Test Facility

At MNR, we believe that no claim can be affirmed unless backed by proper tests. For our products to be successful in the market place we should have hard data that proves our products are compatible with all working conditions. Acknowledging the necessity, we have invested heavily in our testing facilities. Our test rigs, co-designed and developed with the Indian Institute of Science, Bangalore, are considered to be a touchstone. Today, we are proud to have one of the most precise and efficient test rigs in the country.

Test rigs

With four state-of-the-art test rigs which are compliant either with ASHRAE 52.2 1999 for industrial applications or with SAE J726/87 for automotive applications, our testing facilities accommodate a huge array of flow rates and terminal pressures.

Our test rig for automotive air filters that go into 2 and 3 wheeler internal combustion engines is based on SAE J726/87 and JIS-D-1612/1976, with a maximum air flow capacity of 50cmh. It is used by many of our esteemed customers.

When evaluating larger displacement automotive air filters with flow rates up to 2000cmh and pressure differentials above 1000mmWG, our two test rigs equipped with a blower, with impeller blades (backward curved self cleaning type), provide precise results. The higher flow rates are achieved by a series of multistage blowers. For evaluating air cleaning devices as per ASHRAE 52.2 1998, a rig with an air flow capacity up to 10,000cmh is used. This rig has been upgraded to ASHRAE 52.2 1998 with the addition of a KCl based aerosol generator used to test Coarse, Fine and Superfine filters.

HEPA filters are tested for leakage using paraffin oil fog test as per DIN 24184 and for efficiency with DOP generators and laser based Optical Particle Counters. On-site checking is done with digital photometer and DOP generators as per EN 1822.

Dust Feeders

MNR has successfully designed and developed an innovative dust feeder which is a fully automated Piston in Cylinder type. A multicylinder configuration is designed to meet any specific continuously variable dust loading range. The feeder can be operated in tandem to increase the maximum dust loading capacity. In this design, the dust is carried to the top end of the feeder into a conical chamber where tangential, regulated and compressed air flow creates a swirling motion in the main chamber. The swirling motion helps in the scooping out of dust and forcing it out of the exit tube as a homogenous dust plume. The revolutions of the pistons are controlled through a RS 232 port using a PC.

The fact that our customers use our resources as their default R&D test house speaks volumes for our testing and research. We have automotive filter housings from our customers to help them validate their designs and provide exhaustive test reports on industrial filter supplies.
The score of tests conducted for our clients include:

Leak testing and efficiency of HEPA/ULPA filters with DOP generators, Oil Fog Test unit, laser based Particle Counters and Photometers.