Open tank units: water at 90°C and oil at 150°C
The simplest, most economical and lowest maintenance construction of the SMART Series. An atmospheric tank (non-pressurized) from which the pump draws the fluid: water up to 90 °C o thermal oil up to 150 °C.
In a unit of open deposit, a pump drives the fluid under pressure from an atmospheric tank through the process, with resistance heating and indirect cooling. It is the base family of the SMART Series: water up to 90 °C (5 models) and oil up to 150 °C (3 models).
And ribbon simple and robust
The pump drives the fluid under pressure from the tank—atmospheric, not pressurized—through the consumer, and back to the tank. The stainless steel resistors they heat; a sensor measures the temperature and a control PID modulates heating and cooling to maintain the setpoint.
The cooling is indirect: the plant cooling water passes through a exchanger (in water) or by a submerged coil (in oil) and extracts heat without mixing or contact with the process fluid. Thus the circuit remains isolated and the control stable.
The team can also reverse the pump to empty the mold before disconnecting it; The recovered fluid returns to the tank, which must have the capacity to accommodate it.
Water up to 90 °C · oil up to 150 °C
How far does it go each fluid
At atmospheric pressure, water does not work with a margin above 90 °C; For a higher temperature it is pressurized. The oil, on the other hand, reaches 150 °C in an open tank; Above it is passed to the closed circuit (180–300 °C).
There are areas of overlap: below 90 °C the water can go both in tank and pressurized, depending on the installation; and in processes below ~140°C compatible with water, a water family offers better transfer at lower cost.
The two families, at a glance
| Parameter | Water · open tank | Oil open tank |
|---|---|---|
| Maximum temperature | 90 °C | 150 °C |
| Models | 5 (BASIC · W · 2 W · 4 W · 5 W) | 3 (2A 4A 5A) |
| Heating | 3 – 36 kW | 6 – 30 kW |
| Deposit capacity | 8 – 70 L | 20 – 70 L |
| Pump flow | 60 – 200 l/min | 60 – 200 l/min |
| Refrigeration | Indirect (exchanger) | Indirect (submerged coil or exchanger) |
| Fill | Automatic (2 solenoid valves) | Manual + expansion volume |
| Level control | Electrode (standard) · stainless steel float with non-conductive fluid | stainless steel float |
| Materials in contact | Stainless steel resistors, tank, pipes and thermocouple | |
From 90 °C in water, the fluid quality conditions limescale and corrosion over time. We develop it on its own page.
The base family, dimensioned to your process
Tell us your temperature, power and flow rate and the configurator sizes the appropriate open tank unit.
The storage units of the SMART Series
Marse manufactures two open tank families: Water with tank (agua ≤90 °C — modelos SMART BASIC, W, 2 W, 4 W, 5 W) y Oil with tank (oil ≤150 °C — SMART 2A, 4A, 5A models). They share stainless steel construction, indirect cooling, security package and Display (TG121) or TouchScreen (TG111) control. The most common use is mold thermoregulation in plastic injection.
Common questions
¿Qué significa "depósito abierto" o "atmosférico"?
That the equipment tank is at atmospheric pressure: the fluid is not pressurized and the pump takes it from the tank to push it, under pressure, into the process.
What temperature does it reach?
Water up to 90 °C and oil up to 150 °C. Pressurized water (up to 180 °C) or oil in a closed circuit (up to 300 °C) is used on top.
Is the cooling water mixed with the process water?
No. The cooling is indirect: the plant water passes through an exchanger (in water) or through an immersed coil (in oil) and extracts heat without contacting the process fluid. The circuit is isolated.
How is the level and filling controlled?
In water, the level is monitored by an electrode (standard) and filling is automatic (two solenoid valves); If the fluid is not conductive—for example with glycol—the level is designed with a stainless steel float. In oil, the level is monitored by a stainless steel float and filling is manual, with an expansion volume that absorbs the expansion of the oil when it is heated.
What is the reverse pump for?
Allows the mold to be emptied (the consumer drained) before disconnecting it; The recovered fluid returns to the tank. That is why a large tank is advisable: Marse sizes it with the largest capacity on the market, up to 70 L in this family.
How many models are there and what powers do they cover?
Water: 5 models (3–36 kW, 8–70 L tank). Oil: 3 models (6–30 kW, 20–70 L tank). The pump flow reaches up to 200 l/min depending on the model.