Regulating valves REG-SA and REG-SB

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1 MAKING MODERN LIVING POSSIBLE Technical brochure Regulating valves REG-SA and REG-SB REG-SA and REG-SB are angleway and straightway hand regulating valves, which act as normal stop valves in closed position. The valves are available in two different versions REG-SA is for use in expansion lines (cone type A), while REG-SB is designed for regulation purposes in liquid lines (cone type B). The valves are designed to meet the strict quality requirements on refrigerating installations specified by the international classification societies and are carefully designed to present favourable flow conditions and accurate linear characteristics. REG-SA and REG-SB are equipped with vented cap and internal backseating enables replacement of the spindle seal whilst the valve is active, i.e. under pressure. Features Housing is Standard SVL angleway or straightway housing allowing other inserts from the SVL platform to be installed. Applicable to all coon non-flaable refrigerants and all non-corrosive gases/ liquids. Can be used in chemical and petro-chemical applications. Designed to ensure perfect regulation Internal backseating enables replacement of the spindle seal whilst the valve is active, i.e. under pressure. Easy to disassemble for inspection and possible repair. Max. operating pressure: 5 bar g (75 psi g) Temperature range: 6/+5 C ( 76/+ F) Acts as a normal stop valve in closed position. Housing and bonnet material is low temperature steel according to requirements of the Pressure Equipment Directive and other international classification authorities. Exact capacity and setting of the valve can be calculated for all refrigerants by means of "DIRcalc " (Danfoss Industrial Refrigeration calculation prograe). Classification: To get an updated list of certification on the products please contact your local Danfoss Sales Company. Danfoss A/S (AC.MCI/MWA), -5 DKRCI.PD.KM.A. / 5H69

2 Design Housing Housing is Standard SVA angleway or straightway housing allowing other inserts from the SVL platform to be installed. Material is special, cold resistant steel Connections Available with the following connections: Butt-weld DIN (EN ) DN - 65 ( /8 - ½ ) Butt-weld ANSI (B 6. Schedule 8) DN - ( /8 - ½ ) Butt-weld ANSI (B 6. Schedule ) DN 5-65 ( - ½ ) Socket weld (ANSI B 6.) DN 5 - (½ - ½ ) FPT inside pipe thread, NPT (ANSI/ASME B..) DN 5 - (½ - ¼ ) The cone The valves are available in two different versions REG-SA with an A cone and REG- SB with a B cone. The A cone is designed for expansion lines, while the B cone is designed for regulating purposes e.g. liquid lines. The valve cone is designed to ensure perfect regulation and provide an extensive regulating area. Irrespective of the refrigerant used, it is easy to obtain the correct capacity. A cone seal ring provides perfect sealing at a minimum closing momentum. The valve cone can be turned on the spindle, thus there will be no friction between the cone and the seat when the valve is opened and closed. Spindle The spindle is made of polished stainless steel, which is ideal for O-ring sealing. Packing gland - REG-SA and REG-SB The full temperature range packing gland ensures perfect tightness in the whole range: 6/+5 C ( 76/+ F). The packing glands are equipped with a scraper ring to prevent penetration of dirt and ice. Installation Install the valve with the spindle up or in horizontal position. The flow must be directed towards the cone. The valve is designed to withstand high internal pressure. However, the piping system in general should be designed to avoid liquid traps and reduce the risk of hydraulic pressure caused by thermal expansion. For further information refer to product instruction for REG-SA and REG-SB. Example of marking ring, REG-SA Pressure Equipment Directive (PED) REG valves are approved according to the European standard specified in the Pressure Equipment Directive and are CE marked. REG-SA and REG-SB valves Nominal bore DN = < 5 ( ) DN-8 (¼ - ) DN - 5 ( - 5 ) Classified for Fluid group I Category Article, paragraph II III Technical data Refrigerants Applicable to all coon non-flaable refrigerants and all non-corrosive gases/ liquids. Can be used in chemical and petro-chemical applications. Temperature range 6/+5 C ( 76/+ F) Max working pressure 5 bar g (75 psi g) Flow coefficients Flow coefficients for fully opened valves from kv =.5 to 8 m /h (Cv =.7 to 9.5 USgal/ min). DKRCI.PD.KM.A. / 5H69 Danfoss A/S (AC.MCI/MWA), -5

