Rail Road
Products - Air Dryer
A leading manufacturer since 1988
Rail Road
Products - Air Dryer Unit
- Designed for locomotive use
- Non volatile memory system
- Automatic Purge control valve
- Fixed Volume Automatic Drain valve
Operations of Locomotive Air dryer
Moist Air from the compressor enters into the Pre filter through the top manifold. Water and oil coalesces here. The condensate with water and oil is drained by the Drain valve. The drain valve is periodically opened by the controller. The specially designed drain valve discharges only a fixed volume of condensate and minimizes air loss. The air then passes through the Inlet Shuttle valve and the Drying tower. In the drying tower, Activated Alumina adsorbs the water vapour present in the air and sends out Dry air of required Dew point. Fine Alumina powder which may come from the bed of desiccant is removed by the After filter. Clean and dry compressed air is let out through the outlet shuttle valve and Purge Control valve.
Air dryers for Locomotives
Compressed air is normally fully saturated with water vapour. Air dryers are used to remove water vapour from compressed air. Heatless desiccant air dryers are the most apt solution for drying air suitable for Compressed air used in locomotives owing to their inherent reliablity and being rugged in nature. The compressed air in locomotive is used mainly for air brakes and accessories. This dryer has to withstand the vibrations, temperature, exposure to rain etc. as it is mounted out side the locomotive.
The Purge Control Valve Diaphragm senses the outlet flow and accordingly the Purge Air port size area is varied. This varies the amount of Purge Air during regeneration in proportion to the flow of compressed air through the dryer. It is also a function of the inlet pressure and hence only uses purge air in proportion to the moisture load.
The two towers operate alternately in the drying and regeneration phases. In the regeneration phase dry purge air is passed through the tower under regeneration and released into the atmosphere. Under given operating conditions (service pressure of 10.5 Kg/cm2 (g)) 10% of the airflow is used for regeneration. A fixed quanity of air is purged during very low flows. The regeneration phase is shorter than the drying phase in order to allow the regenerated tower to return to service pressure before a new cycle starts. The purge is 10% for units with Auto Adjust purge control valve and fixed 15% without Auto Adjust purge control valve.
Application of Air dryer unit
Trident Locomotive Air dryer are designed exclusively for the railroad industry for the following applications :
- Electric Locomotives
- Diesel Locomotives
- Commuter Locomotives
- Shunting Locomotives
- Mining applications
- EMU / DEMU / MEMU
FEATURES OF BEST AIR DRYER PRICE
- Designed for locomotive use : Meets all Environmental and functional specifications for the Railroad industry. This dryer will withstand the vibrations, temperature in a locomotive platform out side the locomotive.
- Operates over a wide Voltage range.
- Non volatile memory system - The dryer is completely switched off when the compressor is off and restarts where the cycle was stopped. This increases the life of the dryer.
- Automatic Purge control valve : Adjusts purge air depending on the compressed air flow and pressure. This ensures guaranteed dew point at optimized purge loss. This also reduces compressor usage.
- Best air dryer price in industry
- Fixed Volume Automatic Drain valve drains condensate without wasting much of compressed air. It has a fail safe design.
- Optimised design to meet Input-output dewpoint depression requirement.
- Desiccant health indicator for each desiccant tower.
- Pre-filter health indicator.
- Low MTTR
- High MTBF
- All aluminum construction for corrosion free long life.
- Slide-In mount : The dryer can be slided in and out for service and installation in minutes, when installed in the mounting bracket (e.g. Trident MB1).
- Dewpoint depression of 30oC at design airflow and 15oC at worst case of airflow and ambient temperature.
- Low pressure drop of 3% of inlet pressure at design air flow.
How it works
Drying Cycle: The moist air from the compressor goes through the coalescing filter. Here, water & oil coalesce and purge through the auto drain valve. The relatively clean air with water vapour passing through the aluminium drying tower filled with desiccant gets completely dried and then passes through a built in after filter. The desiccant fines from the towers are completely removed, and clean, dry air is let out through the outlet port for use.
Regeneration Cycle: During the regeneration cycle, the sudden depressurisation brings out water molecules strapped in the Desiccant pores to the surface of the beads. A small portion of dry compressed air from the drying tower then passes over the desiccant through the regeneration orifice built in the Top Block. This results in complete regeneration of the Desiccant.
Salient features
- Designed for locomotive use: Meets all Environmental and functional specifications for the Railroad industry.
- Non-volatile memory system - The dryer is completely switched off when the compressor is off and restarts where the cycle was stopped. This increases the life of the dryer.
- Automatic Purge control valve: Adjusts purge air depending on the compressed air flow and pressure.
- Fixed Volume Automatic Drain valve drains condensate without wasting much of compressed air. It has a fail safe design.
- Optimised design to meet Input-output dewpoint depression requirement.
- Desiccant health indicator for each desiccant tower.
- Pre-filter health indicator.
- Low MTTR
- High MTBF
- All aluminium construction for corrosion-free, long life.
- Slide-In mount: The dryer can be slid in and out for service and installation in minutes when installed in the mounting bracket (e.g. Trident MB1).
- Dewpoint depression of 30°C at design airflow and 15°C at the worst case of airflow and ambient temperature.
- Low-pressure drop of 3% of inlet pressure at design airflow.
Want to know more?
Interested in how our technology maintains the dryness of compressed air and improves your system’s efficiency and performance? Contact us today for detailed insights and how our solutions can meet your needs.
