Offline and Circulation Coolers

An offline cooler is a complete cooling loop in its own right. It carries its own pump and motor, pulls oil from the tank, pushes it through the core and puts it back, so the core never sees a pressure spike from the working circuit. It also runs whenever you switch it on, whether the machine is working or idling. Power packs, crushing plant, presses and injection moulding are where these end up.

Which one do I need

Start with the tank you already have.

• Existing tank, oil too hot, nothing else changing. A CC series circulation cooler bolts down beside the machine and needs two tank connections and power.
• New power pack, or the tank and filter are as tired as the cooling. Look at the H-Cube.
• You own a core or plate exchanger already and only need oil moved through it. Take a standalone gerotor pump unit.
• Oil only gets hot under load and there is room in the return line. An air blast oil cooler may be enough.

How it gets installed and what else you need

• Never tee an offline loop into a pressure line. Both ends belong in the tank.
• Put suction and return at opposite ends of the tank, below oil level. Side by side, the unit recirculates its own cooled oil and the rest stays hot.
• Limits are 100C max oil, 50C max air, motors rated to 1500m altitude. Keep the fan face and discharge clear or it breathes its own hot air.
• CC units connect through ILLZATT53G25K, the 1 inch BSPP offline rail connector, from cooler connectors and mounting.
• Gerotor units are 415V, so allow for a starter and an electrician. Run the loop on a thermostat from thermostats, switches and indicators.

Questions we get asked

Can I tee an offline loop into a pressure line? No. It draws from the tank and returns to the tank. Plumb it into a pressure line and you will destroy the pump or the core.

Will it cool while the machine is stopped? Yes, and that is the point. A return line cooler only works while the machine is moving oil.

Screw pump or gerotor? Screw pumps run quietly and suit thicker oil. Gerotor is the straightforward choice for normal industrial oil.

What size do I need? Selection is done on the machine's heat load, not off a catalogue number. Call us with the pump flow, working pressure, tank size and oil temperature.

If there is cooling water on site, compare a water cooled heat exchanger as well.