3 Computation and selection Introduction In refrigeration plants, regulating valves are primarily used in liquid lines in order to regulate the flow of refrigerant. The valves can, however, also be used as expansion valves. From a calculation point of view the two fields of application are very different. Normal flow is the term used to describe the general case where the flow through the valve is proportional to the square root of the pressure drop across it and inversely proportional to the density of the refrigerant (Bernouillis equation). This relationship between mass flow, pressure drop and density satisfies the majority of all valve applications with refrigerants and brines. Normal flow is characterised by turbulent flow through the valve without any phase change. The following capacity curves are based on the above mentioned assumption. Application of the regulating valves outside the normal flow area will reduce the capacity of the valve considerably. In such cases it is recoended to use "DIRcalc " (Danfoss Industrial Refrigeration calculation prograe). Location of valve in system (marked with grey) Hot gas by-pass & defrost line Wet suction line Dry suction line Discharge line REG Liquid line without phase change Liquid line with or without phase change Sizing regulating valve for liquid flow Liquid refrigerants: Use the liquid tables, fig For other refrigerants and brines, "Normal flow" (Turbulent flow); see below and use the flow coefficient tables (fig. - 5). SI-units Mass flow: Imperial units Mass flow: Volume flow: Volume flow: kv [m /h] Quantity [m /h] of water flowing through a valve at a pressure loss of bar (according to VDE/VDI Norm 7). P [bar] Pressure before the valve (upstream). P [bar] Pressure after the valve (downstream). p [bar] Actual pressure loss across the valve (P P). G [kg/h] Mass flow through the valve. [m /h] Volume flow through the valve. ρ [kg/m ] Density of the refrigerant before the valve. CA Calculation factor (fig. ). Cv [US gal/min] Quantity [US gal/min] of water flowing through a valve at a pressure loss of psi. P [psi] Pressure before the valve (upstream). P [psi] Pressure after the valve (downstream). p [psi] Actual pressure loss across the valve (P P). G [lb/min] Mass flow through the valve. [US gal/min] Volume flow through the valve. ρ [lb/ft ] Density of the refrigerant before the valve CA Calculation factor (fig. ). Danfoss A/S (AC.MCI/MWA), -5 DKRCI.PD.KM.A. / 5H69

4 Computation and selection Flow coefficient K v (C v ).6 (.7) REG-SA and REG-SB B.5 (.58). (.6). (.5). (.). (.) A Fig % 5% 5% 75% % Turn of spindle Opening Flow coefficient Fig. K v (C v ) 5 (5.8).5 (5.) (.6).5 (.6) (.8).5 (.9) (.).5 (.7) (.6).5 (.58) REG-SA 5- and REG-SB 5- B A Turn of spindle % 5% 5% 75% % Opening DKRCI.PD.KM.A. / 5H69 Danfoss A/S (AC.MCI/MWA), -5

5 Computation and selection (Continued) Flow coefficient Fig. K v (C v ) REG-SA 5- and REG-SB 5- B (.) 8 (.88) 6 (8.56) (6.) (.9) (.6) 8 (9.8) A 6 (6.96) (.6) (.) Turn of spindle % 5% 5% 75% % Opening Flow coefficient K v (C v ) 5 (5.) (6.) 5 (.6) (.8) 5 (9.) (.) 5 (7.) (.6) 5 (5.8) REG-SB 5 B Fig % 5% 5% 75% % Turn of spindle Opening Danfoss A/S (AC.MCI/MWA), -5 DKRCI.PD.KM.A. / 5H69 5

6 Computation and selection (Continued) Flow coefficient K v (C v ) 8 (9.8) 7 (8.) 6 (69.6) 5 (58.) (6.) (.8) (.) (.6) REG-SB 65 B Fig % 5% 5% 75% % Turn of spindle Opening 6 DKRCI.PD.KM.A. / 5H69 Danfoss A/S (AC.MCI/MWA), -5

