PRESTO W91tt Process System

11 kW cooling capacity for dynamic temperature changes down to -91 °C

Best heating performance combined with high cooling capacity – those are the key features of the W91 systems. These models are just as ready for embedding into pilot plants as they are for use in material and component testing.

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Data based on voltage version:
400V/3PNPE/50Hz (Without Plug)
W91tt
Order No. 9 421 912.TT.07
Working temperature range -91.0 ... +250.0 °C
Temperature stability ±0.05 ... ±0.2 °C
Heating capacity 36 kW
Cooling capacity
(Medium: Ethanol)
°C
kW
200 100 20 0 -20 -30 -40 -60 -80
11 11 11 11 11 10.5 10.5 8 2
Cooling capacity
(Medium: Ethanol)
°C 200 100 20 0 -20 -30 -40 -60 -80
kW 11 11 11 11 11 10.5 10.5 8 2
Pump capacity flow rate 26 ... 80 l/min
Pump capacity flow pressure 0.5 ... 3 bar
Dimensions
(W × L × H)
95 x 127 x 190 cm
W91tt
Order No. 9 421 912.TT.17
Working temperature range -91.0 ... +250.0 °C
Temperature stability ±0.05 ... ±0.2 °C
Heating capacity 36 kW
Cooling capacity
(Medium: Ethanol)
°C
kW
200 100 20 0 -20 -30 -40 -60 -80
11 11 11 11 11 10.5 10.5 8 2
Cooling capacity
(Medium: Ethanol)
°C 200 100 20 0 -20 -30 -40 -60 -80
kW 11 11 11 11 11 10.5 10.5 8 2
Pump capacity flow rate 26 ... 80 l/min
Pump capacity flow pressure 0.5 ... 3 bar
Dimensions
(W × L × H)
95 x 127 x 190 cm

Product Features

  • Rapid heating and cooling
  • Wide working temperature ranges using one bath fluid
  • Designed to quickly compensate exothermic and endothermic reactions
  • Unsurpassed power and efficiency
  • Heating capacity up to 36 kW
  • Ambient temperature range +5 °C to +40 °C
  • Space optimized design creates more room directly next to the units
  • Integrated 5.7” industrial color touchscreen displays all essential information and enables simple fingertip control
  • Extensive warning, protection, and monitoring functions with detailed self-explanatory messages
  • ICC cascade control for extraordinary precision, temperature stability ±0.05 °C … ±0.2 °C
  • Integrated programmer
  • Electronic level indication
  • Powerful circulating pumps, select a stage or a specific pressure
  • SD-Card slot
  • Connections for USB, Ethernet, RS232, and Alarm output
  • Optional analog connections, RS485, Profibus DP, Modbus
  • Cooling capacity up to 11 kW
  • Pump pressure up to 5.5 bar, max. flow rate 80 l/min
  • Temperature stability ±0.05 °C ... ±0.2 °C
  • Intelligent warning and safety functions
Dimensions and volumes
Dimensions
(W × L × H)
95 x 127 x 190 cm
Internal usable expansion volume 40 l
Minimal process volume 28 l
Active heat exchanger volume 16 l
Weight 870 kg
Pump connections M38x1.5  male
Cooling Water Connection G¾ in
Temperature values
Working temperature range -91.0 ... +250.0 °C
Temperature stability ±0.05 ... ±0.2 °C
Setting the resolution of the temperature display 0.01 °C
Temperature display resolution 0.01 °C
Ambient temperature +5.0 ... +40.0 °C
Data based on voltage version:
400V/3PNPE/50Hz (Without Plug)
Performance values
Heating capacity 36 kW
Cooling capacity
(Medium: Ethanol)
°C
kW
200 100 20 0 -20 -30 -40 -60 -80
11 11 11 11 11 10.5 10.5 8 2
Cooling capacity
(Medium: Ethanol)
°C 200 100 20 0 -20 -30 -40 -60 -80
kW 11 11 11 11 11 10.5 10.5 8 2
Pump capacity flow rate 26 ... 80 l/min
Pump capacity flow pressure 0.5 ... 3 bar
Viscosity max. 50 cST
Refrigerant stage 1
Refrigerant R404A
Global Warming Potential for R404A 3922
Filling volume 4500 g
Carbon dioxide equivalent 17.649 t
Refrigerant stage 2
Refrigerant R23
Global Warming Potential for R23 14800
Filling volume 1250 g
Carbon dioxide equivalent 18.5 t
Performance values
Heating capacity 36 kW
Cooling capacity
(Medium: Ethanol)
°C
kW
200 100 20 0 -20 -30 -40 -60 -80
11 11 11 11 11 10.5 10.5 8 2
Cooling capacity
(Medium: Ethanol)
°C 200 100 20 0 -20 -30 -40 -60 -80
kW 11 11 11 11 11 10.5 10.5 8 2
Pump capacity flow rate 26 ... 80 l/min
Pump capacity flow pressure 0.5 ... 3 bar
Viscosity max. 50 cST
Refrigerant stage 1
Refrigerant R404A
Global Warming Potential for R404A 3922
Filling volume 4500 g
Carbon dioxide equivalent 17.649 t
Refrigerant stage 2
Refrigerant R23
Global Warming Potential for R23 14800
Filling volume 1250 g
Carbon dioxide equivalent 18.5 t
Cooling
Cooling of compressor 2-stage Water
Cooling water pressure max. 6 ... 5.5 bar
Cooling water difference pressure 0.5 bar
Cooling water temperature max. 30 °C
Cooling water consumption 16 ... 43 l/min
Other
Sound pressure level 74 dbA
Classification
according to DIN12876-1
Classification III (FL)
IP Code
according to IEC 60529
IP 21
Pump type Centrifugal Pump (Magnetically coupled)
Electronics
External pt100 sensor connection integrated
2nd external Pt100 sensor connection accessory
Integrated programmer 8x60 steps
Temperature control ICC
Absolute temperature calibration 3 Point Calibration
Temperature display 5.7" TFT Touchscreen
Temperature setting Touchscreen
Available voltage versions
400V/3PNPE/50Hz Without Plug 9421912.07
480V/3P(N)PE/60Hz Without Plug 9421912.17

Accessory for PRESTO W91tt

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Benefits

  • TCF
    Touch display. Perfect operation.
    With the touch display, the user always has an overview of all values and functions. The intuitive and multilingual menu structure enables perfect control.
  • TCF
    Convenience for several users
    Administrator level for customizing instrument settings, user levels with limited permissions for fast and safe defined access, password protection, all levels adjustable
  • ACC
    100 % Cooling capacity
    ‘Active Cooling Control’ for cooling available throughout the entire working temperature range, fast cool-down even at higher temperatures
  • ICC
    Intelligent temperature control.
    Intelligent cascade control - automatic and self-optimizing adaptation of the PID control parameters with external stability of +/- 0.05 °C.