Air cooled liquid chillers Nominal cooling capacity 8 - 259 kW

Thanks to its wide operating limits, the possibility of operating in both pressurised and atmospheric hydraulic circuits, and the numerous versions and options available, Valkira is at the top of its category, allowing great application versatility and a high level of reliability. 

Valkira is therefore the optimal solution for all process applications that require high performance, continuity of operation and reduced operating costs.

Benefits:

Refrigerant fluid R410A (ODP = 0), able to guarantee excellent performance thanks to improved heat exchange properties;

Innovative finned coil evaporator immersed in the hydraulic tank, characterised by low pressure drops and reduced susceptibility to fouling;

Standard storage tank for precise control of water outlet temperature even under varying thermal load conditions;

Best-in-class operating limits (minimum Twout = -10°C standard);

Standard hydraulic circuit suitable for both pressurised (up to 6 barg) and atmospheric systems;

Compact design;

Suitable for outdoor installation;

Standard air condenser filters;

Safety hydraulic by-pass;

Wide range of accessories and kits for customised solutions;

Easy installation, operation and maintenance;

Stable and reliable operation suitable for 24/7 operation;

Master/Slave modularity from 2 to 5 units.

Technical characteristics:

Galvanised and polyester powder coated carbon steel sheet structure;

Refrigerant R410A;

Microprocessor control; 

High-efficiency hermetic scroll compressors;

Finned coil evaporator with copper tubes and aluminium fins placed inside the inertial tank;

Finned coil condenser with copper tubes and aluminium fins generously sized and protected by filters;

Electronic expansion valve (from mod.031);

HP/LP refrigerant pressure gauges (from mod.031);

Integrated hydraulic unit configuration consisting of: single or double medium or high head circulation pump, inertia tank, safety valve, air vent valve;

Water delivery pressure gauge;

Phase monitor;

Compressor crankcase heaters;

Axial fans with optimised blade profile;

Conductive level sensor;

400/3/50 power supply;

SEPR HT and SEPR MT Tier2 compliant.

Versions:

Non Ferrous hydraulic circuit under pressure (mod.020-802);

Fine adjustment of water outlet temperature by means of hot gas by-pass valve (hysteresis ± 0.5°C) (mod.020-351);

Low ambient temperature version -20 °C (mod.031-1002);

Bi-frequency version: power supply 400V/3/50 Hz - 460V/3/60 Hz (mod.020-161);

460V/3/60 Hz power supply UL508A - CSA 22.2-14. 

Accessories:

Evaporator frost protection;

Single or double circulation pump (mod.201-1002) with medium or high head;

Single medium head booster pump in the evaporator (mod.031-1002);

Version without pump;

Centrifugal fans (mod.031- 161);

High head EC inverter fans (max 150 Pa) (mod.201-802);

Electronic regulation axial fans (mod.031-802);

Brushless EC fans (mod.902-1002);

Condensing coils protection with protective paint. 

Kit:

Tank for manual loading of atmospheric hydraulic circuits;

Automatic loading system for pressurised hydraulic circuits;

Glycol filling device;

BSP-NPT hydraulic fittings;

Automatic hydraulic bypass overpressure valve; 

Centrifugal fans;

Electronic fan control;

Remote ON/OFF;

Remote terminal;

RS485 supervision systems, XWEB300D EVO;

Master/Slave modularity kit from 2 to 5 units.