Level controls
92Pages

High pressure float valve, HFI Contents Page Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346 The principle of high pressure control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346 Insert for the high pressure float valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347 Computation and selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347 High pressure control in refrigeration system with condenser/evaporator . . . . . . . . . . . . . . . . . . . . . . . . . 350 Material specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352 Dimensions and weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353 Volumes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355 Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355 HFI with 2 external connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355

MAKING MODERN LIVING POSSIBLE High pressure float valve HFI HFI is a high pressure float valve with internal liquid measuring device. The float valve is designed for direct flange mounting or welding on to plate heat exchanger type condensers, as illustrated in fig 1. HFI is direct acting, therefore no differential pressure is required to activate the valve. HFI is sturdy and reliable owing to its simple design. The float valve is equipped with a purge valve for purging non condensable gases e.g. air from the top of the valve housing. This facility is also useful if the valve has to be...

High pressure float valve, HFI Design Available connections Flange: Inlet: Flange DN 100 or DN 150 (DIN-2635/DIN 2512-F) Outlet: Welding connection DN 50 (EN 10220) Housing Housing i.e. shell and flange is made of special steel approved for low temperature operation. Butt-weld, DIN: Inlet: DN 100 or DN 150 (EN 10220) Outlet: Welding connection DN 50 (EN 10220) Installation Refer to installation instruction for HFI. Butt-weld, ANSI: Inlet: DN 100 (4 in.) or DN 150 (6 in.) (ANSI B 36.10) Outlet: Welding connection DN 50 (2 in.) (ANSI 36.10) Pressure Equipment Directive (PED) The HFI-valves...

High pressure float valve, HFI Insert for the high pressure float valve Detail B Fully open Detail A Fully closed In R 717 plants (ammonia) On the following pages you will find tables with capacities of the float valve at various operating conditions. In plants using other refrigerants than ammonia The 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: 500 to 700 kg/m3. For densities outside this range please contact your local Danfoss Sales Company. Select a valve using the specific...

High pressure float valve, HFI Computation and selection capacity tables - SI units HFI 040 - R 717, evaporating capacity [kW] Evaporating temperature (°C) HFI 050 - R 717, evaporating capacity [kW] Evaporating temperature (°C) HFI 060 - R 717, evaporating capacity [kW] Evaporating temperature (°C) HFI 070 - R717, evaporating capacity [kW] Condensing temp. (°C)

High pressure float valve, HFI Computation and selection capacity tables - US units HFI 040 - R 717, evaporating capacity [TR] Evaporating temperature (°F) HFI 050 - R 717, evaporating capacity [TR] Evaporating temperature (°F) HFI 060 - R 717, evaporating capacity [TR] Evaporating temperature (°F) HFI 070 - R717, evaporating capacity [TR] Condensing temp. (°F)

High pressure float valve, HFI High pressure control in refrigeration system with condenser/evaporator Fig. 5 shows a water chiller with plate heat exchanger as both condenser and evaporator. HFI is flanged directly on to the condenser. Compressor Vapor Liquid High pressure Float Valve - HFI High pressure condenser Water chiller (evaporator)

High pressure float valve, HFI Material specification Part Material Housing: a. Shell Steel b. Flange (shell) Steel c. Flange (inlet) Steel d. Branch (discharge) Steel e. External connection Steel f. Flange (shell) Steel g. Connecting tube Steel 3 End cover with cylinder Steel 4 Set screw Stainless steel 5 Tube Steel 6 Gasket Aluminium 7 Purge valve, SNV-ST 1) 8 Gasket Non asbestos 9 Float Ball Steel 1 ) for further information please see the technical brochure for SNV-ST valves.

High pressure float valve, HFI Connections DIN - Outlet Butt welding EN10220 Size mm For use with valve type ANSI - Outlet Butt welding ANSI B 36.10 Size mm For use with valve type Butt welding EN 10220 Size mm ANSI - Inlet For use with valve type Butt welding ANSI B 36.10 Size mm Inlet flange Inlet For use with valve type *Inlet flange and DIN outlet