7 Computation and selection (Continued) Liquid R 77, density: 67 kg/m [ lb/ft ] kg/h (lb/min) 8 (9.) REG-SA and REG-SB P = bar (9 psi) P =.5 bar ( psi) P = bar ( psi) (.7) P =.5 bar (7 psi) % R77 5% 5 5% % 8 Turn of spindle A B % Opening Fig. 6 kg/h (lb/min) 8 (9) (7) REG-SA 5- and REG-SB 5- P = bar (9 psi) P =.5 bar ( psi) P = bar ( psi) P =.5 bar (7 psi) R77 % 5% 5% 75% 8 9 Turn of spindle % For choice of valve size and connection see "Connections". Turn of spindle A B Opening Fig. 7 Danfoss A/S (AC.MCI/MWA), -5 DKRCI.PD.KM.A. / 5H69 7

8 Computation and selection (Continued) Liquid R 77, density: 67 kg/m [ lb/ft ] kg/h (lb/min) () (75) (68) REG-SA 5- and REG-SB 5- P = bar (9 psi) P =.5 bar ( psi) P = bar ( psi) P =.5 bar (7 psi) % R77 5% % % Turn of spindle A B % Opening Fig. 8 For choice of valve size and connection see "Connections". kg/h (lb/min) 6 (6) 5 (65) () 5 (55) REG-SB 5 R77 P = bar (9 psi) P =.5 bar ( psi) P = bar ( psi) P =.5 bar (7 psi) % Opening Turn of spindle B % 5% 5% 75% Fig. 9 8 DKRCI.PD.KM.A. / 5H69 Danfoss A/S (AC.MCI/MWA), -5

9 Computation and selection (Continued) Liquid R 77, density: 67 kg/m [ lb/ft ] kg/h (lb/min) (676) 75 (757) 5 (88) 5 (99) REG-SB 65 P = bar (9 psi) P =.5 bar ( psi) P = bar ( psi) P =.5 bar (7 psi) R77 5 % Opening Turn of spindle B % 5% 5% 75% Fig. Calculation factor CA For choice of valve size and connection see "Connections". Fig. Danfoss A/S (AC.MCI/MWA), -5 DKRCI.PD.KM.A. / 5H69 9

10 Computation and selection Example. Refrigerant: R 77 Refrigerant flow: kg/h Pressure drop: p =.5 bar The above mentioned example is illustrated on the following flow rate diagram and shows that REG-SB 5 and with cone B can be used. The main rule is that nominal regulation range should be below 85% opening degree. If the arrowline is crossing cone curves, the smaller cone should be selected if opening degree < 85%. Flow rate diagram The example is only correct if the density of the refrigerant is approx. 67 (kg/m ), and there must be no build-up of flash gas in the valve. kg/h (lb/min) 8 (9) (7) (8) REG-SA 5- and REG-SB 5- R77 P = bar (9 psi) P =.5 bar ( psi) P = bar ( psi) P =.5 bar (7 psi) % 5% 5% 75% 8 Turn of spindle 9 Turn of spindle A B % Opening Fig. DKRCI.PD.KM.A. / 5H69 Danfoss A/S (AC.MCI/MWA), -5

11 Computation and selection Example. Brine, density ρ: 5 [kg/m ] Brine flow G:,7 [kg/h] Pressure drop p:.5 [bar] In this example it is not possible to use the selection diagrams (fig. 6 - ) as the refrigerant in question is not included. Calculation example: Use the curves of the kv-values instead (fig. - 5) and calculate the required kv by means of the formulas in the "Introduction" passage at the beginning of this chapter. Alternatively calculate the kv-values by means of the calculation factor CA (fig. ) and the flow rate diagram (in this example: fig. ) as per the following calculation example. Required kv-value CA =. (from fig. 8) kv = CA G kv =.,7 [kg/h] =.56 [m /h] Calculation factor CA Density kg/m [lb/ft] Fig. Flow rate diagram.56 m /h (from calculation above) Kv (Cv) 5 (5.8).5 (5.) (.6).5 (.6) (.8).5 (.9) (.).5 (.7) (.6).5 (.58) B A Turn of spindle % 5% 5% 75% % Opening REG-SB 5 and REG-SB with cone B can be used. Fig. Danfoss A/S (AC.MCI/MWA), -5 DKRCI.PD.KM.A. / 5H69

