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Threaded Compressed Air Filters

The Filter Guys

Sterling Filtration offers a comprehensive range of threaded Compressed Air Filters with 19 models offering connections from ¼” to 3” and capacities up to 2550 Nm3/h (1500SCFM)

Optimised modular housing design ensures high performance, ease of installation and multiple close coupling. Manufactured in cast aluminium alloy with Walker E-coat protection for a robust and corrosion resistant product.

Custom engineered media for optimised performance & efficiency

Oleophobic borosilicate media and a custom engineered anti re-entrainment layer guarantees exceptional dirt holding and drainage. Unique material construction minimises pressure drop and improves energy efficiency.

Self centralising, drop-fit, ant-vibration, colour coded elements

A unique endcap design which engages with the bowl, prevents vibration, improves stability and assists drainage. Colour coded elements make grade identification swift and simple.

Intelligent, unique, modular filter housing design

  • Filter elements are available in 25, 5, 1, 0.1 and 0.01 micron.
  • Pop up indicators are fitted as standard to some designs.
  • Differential pressure indicators are fitted to some designs.
  • Activated carbon filters must not operate in oil saturated conditions and will not remove certain types of gases including carbon monoxide and carbon dioxide.
  • Filter elements should be changed every 12 months or 8000 hours, whichever comes first.

How Filter Media Functions In a Filtration System

The Filter Guys

How Filter Media Functions. The job of the media is to capture particles and allow the fluid to flow through. For fluid to pass through, the media must have holes or channels to direct the fluid flow and allow it to pass. That’s why filter media is a porous mat of fibers that alters the fluid flow stream by causing fluid to twist, turn and accelerate during passage.

The fluid changes direction as it comes into contact with the media fibers, as illustrated above. As the fluid flows through the media, it changes direction continuously as it works its way through the maze of media fibers. As it works its way through the depths of the layers of fibers, the fluid becomes cleaner and cleaner. Generally, the thicker the media, the greater the dirt-holding capacity it has.

Looking at a cross-section view of the fibers:

we can see how the flow stream is accelerated as it flows into the spaces between the fibers.

This is applies to all liquid filters, be they oil, fuel, water of water glycol. For more information on filtration products and replacement elements please contact us for a chat. We’re here to help.

How Filter Media Collects Particles

The Filter Guys

How Filter Media Collects Particles. There are four basic ways media captures particles.

The first, called inertia, works on large, heavy particles suspended in the flow stream. These particles are heavier than the fluid surrounding them. As the fluid changes direction to enter the fiber space, the particle continues in a straight line and collides with the media fibers where it is trapped and held.

The second way media can capture particles is by diffusion. Diffusion works on the smallest particles. Small particles are not held in place by the viscous fluid and diffuse within the flow stream. As the particles traverse the flow stream, they collide with the fiber and are collected.

The third method of particle entrapment is call interception. Direct interception works on particles in the mid-range size that are not quite large enough to have inertia and not small enough to diffuse within the flow stream. These mid-sized particles follow the flow stream as it bends through the fiber spaces. Particles are intercepted or captured when they touch a fiber.

The fourth method of capture is called sieving and is the most common mechanism in hydraulic filtration. As shown at right, this is when the particle is too large to fit between the fiber spaces.

Vacuum Pump Filters

The Filter Guys

Air filters are an important part of any vacuum pump filters system. They prevent dirt from being sucked into the vacuum pump, and help avoid unnecessary wear. They offer minimum pressure losses and guarantee energy efficiency and long service life and can ensure your vacuum pump continues to operate at optimum performance levels.

The airtight vacuum air cleaners available at Sterling Filtration Ltd are designed for installation in air and gas pipes. They are airtight up to 1000 mbar negative pressure and equipped with a filter element. They are also used as intake filters in vacuum pumps.

Complete vacuum housings and replacement elements are available at Sterling Filtration Ltd. Tel: 01902 491118.