PRESSURE INDEPENDENT CONTROL VALVE (P.I.C.V.) PN 25 776 Main features: Cim 776 is used for balancing the flow in cooling, heating and domestic water systems. Cim 776 is an automatic balancing valve with following features: Easy required flow rate selection using presetting dial; Automatic balancing in the event of fluctuating pressure conditions in system branches; Flow rate modulation along the whole electric actuator stroke; Flexibility if the system is modified after the first installation; Reduction of balancing costs, improved energy saving and high environmental comfort; Easy flushing procedure thanks to quick and simple removal of differential pressure control cartridge placed inside valve body; Technical data: It is supplied with internal thread. It is made of CR brass ( CR - Corrosion Resistant). This article is made in compliance with the quality management requirements of ISO 91:28 standard. All articles are tested according to the EN 12266-1:23 standard. It can be used in a wide variety of sectors: heating, air conditioning, water, sanitary systems and generally with any non corrosive liquid. Max. static working pressure 25 bar Max. differential pressure 4 bar (4 kpa) Max. flow temperature 12 C Min. temperature -1 C Fluids: Water and Glycol Material of parts in contact with water: Valve body; Cartridge, etc. Materials: CR Brass (EN 12165-CW62N-M) O-rings: EPDM Perox Threads: ISO 228 Approved by: 1 Rev. 3 del 4/216
Models: Cim 776LF - Pressure independent control valve - PN 25 - CR Brass - Low Flow Flow rate range DN Material Thread (l/s) (l/h) (GPM) Technical code 15 G. 1/2.22.174 78 625.34 2.75 DA335115 2 G. 3/4.36.292 131 15.58 4.62 DA33512 25 CR Brass G. 1.64.478 231 1722 1.2 7.58 DA335125 - EN 12165-CW62N-M - - - - - - - - - - - - - - - - - Cim 776HF - Pressure independent control valve - PN 25 - CR Brass - High Flow Flow rate range DN Material Thread (l/s) (l/h) (GPM) Technical code 15 G. 1/2.68.479 244 1724 1.8 7.59 DA336115 2 G. 3/4.81.566 292 239 1.28 8.98 DA33612 25 CR Brass G. 1.81.566 292 239 1.28 8.98 DA336125 32 EN 12165-CW62N-M G. 1 1/4.129.849 465 356 2.5 13.45 DA336132 4 G. 1 1/2.562 1.974 22 715 8.9 31.28 DA33614 5 G. 2.612 2.385 224 8586 9.7 37.8 DA33615 Actuators: Cim 776 P.I.C.V. is designed to be upgraded with different type of actuators to open, close and modulate the valve on circuit. DN 15-32 Three types of electric actuator are available, as follows: EMV21/145: operating voltage 24 V AC/DC - 1 V DC control signal; EMV21/146: operating voltage 24 V AC - 3-position control signal; EMV21/147: operating voltage 23 V AC - 3-position control signal; Their main features are the following: Swivel nut easy assembling; Manual operation by 3mm hexagonal key; Short circuit resistance; Protection against polarity reversal. DN 4-5 Three types of electric actuator are available, as follows: EMV212/148: operating voltage 24 V AC/DC - 1 V DC and 3- Position control signal; EMV212/15: operating voltage 23 V AC - 3-position control signal; Their main features are the following : Swivel nut easy assembling; Positional feedback signal:...1 V DC (load > 1 kω); Manual operation by a regulating knob. 2
