Float valve Type HFI. Data sheet

Transcription

1 Data sheet Float valve ype is a high pressure float valve with internal liquid measuring device. he float valve is designed for direct flange mounting or welding on to plate heat exchanger type condensers, as illustrated in fig 1. is direct acting, therefore no differential pressure is required to activate the valve. is sturdy and reliable owing to its simple design. he float valve is equipped with a purge valve for purging non condensable gases e.g. air from the top of the valve housing. his facility is also useful if the valve has to be serviced. he is available with two external connections on the housing for drainage and pressure equalizations. Features Designed for direct flange mounting on to plate heat exchanger type condensers Can be mounted directly on vessels emperature range: /+80 C ( 58/+176 F) Equipped with purge valve for purging non condensable gasses Available with external connections for drainage and pressure equalizations Maximum operating pressure is 25 bar g (363 psi g) Suitable for R717 (aonia), HCFC and HFC with a density of 0 through 0 kg/m 3 ( lb/ft 3 ). For densities outside this range please contact your local Danfoss sales company. Housing i.e. shell and flange are made of special steel approved for low temperature application Classification: DNV, CRN, BV, EAC etc. o get an updated list of certification on the products please contact your local Danfoss Sales Company. Fig. 1 Danfoss DCS (MWA) AI en-0001 DKRCI.PD.GB0.B4.02 1

2 Design Available connections Flange: Inlet: Flange DN 0 or DN 1 (DIN-2635/DIN 2512-F) Outlet: Welding connection DN (EN 2) Butt-weld, DIN: Inlet: DN 0 or DN 1 (EN 2) Outlet: Welding connection DN (EN 2) Butt-weld, ANSI: Inlet: DN 0 (4 ) or DN 1 (6 ) (ANSI B 36.) Outlet: Welding connection DN (2 ) (ANSI 36.) Housing Housing i.e. shell and flange is made of special steel approved for low temperature operation. Installation Refer to installation instruction for. Identification: Pressure Equipment Directive (PED) he -valves are approved in accordance with the European standard specified in the Pressure Equipment Directive and are CE marked. For further details / restrictions - see Installation Instruction Nominal bore Classified for Catagory valves DN 0 and 1 (4 and 6 ) Fluid group I III echnical data Refrigerants Suitable for R717 (aonia), HCFC and HFC with a density of 0 through 0 kg/m 3 ( lb/ft 3 ). For densities outside this range please contact your local Danfoss sales company. Flaable hydrocarbons are not recoended. For further information please contact your local Danfoss Sales Company. emperature range /+80 C ( 58/+176 F) Pressure he float valve is designed for: Maximum operating pressure: 25 bar g (363 psi g). Strength test without float ball: 42 bar g (609 psi g). Leakage test: 25 bar g (363 psi g). Valves for higher pressure are available on request. he principle of high pressure control Introduction In installations with one application high pressure control is an effective and cost saving way of expanding liquid from the condenser to the low pressure side. High pressure refrigerant entering the condenser will start to condense, consequently condensate will accumulate at the bottom of the condenser and in the float valve. When capacity demands increase, the liquid level in the float valve will rise, which will cause the valve to open and the refrigerant to expand into the separator at the low pressure side. When the valve is closed, there will still be a small by-pass over the seat, so any remaining liquid will equalize slowly to the low pressure side, for instance during an off cycle. herefore the system will equalize automatically and the compressor can start up without excessive back pressure. he of the bypass is pre determined and defined by geometry of the elements. It follows from the above, that almost all the refrigerant will be accumulated on the low pressure side under normal conditions. herefore under normal conditions no high pressure receiver is necessary when using the for high pressure control. Danfoss DCS (MWA) AI en-0001 DKRCI.PD.GB0.B4.02 2

3 Insert for the high pressure float valve Detail A Fully closed Detail B Fully open A Fig. 3 B Fig. 4 Computation and selection In R 717 plants (aonia) On the following pages you will find tables with capacities of the float valve at various operating conditions. Select a valve using the specific operating conditions. he chosen valve must have a capacity higher than the required capacity during nominal operation, as well as during plant start up. In plants using other refrigerants than aonia he capacity of the float valve can be calculated by using the values and the equation to the right. However, the density of the refrigerant must be in the range: 0 to 0 kg/m 3. Valve type Nominal capacity [kw] (R 717, /+35 C) Valve constant [K] 0 FD FD FD For densities outside this range please contact FD 0 your local Danfoss Sales Company. Mass flow G = p = differential pressure [bar] ρ = density of liquid [kg/m 3 ] K = valve constant (from the above table) Danfoss DCS (MWA) AI en-0001 DKRCI.PD.GB0.B4.02 3

4 Computation and selection capacity tables - SI units 0 - R 717, evaporating capacity [kw] temp. ( C) Evaporating temperature ( C) R 717, evaporating capacity [kw] temp. ( C) Evaporating temperature ( C) R 717, evaporating capacity [kw] temp. ( C) Evaporating temperature ( C) R717, evaporating capacity [kw] temp. ( C) Evaporating temperature ( C) Danfoss DCS (MWA) AI en-0001 DKRCI.PD.GB0.B4.02 4

5 Computation and selection capacity tables - US units 0 - R 717, evaporating capacity [R] temp. ( F) Evaporating temperature ( F) R 717, evaporating capacity [R] temp. ( F) Evaporating temperature ( F) R 717, evaporating capacity [R] temp. ( F) Evaporating temperature ( F) R717, evaporating capacity [R] temp. ( F) Evaporating temperature ( F) Danfoss DCS (MWA) AI en-0001 DKRCI.PD.GB0.B4.02 5

