The DEPAC TS thermosyphon system TS is a simple and reliable supply system for double mechanical seals.
It can be used not only for DEPAC seals but also for other makes of double seal.
The barrier medium should be a low viscosity, well lubricating fluid which is compatible with the product and has a high boiling point and high specific heat capacity.
The viscosity of the barrier fluid should not be much higher than that of water on account of the high pipe resistance.

If safety and/or technical product-related reasons require the barrier pressure to be higher than the pressure of the medium on the seal, an appropriate nitrogen buffer may be applied.

It is always recommended to use a cooling system with cooling coils and cooling water in order to ensure the best possible circulation.

If one thermosyphon system is to be used for two seals, a forced circulation system in the form of a pump must be used on the barrier fluid line or the thermosyphon effect cannot be guaranteed.



Material All parts in contact with the medium 316 SS
Volume 7.5 liter
Operating volume 2 liter
Operating pressure *) 25 bar (375 PSI)
Test pressure 33 bar (495 PSI)
Operating temperature *) – 10 °C (4 °F) to + 120 °C (48 °F)
Cooling efficiency **) approx. 1 kW by natural circulation
approx. 3.0 kW by forced circulation

*) The limit values depend on the overall     
    operating conditions 

**) Guide values for a barrier fluid temperature 
      of 60 °C and a cooling water temperature of 
      20 °C

Level Switch
The level switch is a monitoring device for the barrier fluid. It produces an electric signal which can be used to issue an alarm or to control automatic filling devices.
Material Parts in contact with the product 316 SS
Operating pressure Up to 30 bar (450 PSI)
Operating temperature Up to 150 °C (302 °F)
Specific gravity of barrier fluid min. 0.7 g/cm2

Hand Pump as Filling Unit
The hand pump can be used to top up the thermosyphon tank with barrier fluid. Refilling can be performed during operation.
Mounting on the DEPAC TS tank is possible.
Material Parts in contact with the product 1.4571, 316 SS
Feed rate 18 cm3/stroke

Pressure Gauge/Thermometer
Pressure gauges and thermometers are available for monitoring the pressure and temperature in the TS system.
Material Parts in contact with the product 316 SS

Measuring ranges
Pressure gauge 0 – 25 bar (0 – 375 PSI)
Thermometer 0 – 200 °C (0 – 392 °F)

Circulating Unit - TS 50
The sealless circulating pump can be installed in the barrier fluid circuit in order to increase the fluid's cooling efficiency.
An external 200 mA fuse must be installed in the supply circuit upstream from the pump.
The external electrical connection must lie outside the potentially explosive area or must comply with an additionally approved type of protection.
Material  Parts in contact with the product 1.4571, 316 SS
Operating pressure 18 bar
Operating temperature 100 °C
Power connection  220 V/50 Hz
Power consumption  18 Watt
IP type of protection     68 after EN 60529
EU test certificate         QS 07 ATEX 205 X
Test reports                  IBExU IB-08-3-247
External fuse                200mA (IEC 60127-2)