Model EMV21/145 EMV21/146 EMV21/147 Technical code RC627 RC628 RC629 Voltage 24 V AC 24 V AC 23 V AC Control signal -1 V DC * 3 Positions 3 Positions Frequency 5/6 Hz 5/6 Hz 5/6 Hz Closing and opening times 75 sec 15 sec 15 sec Degree/Class of protection IP 4 IP 4 IP 4 Actuator stroke 5.5 mm 5.5 mm 5.5 mm Actuating force 25 N 25 N 25 N Cable length 15 mm 15 mm 15 mm Connection M3 M3 M3 Model EMV212/148 EMV212/15 Technical code RC185 RC186 Voltage 24 V AC/DC 24 V AC/DC 23 V AC Control signal -1 V DC * 3 Positions 3 Positions Frequency 5...6 Hz 5...6 Hz 5...6 Hz Closing and opening times 6/12 sec 6/12 sec 12 sec Degree/Class of protection IP 54 IP 54 IP 54 Actuator stroke...8 mm...8 mm 8 mm Actuating force 5 N 5 N 5 N Cable length 1.2 m 1.2 m 1.2 m Connection M3 M3 M3 * linear flow characteristic ** linear or equal-percentage flow characteristic 3
Cross section: 1. Valve body 2. Kit Bonnet + DP Cartridge 3. Plug 4. O-ring 5. Blue binder point 6. Red binder point 7. Plastic cap 2 7 6 1 4 3 2 5 Installation proce- Before installation of CIM 776, check that inside the valve and the pipes there are no foreign matters which might damage the tightness of the valve. Burr pipe connections after having threaded them and distribute the sealing material on pipe threads only and not on valve threads. Make sure that required flow rate is within operating range of the valve. Valves may be installed either on horizontal or vertical pipelines with the electric actuator faced-up and following the arrow direction casted on the valve body, which shall be the same as the flow one. For assembly purposes, use a spanner, not a pipe wrench, by applying necessary working torque only on the valve end nearest the pipe. This helps get a firmer grip and avoids potential damages to valve body. Make sure that pipe threading length is not longer than valve threads. The valve is supplied with a cap allowing (when screwed) the manual opening of the valve. After DPC cartridge removal and manual full opening of the valve, it is possible to flush the system branch where the valve is installed; when flushing process is over, reposition the DPC control cartridge. 4
Balancing: Presetting dial Typical installations: Lock for presetting dial Take the plastic cap screwed on the upper part of the valve off. Turn the presetting dial device (see picture) and match the black mark on the swivel part with the value stated on the fixed part of said device (min., 1, 2, 3, max), which shall correspond to required flow rate. The relation between flow rate and values shown on the presetting dial device are given by the tables stated on following pages of this brochure. Using the differential manometer Cim 726, check that the differential pressure is higher or the same as the minimum value reported in said tables. The differential manometer interfaces with the balancing valve through two sensors placed in the binder points of the valve. When balancing is achieved, screw the lock for presetting dial completely, preventing any unintentional rotation. Cim 776 is suitable for variable volume system to control fan coil flow rate directly. Below a typical installation: in each moment the flow