12 Material specification REG-SA and REG-SB REG-SA and REG-SB 5 - REG-SA and REG-SB 5-65 Danfoss M8B9_ 7 Danfoss M8B_ 7 Danfoss M8B_ No. Part Material EN ISO ASTM Housing Steel P85QH EN- DN - ( /8 - ½ ) Bonnet, Flange DN - (¼ - ½ ) Bonnet, Insert DN 5-65 ( - ½ ) Bonnet, Flange Spindle DN - (¼ - ½ ) DN 5-65 ( - ½ ) Steel Steel 5 Cone Steel Stainless steel Stainless steel 7 Packing washer Aluminium 8 Packing gland Steel 9 O-ring Cloroprene (Neoprene) Spring loaded Teflon ring PTFE O-ring Cloroprene (Neoprene) P75 NLI EN8- P85QH EN- XCrNiS8-9, 7 X8CrNiS8-9, 7 Type 7, 68/ Type 7, 68/ LFA5 AISI AISI Bolts Stainless steel A-7 A-7 Type 8 Gasket Fiber, non asbestos Bottom insert Steel 7 Seal cap Aluminium 8 Gasket f. seal cap Nylon 9 Locking nut Steel Screw Steel Disk spring Steel DKRCI.PD.KM.A. / 5H69 Danfoss A/S (AC.MCI/MWA), -5

13 Connections Size Size OD T OD T Cone DIN Welding DIN (EN ) REG-SA / SB / A and B REG-SA / SB REG-SA / SB 5 5 / / / / A and B A and B REG-SB B REG-SB 65 / B ANSI Welding ANSI (B 6. Schedule 8) REG-SA / SB / A and B REG-SA / SB REG-SA / SB 5 5 / / / / A and B A and B Welding ANSI (B 6. Schedule ) REG-SB B REG-SB 65 / B Size Size ID T ID T L L Cone SOC Socket welding ANSI (B 6.) REG-SA / SB 5 / / A and B REG-SA / SB 5 / / A and B FPT Size Size Inside pipe thread FPT inside pipe thread, NPT (ANSI/ASME B..) REG-SA / SB REG-SA / SB 5 5 / / / ( / NPT) ( / NPT) (.5 NPT) ( /.5 NPT) Cone A and B A and B Danfoss A/S (AC.MCI/MWA), -5 DKRCI.PD.KM.A. / 5H69

14 Dimensions and weights REG-SA and REG-SB - 65 in angleway version REG-SA and REG-SB REG-SA and REG-SB 5 - REG-SB 5-65 Valve size C G D H Weight REG-SA/SB REG-SA/SB ( /8) kg.8 lb REG-SA/SB 5- REG-SA/SB (½- /) kg. lb REG-SA/SB 5- REG-SA/SB (-½) kg 5. lb REG-SB 5 REG-SB ( ) REG-SB 65 REG-SB (½ ) kg 7. lb.8 kg.6 lb REG-SA/SB SOC REG-SA/SB (¼ ) SOC REG-SA/SB SOC REG-SA/SB (½ ) SOC REG-SB 5 SOC REG-SB ( ) SOC kg 6. lb.9 kg 6. lb. kg 9. lb Specified weights are approximate values only. DKRCI.PD.KM.A. / 5H69 Danfoss A/S (AC.MCI/MWA), -5

15 Dimensions and weights (cont.) REG-SA and REG-SB - in straightway version REG-SA and REG-SB REG-SA and REG-SB 5 - REG-SB 5-65 E Danfoss M8B_ Valve size C B E G D H Weight REG-SA/SB REG-SA/SB ( /8) kg.8 lb REG-SA/SB 5- REG-SA/SB (½- /) kg. lb REG-SA/SB 5- REG-SA/SB (-½) kg 6.6 lb REG-SB 5 REG-SB ( ) REG-SB 65 REG-SB (½ ) kg 9. lb 6. kg.9 lb REG SOC REG (¼) SOC REG SOC REG (½) SOC REG-SB 5 SOC REG-SB ( ) SOC kg 6.6 lb. kg 6.6 lb 5. kg. lb Specified weights are approximate values only. Danfoss A/S (AC.MCI/MWA), -5 DKRCI.PD.KM.A. / 5H69 5

