Daulat Ram Industries Group
HVAC, Resistors and Braking Systems for the Railway Industry
Mr Satish Sharma, founder and chairman of Daulat Ram Industries, in his younger days with Pandit Jawaharlal Nehru, first prime minister of India.
Daulat Ram Industries (DRI) is a leading manufacturer and supplier of rail industry. It manufactures various types of dynamic braking solutions for diesel, diesel-electric and electric locomotives, as well as a variety of resistors, AC and DC motors and blowers for force-cooling solutions, fabricated structures.
DRI also provides complete heating, ventilation, and air conditioning (HVAC) solutions for passenger coaches, freight wagons and locomotives. It is now making a foray into the field of green toilets, state-of-the art pantry car equipment and fabricated bogie frames for passenger coaches as well as locomotives.
Dynamic braking solutions
Over the last two decades, Daulat Ram Industries has been manufacturing various kinds of dynamic braking solutions for diesel, diesel electric and electric locomotives. Our force-cooled dynamic braking modules comprise resistor grids, motors, fans, cables, high-temperature resistant insulators, cables and steel fabricated covers.
Our dynamic braking solutions are designed for more than 900amp and resistance tolerances as high as +/- 2%. We have adopted an approach of maximum backward integration and that is why today DRI offers a flexibility of customising dynamic braking solutions towards the customer’s needs at a prudent price.
Resistors for applications in locomotives
Daulat Ram Industries manufactures a variety of resistors for locomotive applications, such as permanent field diverter resistors, field-weakening resistors, pre-charge resistors, damping resistors, resistors for over-voltage protection, crowbar resistors, snubber resistors, field-shunting resistors, main starting resistors and harmonic filter resistors. All the resistors are designed to reduce lifecycle costs of the user.
DRI also manufactures various part numbers of resistors according to the designs of the original equipment manufacturer (OEM).
A variety of roof-mounted package unit air conditioners, ranging from 1.5t to 10t capacity, are manufactured by Daulat Ram Industries for applications in passenger coaches, locomotives and freight wagons. Our microprocessor-controlled monitoring system ensures comfortable cooling or heating and monitors high and low pressure voltage and current levels for efficient operation of the unit.
R-407 C refrigerant is used to maintain cooling levels while meeting all the environmental laws.
Our design team can produce sub-base, sidewall and side-mounted designs of heaters and air conditioners to suit the client’s specifications.
Fan assemblies and motors
We build top class motors to deliver more horsepower in smaller packages. They are designed to perform under stressful conditions at higher temperatures.
Customised heavy-steel rolled frames or cast steel/ iron frames provide top-class structural stability. Class H insulation material is used and coil and frame are varnish dipped and baked.
Our fans are designed according to the versatile principals of air engineering and are metallurgically stable. We adopt low pressure and pressure die-casting techniques to achieve highly integral and stable casting structures, which qualify top-level radiography tests.
We manufacture 54in radiator cooling fan assembly, up to 52in braking grid fan motor assembly, oil cooling blowers and other customised fan-motor assemblies for various applications.
Fabricated structures for locomotives, passenger coaches and freight wagons
Our fabrication abilities are endowed with superb skilled manpower backed up by solid design team and state-of-the-art machinery to handle fabrication of mild-steel, stainless-steel, aluminium etc. with very high accuracy levels.
We build all our products from the design stage and they have in built ruggedness to provide smooth performance at high speed and heavy vibrations.
Our design engineers use finite element analysis (FEA) and failure mode effect analysis (FMEA) to ensure reliability and predictability of our fabricated structures. We manufacture locomotive superstructures, under frames, side walls, roof assemblies, fuel tanks and austenitic stainless-steel sidewalls and roof assemblies.
In addition to above, Daulat Ram Industries are going to start manufacturing fabricated bogie frames for EMD design 4500 HP locomotives, ABB design 6000 HP locomotives and Fiat bogies for passenger coaches shortly.
About Daulat Ram Industries
Daulat Ram Industries was founded in 1973 in Bhopal, the capital of Madhya Pradesh. Today, it has got seven manufacturing units in four cities. With a workforce of more than 350 people and a sales turnover of more than $25m, DRI has come a long way in the last 40 years.
At DRI, we are committed to provide world class products and services to our customers as per their specifications.
That is why we say that we believe in ‘synergising ideas and integrating skills’.