rate is the required one and there will be no extra-flow due to the pressure fluctuations. g -- f -- e -- d -- c -- b -- a Sos. 2429 con 241999 Pos. MODIFICA / Changes S.MAURIZIO D'OPAGLIO (Italy) 2817 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 31/5/212 S.C. Uff.Tec. DATA FIRMA PROPOSTA DENOMINAZIONE / Part Name VALVOLA DI BILANCIAMENTO AUTOMATICA FIG. 776HF 3/4 Controller TOLLERANZE GENERALI SECONDO LA NORMATIVA: UNI EN 22768-mK QUOTA >,5 a 6 >6 a 3 >3 a 12 >12 TOLLERANZA ±,1 ±,2 ±,3 ±,5 TOLLERANZE GENERALI STAMPATO: UNI EN 1242 SCALA / Scale MATERIALE / Material 1:2 DATA / Date 6,3 1,6 TRATTAMENTO / 13/4/21 DISEG. / Drawing by DERIVATO DAL /DERIVATI A.P. VISTO / Checked by PESO (teorico) 883.73Gr. Finishing LOAD: SOSTITUISCE IL Power (kw) N3349/ CODICE/ Code Differential 776VIEW.PDF N temperature DISEGNO / Drawing nr. ( C) 27952/1 Copyright Cav. Uff. GIACOMO CIMBERIO S.p.A. All rights reserved. 3D /C:\Users\augusto.riva.CIMBERIO\Desktop\ANDREA\ 5
Sizing: Thanks to their unique design, these valves are able to perform the following functions: REGULATION: selection of required flow rate within the operating range; When electric actuator or plastic cap is missing, the valve is normally closed by a swing. On the contrary, if plastic cap is screwed or electric actuator installed therein, they win the force of the swing and open the valve (see picture). The inlet water goes through a modulating control component whose geometry can be modified by turning the presetting dial, according to the required flow rate in the system branch where the valve is installed. CONTROL: constant flow rate despite of pressure fluctuations; Two different pressures operate on the DPC cartridge. The first one is transmitted through the passage connecting the valve inlet to the lower section of p+ cartridge (see hydraulic scheme); the second one is registered at valve outlet by the flow rate selecting device pa. In order to keep constant the difference between the mentioned pressures, the DPC cartridge obturator operates by closing the water outlet bore to reach the preset flow rate, regardless of fluctuating pressure conditions of the system. MODULATION: Full authority flow rate modulation for temperature control; The electrical actuator performs the modulating function changing the section of flow passage. When continuous modulation is carried out, the temperature is kept under control. Cim 776 keeps the same obturator stroke, regardless of the presetting dial position. With continuous modulation, control is excellent even with small flow opening. This eliminate on/off effect. Constant flow is obtained through the valve, despite pressure fluctuations. By simply measuring differential pressure across the valve, the flow through the cartridge is obtained as follows: If measured differential pressure is above p min (start-up pressure), the flow rate is the same as the one stated on the valve table (function) of the pre-set; If measured differential pressure is below minimum p min stated on valve table, flow rate is calculated with one of the following formula: Relative density Fluid r Water 1. Water and glycol 1% 1.12 Water and glycol 2% 1.28 where: Q is the flow rate in m 3 /h, r is the relative density, p is the pressure drop across the valve; Kvs - Kv across the valve when it is fully open (see tables). Water and glycol 3% 1.4 Water and glycol 4% 1.54 Water and glycol 5% 1.67 6
