The HAL Dhruv helicopter is used by India’s defense forces in a variety of roles. It is capable of flying at high altitudes and in mountainous regions, their mission cannot be delayed or restricted by a blocked filter; they require a maintenance-free engine protection system.
The “fit and forget” PUREair system is an ideal solution for such challenging operations. It shields the engine inlet from airborne contamination, which results in:
- Safer operation by protecting against sand & dust, FOD, ice, and snow
- Increased operational availability
- Protection against engine erosion
- Increased time between overhauls
On the ALH, the unit consists of two box-shaped filters fitted on both sides of the helicopter, in front of the modified engine air intake pavilion.
- Indian Ministry of Civil Aviation
Certified for operation in case of inadvertent entry into icing conditions and is allowed to operate without the need for a by-pass door and differential pressure monitoring systems.
The PUREair is a “fit and
In case of damage, please refer to the Component Maintenance Manual available through Pall Aerospace.
For additional information about this product, please contact your local Pall representative.
|The Pall PUREair solution is also an environmentally friendly alternative to oil-wetted barrier filters. There is no filter replacement and no daily cleaning as with oil-based solutions, which are difficult and expensive to dispose of.|
|1997||Pall Aerospace is selected by Hindustan Aeronautics Ltd. for the supply of the ALH PUREair system.|
|2000||Delivery of the first prototypes.|
|2002||Desert trials are carried out by the Indian Forces with two helicopters. 120 hours in the harsh environment of the Rajasthan desert, without any engine problems reported.|
|2003||Fifty (50) hours engine erosion test with Pall Aerospace PUREair system successfully carried out by engine manufacturer Turbomeca.|