifications. All registered trademarks in this material are the property of Frese A/S. All rights reserved. Frese A/S Sorøvej 8 DK- 42 Slagelse Tel: +45 58 56 Fax: +45 58 56 91 info@frese.dk