EXAMPLE Q Δpc Δpa It is required to balance the circuit in the figure, the given data are: Circuit pressure drop: p c =1 kpa; Flow rate: Q=.48 m 3 /h=.133 l/s; Maximum head: p a,max = 6 kpa (Pump head); Pipeline size: DN 25. Δp b Δp a = Δpb + Δpc Δp b Pressure drop across Cim 776 Δp c Circuit pressure drop Δp Available pressure for the riser SUGGESTED VALUES AND TIPS: Velocities in the pipeline: Max = 1.15 m/s Min =.75 m/s It is possible to install a valve with the same diameter of the pipe, to avoid fittings installation. Using a Cim 776LF DN25, it is possible to select from the attached tables the pre-set position (1. -.135 l/s). This P.I.C.V. in this conditions needs at least 14 kpa of differential pressure in order to work properly, the available pressure on the riser should be at least: The maximum allowable differential pressure across the balancing valve is 4 kpa, it means that the maximum head at the riser should be: Being the maximum head less than the calculated limit, the installation is correct. For the preliminary sizings where the value of maximum available pressure is not known, it is possible to use the maximum head of the pump directly. 7
2 technological solutions Measurement conversion chart: Pressure FROM MULTIPLY BY TO OBTAIN Pa, Pascal,1 kpa, kilopascal Pa, Pascal,1 MPa, Mega Pascal Pa, Pascal,1 bar Pa, Pascal,1972 m H2O, metres of water Pa, Pascal,14538 psi, pound per square inch bar 1,1325 atm, atmosphere bar,98665 Kg/cm 2, kilograms per square centimetre bar 1,1972 m H2O, metres of water bar 14,538 psi, pound per square inch atm, atmosphere 1,3323 Kg/cm 2, kilograms per square centimetre atm, atmosphere 1,3323 m H2O, metres of water atm, atmosphere 14,6959 psi, pound per square inch Kg/cm 2 1 m H2O, metres of water Kg/cm 2 14,2233 psi, pound per square inch m H2O 1,42233 psi, pound per square inch TO OBTAIN DIVIDE BY FROM Length, Area, Volume, Density FROM MULTIPLY BY TO OBTAIN inches,254 m, metres inches 2,54 cm, centimetres feet,348 m, metres feet 3,48 cm, centimetres yards,9144 m, metres square inches,64516 m 2, metri quadrati square feet,92934 m 2, square metres square inches 6,4516 cm 2, square centimetres square feet 929,34 cm 2, square centimetres square yards,8361274 m 2, square metres l, litres,1 m 3, cubic metres gallons,3789412 m 3, cubic metres cubic yards,7645549 m 3, cubic metres cubic feet,2831685 m 3, cubic metres cubic inches,164 m 3, cubic metres cubic inches 16,3876 cm 3, cubic centimetres cubic feet 28,31685 l, litres gallons 3,875412 l, litres TO OBTAIN DIVIDE BY FROM Pressure-temperature ratings: 29 58 87 116 145 174 23 232 261 29 319 349 377 46 p [lbf/in ] 18 356 16 32 14 284 12 248 T [ C] 1 212 T [ F] 8 176 6 14 4 14 2 38 4 2 6 1 14 18 22 26 8 12 16 2 24 28 32 p [bar] 8