6 High pressure control in refrigeration system with condenser/evaporator Fig. 5 shows a water chiller with plate heat exchanger as both condenser and evaporator. is flanged directly on to the condenser. Compressor Vapor Liquid High pressure Float Valve - Fig. 5, Example High pressure condenser Water chiller (evaporator) Danfoss DCS (MWA) AI en-0001 DKRCI.PD.GB0.B4.02 6

7 Material specification Fig. 6 1f 1g e No Part Material DIN/EN ASM 1 Housing: a. Shell b. Flange (shell) c. Flange (inlet) d. Branch (discharge) e. External connection f. Flange (shell) g. Connecting tube P215NL, EN P275 NL1, EN028-3 P285QH EN P275 NL1, EN028-3 P285QH EN P215NL, EN P275 NL1, EN End cover with cylinder P275 NL1, EN Set screw Stainless steel A2-5 ube 6 Gasket Aluminium 7 Purge valve, SNV-S 1 ) 8 Gasket Non asbestos 9 Float Ball 1 ) SNV-S G½-G½ (148B3745). Grade 1, A333, A334 Grade A, A662 LF2A3 Grade A, A662 LF2A3 Grade 1, A333, A334 Grade A, A662 Danfoss DCS (MWA) AI en-0001 DKRCI.PD.GB0.B4.02 7

8 Connections DIN - Outlet Butt-weld DIN (EN 2) Outlet For use with valve type ANSI - Outlet Butt-weld ANSI (B 36. Schedule ) Outlet For use with valve type DIN - Inlet Butt-weld DIN (EN 2) Inlet For use with valve type ANSI - Inlet Butt-weld ANSI (B 36. Schedule ) Inlet For use with valve type Inlet flange bar / DIN 2635 / DIN 2512-F* D b k d 42 d 43 F d 2 Z Size 0 (4 ) Size 1 (6 ) *Inlet flange and DIN outlet 8 pcs. 8 pcs. Danfoss DCS (MWA) AI en-0001 DKRCI.PD.GB0.B4.02 8

9 Dimensions and weights Fig. 7 High pressure float valve without flange (Fig. 7) Valve A 1 A 2 A 3 B C ØD F m Weight kg lb kg lb Specified weights are approximate values only. Fig. 8 High pressure float valve with flange (Fig. 8) Valve A 1 A 2 A 3 B C ØD F m Weight kg lb kg lb Specified weights are approximate values only. Danfoss DCS (MWA) AI en-0001 DKRCI.PD.GB0.B4.02 9

10 Dimensions and weights ( with external connections) External connections EXC2 øe EXC1 Fig. 7 4 High pressure float valve without flange (Fig. 7) Valve A 1 A 2 A 3 A 4 B C ØD ØE F m Weight kg lb kg lb Specified weights are approximate values only. External connections EXC2 øe EXC1 Fig. 8 4 High pressure float valve with flange (Fig. 8) Valve A 1 A 2 A 3 A 4 B C ØD ØE F m Weight kg lb kg lb Specified weights are approximate values only. EXC1 EXC2 3/8-18 NP 1/2-14 NP Danfoss DCS (MWA) AI en-0001 DKRCI.PD.GB0.B4.02

11 Volumes Fig. 9 Internal volume (gross): m 3 (2.17 USgal) Internal volume with float ball: m 3 (1.69 USgal) Liquid volume at max. level: m 3 (1.22 USgal) Liquid volume at m level: m 3 (0.42 USgal) Ordering he table below is used to identify the valve required. Example: 0 D 0 = 148G92 ype Inlet connection Nozzle Code numbers 0 FD 0 148G32 0 FD 0 148G33 0 (4 ) DIN Flange FD G34 FD 0 148G FD 1 148G35 FD 1 1 (6 ) DIN Flange G36 FD 1 148G D 0 148G92 0 D 0 148G93 0 (4 ) DIN BW D G94 D 0 148G D 1 148G95 D 1 1 (6 ) DIN BW G96 D 1 148G A 0 148G97 0 A 0 148G98 0 (4 ) ANSI BW A G99 A 0 148G34 0 A 1 148G A 1 1 (6 ) ANSI BW G31 A 1 148G3421 with 2 external connections FD = inlet flange DIN D = Butt welding DIN A = Butt welding ANSI ype Inlet connection Nozzle Code numbers 0 FD 0 w. 2 ext. con 148G FD 0 w. 2 ext. con 148G (4 ) DIN Flange FD 0 w. 2 ext. con G36 FD 0 w. 2 ext. con 148G FD 1 w. 2 ext. con 148G3762 FD 1 w. 2 ext. con 1 (6 ) DIN Flange G3763 FD 1 w. 2 ext. con 148G D 0 w. 2 ext. con 148G D 0 w. 2 ext. con 148G34 0 (4 ) DIN BW D 0 w. 2 ext. con G3766 D 0 w. 2 ext. con 148G37 0 D 1 w. 2 ext. con 148G3767 D 1 w. 2 ext. con 1 (6 ) DIN BW G3768 D 1 w. 2 ext. con 148G3769 Insert for (complete insert with float ball - without float housing) Insert for ( complete insert with float ball - without float housing) Insert for 0 ( complete insert with float ball - without float housing) Insert for 0 ( complete insert with float ball - without float housing) 148G G G G3661 Danfoss DCS (MWA) AI en-0001 DKRCI.PD.GB0.B

12 Accessories ype Connection type Quantity Code no. Welding nipple incl. aluminium gasket G½-ND6 2 pcs. 148B4184 Al gaskets included 1 / 4 FP ½ G 1 pc. 148B3860 Al gaskets included 3 / 8 G - ½ G 1 pc. 148B3861 Danfoss DCS (MWA) AI en-0001 DKRCI.PD.GB0.B