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Screw Chiller (Air Cooled Water Chiller)

Screw Chiller (Air Cooled Water Chiller)

  • Cooling Capacity from 30 TR to 100 TR Energy Efficient Central Chilling Plant.
  • Provide chilled fluid for industrial application from a central location with the Swift Air Cooled SK series central chillers.
  • Simple design of screw compressors provide both full load and part load efficiencies unmatched in the industry, and result in lower energy costs when compared to reciprocating compressors.
Unique Features
  • Rugged compressor design with only four moving parts eliminating the need for pistons, connecting road, wrist pins and valve. Less moving parts means less internal friction and greater efficiency
  • Semi hermitic screw compressors with two shaft designs with suction and discharge solder connection, integrated check valve, integrated pressure relief valves, flanged on oil separator, oil heater, oil filter and oil sight glass
  • All chilled water contact surfaces are non ferrous for protections against corrosion. All wetted surfaces are stainless steel, copper or other non ferrous material
  • Small unit size, factory wired, easy lifting procedure, easy start up logic
  • Stainless steel shell & tube evaporator with Seamless internally finned copper tubes for higher surface area
  • Strainer protects the evaporator from solid contaminations in the process water
  • Flow switch is used detect flow loss as a safety of evaporator when return flow is low
  • Electronic expansion valve is used to regulate the flow of refrigerant in the evaporator as per the load of system to maintain the suction superheat
  • Finned and tube heat exchanger with internally grooved imported copper tubes having higher surface area suitable for ambient condition
  • Removable cartridge type filter dryer to ensure moisture free system and quick change features
  • Sight glass indicates the status of dry or moist system
  • Pressure switch protects the compressor against low and high pressure
  • Monitoring of suction and discharge refrigerant pressures
  • Antifreeze protection to safe guard the evaporator & compressor against low temperature
  • Option of eco friendly refrigerant (R134a) also available
  • Helical screw design result in part load performance
  • Only four moving parts when compared to reciprocating compressors; there are no pistons, connecting rods, suction an discharge valve or mechanical oil pump
  • Latest heat transfer technology result in increased condenser and evaporator tube efficiency
  • Reduced rotor clearance result in reduced leakage between the high and low pressure cavities during compression
  • Resistant to liquid slugging this compressor design can handle amounts of liquid refrigerant that would severely damage a reciprocating compressor
Screw Chiller (Air Cooled Water Chiller)
  • PLC Based Control with Touchscreen HMI
  • Infinite (Stepless) capacity control - 25% to 100%
  • Limit compressor operation with smart safety controls, avoiding compressor or evaporator failures
  • Built-in chiller flow protection automatically detect no-water flow condition
  • Improved chiller start-up, load limiting
  • Chiller capacity algorithm optimizes set point control and evaporator freeze protection
  • PLC based control includes touch screen of 4.3" with thin film transitor
  • Display, onboard view of P & I diagram, status of all critical component, capacity to record last 50 alarm, battery backed up memory that read out set value, actual outlet temperature, inlet water temperature and fault indication
  • Isolated switch cabinet with all necessary switches, power control, overload protection, short protections, over voltage and under voltage protection
  • Fault indication with audio visual alarm
  • Ability to monitor actual capacity usage of compressor with bar graph
  • High performance, low maintenance system with switching cycle control
Technical Specification
Model SK-40 SK-40 (R134a) SK-50 SK-50 (R134a) SK-60
P Performance Characteristics Nominal Capacity* KW (TR) 134.8 (38.3) 118 (33.56) 169 (48) 136.3 (38.7) 219 (62.2)
Compressor Quality/KW 1 / 42.8 1 / 32.4 1 / 53.1 1 / 35.8 1 / 69.9
Refrigerant R22 R 134a R22 R 134a R22
Standard Evaporator Pump / Process Pump KW 5.5 4 5.5 5.5 7.5
Maximum Flow to Evaporator / Process LPM 480 380 480 480 880
Maximum Pressure Bar 5.6 5.3 5.6 5.6 5.4
Water Reservoir Capacity Liters 400 400 400 400 900
Fan Quantity X Fan Kw 2 X 2.2 2 X 2.48
Dimension W X D X H (mm) - Main Unit
W - Width 1707 1707 1707 1707 1861
D - Depth 2811 2811 2811 2811 3800
H - Height 2811 2811 2811 2811 3800
Process Connections
Process Connections Inlet / Outlet-BSP-Inch 2 BSP Female Thread 3 BSP Female Thread 4 BSP Female Thread
Weight (Kg)
Installed (NET) 2100 2850
Voltage 415v, 50Hz, 3
Connected Load 52.7 40.8 63.56 46.26 84.84
Control Voltage 24V DC
Control Range In Deg +8 To +30
Model SK-60 (R134a) SK-80 SK-80 (R134a) SK-100 SK-100 (R134a)
P Performance Characteristics Nominal Capacity* KW (TR) 193.2 (54.9) 297 (84.4) 259 (73.6) 338 (96) 300 (85.3)
Compressor Quality/KW 1 / 56.5 1 / 88.8 1 / 69.3 1 / 101.2 1 / 78.8
Refrigerant R 134a R22 R 134a R22 R 134a
Standard Evaporator Pump / Process Pump KW 7.5 7.5 7.5 15
Maximum Flow to Evaporator / Process LPM 880 880 960 960 1380
Maximum Pressure Bar 4.5 4.8 4.8 4.8 5.6
Water Reservoir Capacity Liters 900 1200 900 1200 900
Fan Quantity X Fan Kw 4 X 2.2 4 X 2.2
Dimension W X D X H (mm) - Main Unit
W - Width 1707 1707 1707 1707 1861
D - Depth 2811 2811 2811 2811 3800
H - Height 2811 2811 2811 2811 3800
Process Connections
Process Connections Inlet / Outlet-BSP-Inch 2 BSP Female Thread 3 BSP Female Thread 4 BSP Female Thread
Weight (Kg)
Installed (NET) 2100 2850
Voltage 415v, 50Hz, 3
Connected Load 52.7 40.8 63.56 46.26 84.84
Control Voltage 24V DC
Control Range In Deg +8 To +30