Flow rates - DN 15 Cim 776LF 195 18 165 15 Flow rate - Q (l/h) 135 12 15 9 75 6 45 3 1/2 15 p p min --> Q = Q nom p < p min --> Q = Kvs p,5 1, 1,5 2, 2,5 3, 3,5 4, Pre-Setting Flow Rate Pre-Set.5.75 1. 1.25 1.5 1.75 2. 2.25 2.5 2.75 3. 3.25 3.5 3.75 4. l/h 78 117 156 195 234 274 313 352 391 43 469 58 547 586 625 l/s.22.33.43.54.65.76.87.98.19.119.13.141.152.163.174 GPM.34.52.69.86 1.3 1.2 1.38 1.55 1.72 1.89 2.6 2.24 2.41 2.58 2.75 Min p kpa 14.5 14.5 14.5 15.1 15.1 15.1 15.1 15.7 15.7 15.7 15.7 16. 16. 16. 16. Kvs.21.31.41.5.6.7.81.89.99 1.8 1.18 1.27 1.37 1.47 1.57 9
Flow rates - DN 2 Cim 776LF 195 18 165 15 Flow rate - Q (l/h) 135 12 15 9 75 6 45 3/4 3 15 p p min --> Q = Q nom p < p min --> Q = Kvs p,5 1, 1,5 2, 2,5 3, 3,5 4, Pre-Setting Flow Rate Pre-Set.5.75 1. 1.25 1.5 1.75 2. 2.25 2.5 2.75 3. 3.25 3.5 3.75 4. l/h 131 197 263 328 394 459 525 591 656 722 788 853 919 984 15 l/s.36.55.73.91.19.128.146.164.182.21.219.237.255.273.292 GPM.58.87 1.16 1.44 1.73 2.2 2.31 2.6 2.89 3.18 3.47 3.76 4.4 4.33 4.62 Min p kpa 14.5 14.5 14.5 15.1 15.1 15.1 15.1 15.7 15.7 15.7 15.7 16. 16. 16. 16. Kvs.34.52.69.84 1.1 1.19 1.35 1.49 1.65 1.83 1.99 2.13 2.3 2.46 2.63 1
Flow rates - DN 25 Cim 776LF 195 18 165 15 Flow rate - Q (l/h) 135 12 15 9 75 6 45 1 3 15 p p min --> Q = Q nom p < p min --> Q = Kvs p,5 1, 1,5 2, 2,5 3, 3,5 4, Pre-Setting Flow Rate Pre-Set.5.75 1. 1.25 1.5 1.75 2. 2.25 2.5 2.75 3. 3.25 3.5 3.75 4. l/h 231 357 486 617 749 878 15 1128 1244 1352 1452 154 1615 1676 1722 l/s.64.99.135.171.28.244.279.313.346.376.43.428.449.466.478 GPM 1.2 1.57 2.14 2.72 3.3 3.87 4.43 4.96 5.48 5.95 6.39 6.78 7.11 7.38 7.58 Min p kpa 14. 14. 14. 14.8 14.8 14.8 14.8 15.5 15.5 15.5 15.5 16. 16. 16. 16. Kvs.62.95 1.3 1.6 1.95 2.28 2.61 2.86 3.16 3.44 3.69 3.85 4.4 4.19 4.3 11
Flow rates - DN 15 Cim 776HF 975 9 825 75 Flow rate - Q (l/h) 675 6 525 45 375 3 225 15 1/2 p p min --> Q = Q nom p < p min --> Q = Kvs p 75,5 1, 1,5 2, 2,5 3, 3,5 4, Pre-Setting Flow Rate Pre-Set.5.75 1. 1.25 1.5 1.75 2. 2.25 2.5 2.75 3. 3.25 3.5 3.75 4. l/h 244 372 51 63 759 886 19 1128 1241 1347 1444 1532 169 1673 1724 l/s.68.13.139.175.211.246.28.313.345.374.41.426.447.465.479 GPM 1.8 1.64 2.2 2.77 3.34 3.9 4.44 4.97 5.46 5.93 6.36 6.74 7.8 7.37 7.59 Min p kpa 14. 14. 14. 15.8 15.8 15.8 15.8 17. 17. 17. 17. 18. 18. 18. 18. Kvs.65.99 1.34 1.58 1.91 2.23 2.54 2.73 3.1 3.27 3.5 3.61 3.79 3.95 4.6 12
Flow rates - DN 2 Cim 776HF 975 9 825 75 Flow rate - Q (l/h) 675 6 525 45 375 3 225 3/4 15 75 p p min --> Q = Q nom p < p min --> Q = Kvs p,5 1, 1,5 2, 2,5 3, 3,5 4, Pre-Setting Flow Rate Pre-Set.5.75 1. 1.25 1.5 1.75 2. 2.25 2.5 2.75 3. 3.25 3.5 3.75 4. l/h 292 435 577 719 863 17 1152 1296 1437 1573 17 1815 1913 199 239 l/s.81.121.16.2.24.28.32.36.399.437.472.54.531.553.566 GPM 1.28 1.91 2.54 3.17 3.8 4.43 5.7 5.7 6.33 6.92 7.48 7.99 8.42 8.76 8.98 Min p kpa 14. 14. 14. 18. 18. 18. 18. 2. 2. 2. 2. 22. 22. 22. 22. Kvs.78 1.16 1.54 1.7 2.4 2.38 2.72 2.9 3.21 3.52 3.8 3.87 4.8 4.24 4.34 13
Flow rates - DN 25 Cim 776HF 975 9 825 75 Flow rate - Q (l/h) 675 6 525 45 375 3 225 1 15 75 p p min --> Q = Q nom p < p min --> Q = Kvs p,5 1, 1,5 2, 2,5 3, 3,5 4, Pre-Setting Flow Rate Pre-Set.5.75 1. 1.25 1.5 1.75 2. 2.25 2.5 2.75 3. 3.25 3.5 3.75 4. l/h 292 435 577 719 863 17 1152 1296 1437 1573 17 1815 1913 199 239 l/s.81.121.16.2.24.28.32.36.399.437.472.54.531.553.566 GPM 1.28 1.91 2.54 3.17 3.8 4.43 5.7 5.7 6.33 6.92 7.48 7.99 8.42 8.76 8.98 Min p kpa 14. 14. 14. 18. 18. 18. 18. 2. 2. 2. 2. 22. 22. 22. 22. Kvs.78 1.16 1.54 1.7 2.4 2.38 2.72 2.9 3.21 3.52 3.8 3.87 4.8 4.24 4.34 14