16 Ordering How to order The table below is used to indentify the valve required. Please note that the type codes only serve to identify the valves, some of which may not form part of the standard product range. For further information please contact your local Danfoss Sales Company. Type codes Valve type REG Regulating Valves Nominal size in (Valve size measured on the connection diameter) Available connection types A D SOC FPT DN x x 5 DN 5 x x x x DN x x x x DN 5 DN 5 x x x x DN x x x x DN x x x 5 DN 5 x x 65 DN 65 x x Connections A Welding branches: ANSI B 6. schedule 8, 5 - (½ - ½ ) Welding branches: ANSI B 6. schedule, 5-65 ( - ½ ) D Welding branches: EN SOC Socket weld: ANSI B 6. FPT Valve housing ANG Angle flow Cone A Cone B STR Size: DN DN 5 DN DN 5 DN DN Size: DN DN 5 DN DN 5 DN DN DN 5 DN 65 NPT inside pipe thread: ANSI/ASME B.. Straight flow Flow area [ ] Flow area [ ] Available combination between valve size, cone type and valve connection Size = available DN ( /8") DN 5 (½") DN ( /") DN ( 7 /8") DN 5 (") DN ( /") DN (½") DN 5 (") DN 65 (½") Cone type A B A B A B A B A B A B A B A B A B DIN ANSI SOC FPT 6 DKRCI.PD.KM.A. / 5H69 Danfoss A/S (AC.MCI/MWA), -5

17 Ordering (continued) Example: REG-SA (Cone A) 5 DIN angleway = 8B56 Important! Where products need to be certified according to specific certification societies or where higher pressures are required, the relevant information should be included at the time of order. REG-SA (Cone type A) Butt-weld DIN (EN ) Angleway - REG-SA with cone type A /8 REG-SA D ANG 8B5 5 / REG-SA 5 D ANG 8B56 / REG-SA D ANG 8B56 5 REG-SA 5 D ANG 8B56 / REG-SA D ANG 8B557 / REG-SA D ANG 8B567 Butt-weld DIN (EN ) Straightway - REG-SA with cone type A /8 REG-SA D STR 8B5 5 / REG-SA 5 D STR 8B58 / REG-SA D STR 8B58 5 REG-SA 5 D STR 8B58 / REG-SA D STR 8B558 / REG-SA D STR 8B569 Butt-weld ANSI (B 6. Schedule 8) Angleway - REG-SA with cone type A /8 REG-SA A ANG 8B56 5 / REG-SA 5 A ANG 8B5 / REG-SA A ANG 8B5 5 REG-SA 5 A ANG 8B5 / REG-SA A ANG 8B55 / REG-SA A ANG 8B56 Butt-weld ANSI (B 6. Schedule 8) Straightway - REG-SA with cone type A /8 REG-SA A STR 8B56 5 / REG-SA 5 A STR 8B5 / REG-SA A STR 8B5 5 REG-SA 5 A STR 8B5 / REG-SA A STR 8B55 / REG-SA A STR 8B56 Socket welding ANSI (B 6.) Angleway - REG-SA with cone type A 5 / REG-SA 5 SOC ANG 8B5 / REG-SA SOC ANG 8B5 5 REG-SA 5 SOC ANG 8B5 / REG-SA SOC ANG 8B55 / REG-SA SOC ANG 8B56 Socket welding ANSI (B 6.) Straightway - REG-SA with cone type A 5 / REG-SA 5 SOC STR 8B5 / REG-SA SOC STR 8B5 5 REG-SA 5 SOC STR 8B5 / REG-SA SOC STR 8B55 / REG-SA SOC STR 8B56 D A SOC FPT = Butt-weld DIN = Butt-weld ANSI = Socket weld = Inside pipe thread ANG = Angleway STR = Straightway FPT inside pipe thread, NPT (ANSI/ASME B..) Angleway - REG-SA with cone type A 5 / REG-SA 5 FTP ANG 8B56 / REG-SA FTP ANG 8B56 5 REG-SA 5 FTP ANG 8B56 / REG-SA FTP ANG 8B556 FPT inside pipe thread, NPT (ANSI/ASME B..) Straightway - REG-SA with cone type A 5 / REG-SA 5 FTP STR 8B56 / REG-SA FTP STR 8B56 5 REG-SA 5 FTP STR 8B56 / REG-SA FTP STR 8B556 Danfoss A/S (AC.MCI/MWA), -5 DKRCI.PD.KM.A. / 5H69 7

