Steam Trap

Thermodynamic steam traps manufactured by Uamani valves co pvt ltd are best suited and widely used for mainline trapping applications. Thermodynamic steam traps operate on Bernaulli's principle and are the best choice for mainline condensate drainage. 

The compact size of our thermodynamic steam traps ensures minimum radiation losses taking place through the trap body. They are robust, efficient and quite maintenance free as only moving part involved is a disc. Usmani valves co pvt ltd Thermodynamic steam Traps are being used for decades by the steam users and reliability and efficiency of these steam  traps is proven. Using Usmani valve Thermodynamic steam Traps promises quick removal of condensate and puts a check on
water hammer and other condensate related issues.

Usmani Thermodynamic Steam trap TD-3 is classified as Usmani valve operated traps and its the most widely used trap in the oil and gas industry amongst all types. This thermodynamic steam trap has an extremely robust design and works on a simple mode of operation. It can operate at very high temperature and pressure. The means of operation for the trap is the dynamic effect of steam as it passes through the trap as shown in the sketch 1 below. The disc above the flat face inside the control chamber or cap is the only moving part in the steam trap. 

This is the commonest type of steam Trap relying on the fact that hot Condensate released under pressure will generate flash steam. Thermodynamic steam trap is fairly simple in construction, with only disc as the moving part inside the control chamber fitted on the top of the Trap body. The central inlet port in the body provides a flat seating surface with an annular groove around it to connect it to the discharge port.

The functioning of the thermodynamic trap can be understood from the accompanying sketch above. During the initial startup cold air and Condensate lift the disc from the seat to pass radially outwards through the annular groove to the exit port (refer Figure-1, Sketch 1).

As the Condensate approaches the accompanying steam temperature it tends to flash giving rise to the velocity of fluid passing under the disc and thereby causing a drop in the pressure. The flashed steam eventually filled in the control chamber, at the same time exerts pressure from above to push the disc down against the seat which snaps the flow passage shut to block the discharge of the condensate

The Disc remains closed under the steam pressure of the flash steam of the control chamber for a while

With lapse of time the flash steam in the control chamber condenses (by loosing heat to the surrounding atmosphere) to once again lift the disc under the upstream line pressure and allow the flow of Condensate.

         Compact and light weight design.

         Owing to simple internal parts thermodynamic steam trap has a fairly high resistance to corrosion.

         Less prone maintenance. As disc is the only moving part maintenance can be carried out without removing the trap from the line.

         Efficient operation under varying steam pressure and condensate loads.

         Thermodynamic steam trap allows high heat transfer efficiency by discharging condensate at the steam temperature.

         Can be used for high and super heated steam and are not affected with water hammer and vibrations. As such no condensate banking.

         Same model can be used for wide range of operating pressures.

         Freezing has no damage effect and are unlikely to freeze if installed with the disc in a vertical plane and discharging freely to atmosphere. However, operation in this position may result in wear of the disc edge.

      On very low differential pressures, Thermodynamic steam traps will not work positively, as the velocity of flow across the underside of the disc is                    insufficient for lower pressure to occur. They are subjected to a minimum inlet pressure (typically 0.25 bar g) but can withstand a maximum                            back pressure of 80% of the inlet pressure.

      If the inlet pressure builds up slowly, thermodynamic steam trap can discharge a large amount of air on start-up. However, rapid pressure build-up will         cause high velocity air to shut the trap in the same way as steam, and it will air-bind. To avoid this case a separate thermostatic air vent can be fitted  in       parallel with the trap. Nowadays modern thermodynamic steam traps have an inbuilt anti-air-binding disc which prevents air pressure building up on top       of the disc and allows air to escape.

     The use of a thermodynamic steam trap in some locations may be prohibited because of the noise factor during the discharge of the trap. If this is a             problem, it can easily be fitted with a diffuser which considerably reduces the discharge noise.

     While sizing the thermodynamic steam trap care should be taken not to oversize the trap as this can increase cycle times and induce wear. Steam                 mains  drainage applications often only need to be fitted with low capacity versions, providing proper consideration is given to sitting the drain pockets           correctly.

Thermodynamic Steam Traps

Steam has two components: 1] the latent heat useful in process for Heat transfer, and 2] the Sensible heat in the form of condensate having only the heat content not useful in process, rather hindering Heat transfer and causing damage to piping equipment due to its presence. Hence, there is need to remove condensate and trapped steam. This is done by Steam trap.

The Thermodynamic Trap works on the principle of difference in the velocities of Steam and Condensate. Used Mainly on Drip lines of the main steam distribution line, uses condensate pressure to open the trap and discharge the condensate and then the Flash steam formed due to the high flash steam velocity & accumulation of flash steam over disc, Device close and trap the live steam when it appears.

Thermodynamic Steam Trap are compact and lightweight and discharge condensate as and when it is formed.

         Available in Sizes: 15, 20 and 25mm

         End connections: Threaded to BSP/BSPT/NPT, SW and BW, as well as Flanged to #150/300/600/900/1500. E

         Pressure Ranges of 30 bar [UTTD21], 55 bar UTTD55 [Single and Three orifices], 100Bar [UTD 62] AND 250 Bar [UTD120]

         MOC: AISI 420./ 743 Gr. CA40[UTTD21/55] / ASTM A217 Gr. WC6[UTTD62] / ASTMA 182 Gr. F22 cl3. [UTD120]

         Max. Operating temperature: 425 Deg. C[UTD55] 550 Deg. C. [UTD62/120]

Steam traps for draining steam pipes, trace heaters and steam systems

These steam traps work on the basis of a simple thermodynamic principle. Incoming condensate lifts the valve disk of the regulator to the open position, while steam causes it to close immediately. The traps in the DK series are correspondingly simple in structure, feature a small, compact body and are low in cost.

USE

Compact steam trap for draining heating processes with small load fluctuations.

Especially recommended for use in:

         Saturated steam pipes

         Superheated steam pipes

         Trace heaters

         Air heaters