Flow rates - DN 32 Cim 776HF 975 9 825 75 Flow rate - Q (l/h) 675 6 525 45 375 3 225 1 1/4 15 75 p p min --> Q = Q nom p < p min --> Q = Kvs p,5 1, 1,5 2, 2,5 3, 3,5 4, Pre-Setting Flow Rate Pre-Set.5.75 1. 1.25 1.5 1.75 2. 2.25 2.5 2.75 3. 3.25 3.5 3.75 4. l/h 465 692 9221 115 1377 16 1816 224 2221 245 2574 2726 2858 2969 356 l/s.129.192.256.319.382.444.54.562.617.668.715.757.794.825.849 GPM 2.5 3.5 4.5 5.6 6.6 7.4 7.99 8.91 9.78 1.59 11.33 12. 12.58 13.7 13.45 Min p kpa 14.5 14.5 14.5 16. 16. 16. 16. 17. 17. 17. 17. 18. 18. 18. 18. Kvs 1.22 1.82 2.42 2.87 3.44 4. 4.54 4.91 5.39 5.83 6.24 6.42 6.74 7. 7.2 15
Flow rates - DN 4 Cim 776HF 975 9 825 Flow rate - Q (l/h) 75 675 6 525 45 375 3 225 1 1/2 15 75 p p min --> Q = Q nom p < p min --> Q = Kvs p,5 1, 1,5 2, 2,5 3, 3,5 4, Pre-Setting Flow Rate Pre-Set.5.75 1. 1.25 1.5 1.75 2. 2.25 2.5 2.75 3. 3.25 3.5 3.75 4. l/h 222 2825 3538 4179 4758 5279 5741 6139 647 6729 6916 733 79 715 715 l/s.562.785.983 1.161 1.322 1.466 1.595 1.75 1.797 1.869 1.921 1.954 1.969 1.974 1.974 GPM 8.9 12.44 15.58 18.4 2.95 23.24 25.27 27.3 28.48 29.62 3.44 3.96 31.21 31.28 31.28 Min p kpa 16. 16.5 16.5 18. 18. 2. 2. 22. 22.5 24. 25. 26. 26. 26. 26. Kvs 5.6 6.96 8.71 9.85 11.22 11.8 12.84 13.9 13.64 13.73 13.8 13.8 13.9 13.94 13.94 16
Flow rates - DN 5 Cim 776HF 975 9 825 75 2 Flow rate - Q (l/h) 675 6 525 45 375 3 225 p p min --> Q = Q nom p < p min --> Q = Kvs p 15 75,5 1, 1,5 2, 2,5 3, 3,5 4, Pre-Setting Flow Rate Pre-Set.5.75 1. 1.25 1.5 1.75 2. 2.25 2.5 2.75 3. 3.25 3.5 3.75 4. l/h 224 3325 4337 5218 5963 6577 77 7459 7766 89 824 8362 8486 8568 8586 l/s.612.924 1.25 1.449 1.657 1.827 1.964 2.72 2.157 2.225 2.279 2.323 2.357 2.38 2.385 GPM 9.7 14.64 19.9 22.97 26.25 28.95 31.12 32.84 34.19 35.25 36.11 36.81 37.36 37.72 37.8 Min p kpa 19. 22. 22. 25. 25. 28. 28. 29. 29. 3. 3. 31. 32. 32. 32. Kvs 5.5 7.9 9.25 1.43 11.93 12.43 13.36 13.85 14.42 14.62 14.98 15. 15. 15.15 15.18 17
Main dimensions: Cim 776LF Cim 776HF DN 15 2 25 32 4 5 Grms. 875 86 115 146 255 32 A 35 35 35 35 35 35 B 81 81 81 87 12 13 B1 72 72 72 76 87 93 C 96 97 13 128 144 155 D 14 15 16 19 17 2 CH 27 32 39 47 54 69 DN 15 2 25 32 4 5 Grms. 115 1125 1255 155 325 39 A 83 83 83 83 122 122 B 138 138 138 144 235 242 B1 72 72 72 76 87 93 C 96 97 13 128 144 155 D 14 15 16 19 17 2 CH 27 32 39 47 54 69 18
Maintenance: As a rule, the balancing valve does not need any maintenance. In case of replacement or need of disassembling of some components of the valve, f.i. for flushing the cartridge of differential pressure, make sure that the installation is not under service or pressure. 19
2817 San Maurizio d Opaglio (NO) - Italy - Via Torchio, 57 - C.P. 16 Tel. +39 322 9231 - Fax: +39 322 967216 / 967755 skype: cimberiosk1, cimberiosk2 info@cimberio.it www.cimberio.com Copyright - Cav. Uff. GIACOMO CIMBERIO S.p.A. - All rights reserved. Tutti i diritti riservati. IMR 562637 FM 182 SA 551551 EMS 551553 OHS 551552 ENMS 577357