RAPX
EVAPORATIVE COOLERS

This innovative evaporative cooler, with preassembled axial EC fans, guarantees better performances and minimum maintenance. Overall running costs are much lower, as are installation and operating costs compared to older generation capacitors. This innovative evaporative condenser represents a sustainable solution for industrial refrigeration and other industrial process applications.

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EVAPORATIVE COOLERS

They differ from evaporative towers in the use of a heat exchange battery for the primary process fluid.

Having a machine with the process fluid inside a heat exchange coil allows the primary fluid not to be “dirtied” by sediments or microparticles present in the water. The presence of the heat exchange coil also makes it possible to use glycolised process water where the system requires it.

Key points for choosing an evaporative cooler instead of an evaporative tower:

The process fluid flows through a heat exchanger coil: the fluid is not contaminated by particles in the water or by atmospheric agents.

Glycolated fluids can be used safely thanks to the use of the heat exchange coil

The units can operate in dry mode in sub-zero winter conditions, without recirculating water and only with the fans running.

PRODUCT DATA SHEET

CONSTRUCTION FEATURES

The RAPX type machines, evaporative coolers with EC axial fans, are built and assembled in accordance with our ISO 9001 certified quality system.

STRUCTURE & ASSEMBLY

The standard unit is built with Magnelis® (steel, zinc, aluminium, magnesium) ZM310 type sheet metal panels to ensure maximum surface protection empirically comparable to a galvanized sheet metal with over 1000 g/m2 of zinc. The individual panels, following the cutting and folding phase, are assembled with AISI 304 (A2-70) or on request AISI 316 (A4-80) stainless steel small parts and highly adhesive butyl mastic gasket reinforced with polyester mesh inside to guarantee great shape stability and resistance to temperature variations. No welding is required in the various stages of assembly of the structure (self-supporting). The color of the sheet metal type Magnelis® is RAL 9006.

WATER COLLECTION BASIN

The basin section is built with thick Magnelis® ZM310 sheet metal paneling and is equipped with removable anti-cavitation filter in AISI 304L (to protect the secondary circuit pump) and water make-up valve with brass/stainless steel body and stainless steel or polypropylene floating ball. All machine connections are made of galvanized steel (AISI 304L on request). The water recirculation pump is housed outside the basin structure, with a cast iron body and IP54 motor protection rating.

THERMAL EXCHANGE COIL

The standard heat exchange coil is made of smooth (optionally finned) carbon steel tubes (AISI 304L on request) of suitable diameter and thickness and bent following our proprietary geometry. Everything is hot-dipped galvanized in accordance with the UNI EN ISO 1461:2009 standard to guarantee perfect resistance to corrosion. Subsequently the coil is tested in compliance with the PED-CE regulation.
The machines are supplied with the coil pre-charged with nitrogen at a pressure of 3 bar.

WATER DISTRIBUTION SYSTEM

The water is uniformly distributed by a piping system inside the machine made of PVC with a Magnelis® sheet metal distribution box. The spray nozzles are of the non-clogging type, of medium and large diameter, in ABS and easily replaceable in case of maintenance.
The pipes that connect the recirculation pump with the internal ramp are made of PVC, easily removable for possible cleaning of the circuit, in accordance with the latest health provisions (anti-legionella).

VENTILATION SYSTEM

(MOTORS + FANS)

The fan part is located along one side of the basin section, on this wall are fixed the 2 banks of electric fans complete with diffusers and protection nets. The axial fan is made with high-efficiency and low-noise sickle-shaped aluminium blades. The fan protection mesh will be made of painted steel.

The EC axial fans with bi-frequency motor and variable speed are adjustable from 0 to 100% with external signal, while high efficiency due to permanent magnets and electronic control make it compliant with the ERP Directive. The motors comply with EU regulation 2019/1781. The power supply, control, regulation and alarm terminals are enclosed within the terminal box of the electric motor.

DROP SEPARATOR

Drift eliminators are made in PVC (PP on request) and divided in various sections to facilitate their removal in case of replacement or inspection of ventilation and water distribution system. The used drift eliminators allow a passage of drops equal to 0.001% of the droplets present at the entrance, removing water loss, potential aerosols drift that might contain Legionella bacteria.

TEST

All components are supplied assembled. Each unit, before delivery, is subjected to hydraulic testing, to ensure that there are no water leaks in the tank, and electrical to check that the electric motors have an absorption in line with the plate data.

CATALOGS AND TECHNICAL DATA

Catalog list.

CERTIFICATIONS

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