What is Thermodynamic Trap?

Thermodynamische Fallen nutzen die kinetische Energiedifferenz zwischen Hochgeschwindigkeitsdampf (ein Gas) und langsamer fließendem Kondensat (einer Flüssigkeit).

Because of their compact design and cost-effectiveness, thermodynamic steam traps are widely used in applications where condensate needs to be removed immediately from steam lines and steam equipment. They discharge the condensate near saturation temperature.

Traps can operate up to 80% of the inlet pressure to the backpressure, but it is recommended that the backpressure not exceed 50% of the inlet pressure for trouble-free operation. Thermodynamic steam traps discharge condensate intermittently.

Thermodynamic Trap Prices

Thermodynamic steam trap prices vary according to models and brands. The material used, the general performance of the trap, the type of use, the pressure and temperature values to be used are among the factors affecting the steam trap prices. Various factors such as steam trap supplier rates, market sector and profit rates also continue to affect prices.

Thermodynamic Trap Working Principle

Initially, the incoming pressure pushes the disc up from the bottom and the cold condensate and air are quickly discharged.
After the hot condensate flows into the siphon, steam enters.
As the hot condensate flows between the disc and the bed, the steam fills the pressure chamber. Then the pressure of the pressure chamber, the upper pressure of the disc will increase. Also, since the disc will close after the high velocity steam flow, the pressure of the pressure chamber, the pressure of the upper part of the disc will decrease and the valve will close.
When the condensate re-enters the trap, the valve continues to close until the steam in the pressure unit condenses with heat loss.
Then the steam will condense and the pressure will drop. Then the valve will open as the lower pressure of the disc is greater than its upper pressure. During normal operation, (3) and (4) will repeat continuously.

Thermodynamic Trap Types

There are 3 types of thermodynamic steam traps:

Disc Thermodynamic Trap: In disc thermodynamic traps, the disc allows the valve to be opened and closed with the incoming pressure. The condensed liquid and air in the system are discharged. When the temperature of the liquid reaches the steam temperature, fresh steam is formed. The resulting fresh steam closes the disc and the system repeats like this.

Reciprocating Thermodynamic Trap: The working principle of reciprocating traps is similar to disc traps. The only difference is that the disc is replaced by the piston. Under the influence of pressure, the piston closes the valve and when the pressure drops, the valve opens again.

Levered Thermodynamic Trap: This type of steam trap is similar to the working principle of reciprocating thermodynamic traps. The opening and closing of the valve is controlled by the lever.

General Features

It is simple, robust and reliable.
They can operate up to very high temperatures and pressures.
Initially, the incoming pressure raises the disc and the cool condensate is immediately discharged.
The hot condensate flowing through the inlet passage to the chamber below the disc lowers the pressure and releases the flash steam moving at high speed. This high velocity creates a low pressure area under the disc, pulling it towards its seat.
The operating speed depends on the steam temperature and ambient conditions.
Most traps will stay closed for 20 to 40 seconds. If the trap is opened too often, perhaps due to a cold, wet, or windy location, the opening speed can be slowed by installing an insulating cover on top of the trap.

Product Features

Model: UKT – 70 F
Size: 1/2″-3/4″-1″
Body: Forged Steel
Cover: Stainless Steel
Strainer Disc Seat: Stainless Steel
Max. Operating Pressure: 40 BAR
Max. Operating Temperature: 400°C
Min. Operating pressure: 0,3 BAR

Thermodynamic Steam Trap Advantages

It has the feature of working during all operating ranges. They do not need any settings or internal changes.
It is compact, simple, lightweight and has a large condensing capacity for its size due to the larger openings.
It can be used in high pressure and superheated steam and is not affected by water hammer or vibration.
Available in an all-stainless steel construction offering a high degree of resistance to corrosive condensate.
Condensate is not damaged by freezing, and if the disk is installed in a vertical plane and freely discharged into the atmosphere, it is unlikely to freeze. However, operating in this position may cause the disc edge to wear.
Since the disc is the only moving part, maintenance can be done easily without removing the siphon from the siphon line by removing the bolted or threaded top cover.
It makes an audible “click” sound when the faucet is opened and closed. This makes trap testing very easy and straightforward.

You can watch our video to have more detailed information about steam traps.