# What is the beta rating of a filter?

## What is the beta rating of a filter?

Beta Ratio equals the ratio of the number of particles of a minimum given size upstream of the filter to the number of particles of the same size and larger found downstream. Simply put, the higher the Beta Ratio the higher the Capture Efficiency of the filter.

## What is beta ratio on oil filter?

Beta ratios are defined as 2, 10, 20, 75, 200, 1000, and 2000. A 3-micron filter with a beta ratio of 2 means that the filter is 50% efficient at removing particles 3 microns and larger. A 3-micron filter with a beta ratio of 2000 means the filter is 99.95% efficient at removing particles 3 microns and larger.

What is the beta rating?

Beta is a measure of a stock’s volatility in relation to the overall market. By definition, the market, such as the S&P 500 Index, has a beta of 1.0, and individual stocks are ranked according to how much they deviate from the market. A stock that swings more than the market over time has a beta above 1.0.

What is meant by a beta ratio of b3 50?

The primary advantage of the dynamic efficiency test method is the system’s ability to simulate actual operating conditions. A Beta Ratio may be given for a filter as B10 = 50. (Depicted in this way on many filters) This simply means that the Beta Ratio for 10 micron equals a ration of 50.

### Is Alpha higher than beta?

Alpha shows how well (or badly) a stock has performed in comparison to a benchmark index. Beta indicates how volatile a stock’s price has been in comparison to the market as a whole. A high alpha is always good.

### How do you interpret a beta ratio?

The Beta Ratio itself is calculated by taking dividing the number of upstream particles by downstream particles. For example, if 100,000 five micron particles were measured, on average, before the filter, and 100 five micron particles were measure after the filter, the beta ratio was 1,000.

What should the beta ratio of a filter be?

Most experts agree a Beta Ratio for a given particle size should be at least 75 to achieve a reasonable level of effectiveness. High quality, efficient filter assemblies can achieve 200 to 2000 Beta Ratio for a given particle size, and I would recommend you should use as high quality filtration as is reasonable.

Which is more efficient Beta 1000 or beta 2?

Clearly a media with a ratio of Beta 1000 is far more efficient than one with a rating of Beta 2 on that given particle size. Your shirt sleeve may well have a Beta ratio higher than 2000 on particles the size of marbles. The same sleeve may have a Beta ratio of less than 2 on particles the size of talcum powder.

## When to use beta ratings for fuel filtration?

Beta ratings can be used to explain the efficiency of filtration for all fluids, oil, diesel, petrol etc; itâ€™s simply a measurement. You May Like… When you need fuel, lube oil or coolant filtration systems for new and existing engine applications, consider Donaldson as your single source.

## How is the efficiency of a filter calculated?

Using the beta ratio, a five-micron filter with a beta 10 rating, will have on average 10 particles larger than five microns upstream of the filter for every one particle five microns or greater downstream. The efficiency of the filter can be calculated directly from the beta ratio because the percent capture efficiency is ((beta-1)/beta) x 100.