18 Ordering (continued) Example: REG-SB (Cone B) 5 DIN angleway = 8B57 Important! Where products need to be certified according to specific certification societies or where higher pressures are required, the relevant information should be included at the time of order. REG-SB (Cone type B) Butt-weld DIN (EN ) Angleway - REG-SB with cone type B /8 REG-SB D ANG 8B5 5 / REG-SB 5 D ANG 8B57 / REG-SB D ANG 8B57 5 REG-SB 5 D ANG 8B57 / REG-SB D ANG 8B556 / REG-SB D ANG 8B566 5 REG-SB 5 D ANG 8B / REG-SB 65 D ANG 8B586 Butt-weld DIN (EN ) Straightway - REG-SB with cone type B /8 REG-SB D STR 8B55 5 / REG-SB 5 D STR 8B59 / REG-SB D STR 8B59 5 REG-SB 5 D STR 8B59 / REG-SB D STR 8B559 / REG-SB D STR 8B568 Butt-weld ANSI (B 6. Schedule 8) Angleway - REG-SB with cone type B /8 REG-SB A ANG 8B57 5 / REG-SB 5 A ANG 8B5 / REG-SB A ANG 8B5 5 REG-SB 5 A ANG 8B5 / REG-SB A ANG 8B55 / REG-SB A ANG 8B56 Butt-weld ANSI (B 6. Schedule 8) Straightway - REG-SB with cone type B /8 REG-SB A STR 8B57 5 / REG-SB 5 A STR 8B5 / REG-SB A STR 8B5 5 REG-SB 5 A STR 8B5 / REG-SB A STR 8B55 / REG-SB A STR 8B56 Butt-weld ANSI (B 6. Schedule ) Angleway - REG-SB with cone type B 5 REG-SB 5 A ANG 8B / REG-SB 65 A ANG 8B586 Butt-weld ANSI (B 6. Schedule ) Angleway - REG-SB with cone type B 5 REG-SB 5 A STR 8B57 65 / REG-SB 65 A STR 8B589 Socket welding ANSI (B 6.) Angleway - REG-SB with cone type B 5 / REG-SB 5 SOC ANG 8B55 / REG-SB SOC ANG 8B55 5 REG-SB 5 SOC ANG 8B55 / REG-SB SOC ANG 8B555 / REG-SB SOC ANG 8B565 5 REG-SB 5 SOC ANG 8B577 Socket welding ANSI (B 6.) Straightway - REG-SB with cone type B 5 / REG-SB 5 SOC STR 8B55 / REG-SB SOC STR 8B55 5 REG-SB 5 SOC STR 8B55 / REG-SB SOC STR 8B555 / REG-SB SOC STR 8B565 5 REG-SB 5 SOC STR 8B575 D A SOC FPT = Butt-weld DIN = Butt-weld ANSI = Socket weld = Inside pipe thread ANG = Angleway STR = Straightway FPT inside pipe thread, NPT (ANSI/ASME B..) Angleway - REG-SB with cone type B 5 / REG-SB 5 FTP ANG 8B57 / REG-SB FTP ANG 8B57 5 REG-SB 5 FTP ANG 8B57 / REG-SB FTP ANG 8B557 FPT inside pipe thread, NPT (ANSI/ASME B..) Straightway - REG-SB with cone type B 5 / REG-SB 5 FTP STR 8B57 / REG-SB FTP STR 8B57 5 REG-SB 5 FTP STR 8B57 / REG-SB FTP STR 8B557 8 DKRCI.PD.KM.A. / 5H69 Danfoss A/S (AC.MCI/MWA), -5

19 Danfoss A/S (AC.MCI/MWA), -5 DKRCI.PD.KM.A. / 5H69 9

20 DKRCI.PD.KM.A. / 5H69 Danfoss A/S (AC.MCI/MWA), -5

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