By offering a range of direct and indirect cooling options, oil heaters with microprocessor control offer water heating to 90degC or oil heating to 150degC.
Wittmann is set to build sales of its Tempro Plus and Tempro Primus mould temperature controllers to plastics processors by offering a range of direct and indirect cooling options. A new range of oil heaters allows the company to offer a temperature of up to 250degC. Wittmann's Tempro Basic 90 now offers water heating to 90degC or oil heating to 150degC.

Included as standard are low-watt density incoloy heat and air-purging for mould changes.

Wittmann's new Tempro direct 120 now offers direct water-based cooling for temperatures up to 120 C.

The controller is fitted with a self-optimising microprocessor control (+/- 1 C) for temperatures up to 120degC.

Pump action with pressure of up to 6 bar guarantees a high flow of process water.

The direct cooling route offers a short preheating time and a high cooling capacity.

The Tempro Plus 250 - for highest temperature operation - now comes with a magnetically coupled pump without seal, thus pre-empting any wear and tear seal problems.

Double level controls - refill warning, automatic switch-off apply - and the controller has heating capacity of 12kW.

Meanwhile Wittmann's Tempro Primus controller introduced last year continues to do well with plastics processors who are primarily seeking value-for-money equipment.

The TP Primus comes with 6kW heating capacity and a pump capacity of 60 litres at 3.8 bar pressure.

The new Primus enhancements include: a new heating element, an improved and quieter submersible element, a leak stopper and evacuating function; alarm contact and acoustic alarm; operating hours counter; a self optimising microprocessor controller (+/-1degC), and service interval display.

Additional manual filling to allow the addition of water treatment has also been factored in.

The unit is encased in a new design that allows more modular and therefore cheaper production.

Wittmann's new Tempro Primus has effectively phased out the company's Tempro Basic 90 in standard version.

The Basic with additional equipment will still be available at the same price, and the Wittmann TP Basic 140 is still available in all units.

The Wittmann Group currently employs 580 employees and enjoys a revenue of some 120 million euros.