Equipment for hazardous areas available from jbj Techniques Limited

EQUIPMENT FOR HAZARDOUS AREAS HEAT EXCHANGERS 13 Our water-oil Heat Exchangers are normally used for the cooling of hydraulic oil and are installed on the return line of the system or a seperate circuit. The range comprises a choice of highly efficient models. The range utilises high quality materials and is manufactured using precision machinery, resulting in an extremely reliable product. The heat exchangers are available with water circuits of 1, 2 or 4 passes. They can be supplied with thermostatic valves which greatly assist in the reduction of water consumption. Compatible Fluids • Mineral oils HL-HLP • Mixture water/oil • Water/glycolic acid • Water/industrial water • For other fluids contact jbj Techniques Limted technical office, telephone: 01737 767493 or email: info@jbj.co.uk Technical Specification • Version: fresh water - sea water - AISI • Operating pressure: 12 bar • Test pressure: 18 bar • Maximum operating temperature: 120°C Installation The correct position of inlet of the two fluids is indicated in figure 1. They should circulate in the opposite direction, in order to obtain the maximum heat exchange. The assembly of the heat exchanger on the machine should be carried out using appropriate flexible supports. Water and oil service connections should be made using flexible tubing. It is advisable to install a by-pass valve to prevent damage caused by pressure spikes, figure 2. At very low temperatures, it is advisable to keep the water in constant circulation to prevent ice damage, otherwise drain the exchanger by use of the discharge valve when not in use. Figure 1 Figure 2 Maintenance Water side cleaning - To maintain the maximum effectiveness of the exchanger, periodic inspection of the water circuit is advisable to eliminate all traces of lime or any other impurities, which might be deposited inside the tubes. This operation can be easily accomplished by removing the headers and flushing out the tubes. Oil side cleaning - In this part of the circuit, the cleaning will be carried out through the circulation of perchloride in the opposite direction of the normal flow, for about thirty minutes.

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