Equipment for cold process water supply for submersible coolers of rubber belts from extruder. Cold water is supplied by pumps from a storage tank. The warmed water from the rubber belts flows by gravity into the collection tank, into a part of the warm water. The water is pumped from there into the cooling circuit to return cooled to the storage tank, part of the cold water. Cooling is provided either by factory water, compressor water cooler, or a combination of both. The temperature of the cooling water is indicated by the controller on the control panel. There is on the control panel showing of faults and operating states, pump control and access to parameter settings.