What is a coalescing filter?

A coalescer filter is a device designed to separate fluid mixtures into individual components using the principle of coalescence. This process involves merging smaller fluid molecules or droplets into larger ones, enabling efficient separation. Widely used across industries, coalescer filters are particularly effective in removing liquid and vapor contaminants from gas or liquid streams, ensuring system efficiency and product purity.

The coalescer filter cartridge is designed in such a way to direct the gas or liquid flow through the filter so that it merges small droplets without reintroducing them into the stream. This ensures effective removal and prevents contamination from shifting within the system. Coalescer filters are used in the oil and gas industry for efficiently separating liquid contaminants such as oil, water, and moisture from gas. Coalescing filters offer a reliable solution, providing high filtration precision and long-lasting performance in oil & gas applications.

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Coalescing Filter Manufacturer

We manufacture and supply top-quality coalescer filters for various industrial needs. Our filters are designed to match your specific requirements like flow rate, line size, pressure, temperature, and filtration rating.Our filters efficiently separate different liquids, remove liquid aerosols, and clear contaminants from gases. This helps improve energy efficiency and protect equipment from damage.


We offer filters for air and gas, liquid-liquid, and liquid-gas separation. Made with durable materials like stainless steel, carbon steel, or aluminum, our filters can handle temperatures up to 120°C. We provide both horizontal and vertical options, with horizontal being the most popular for its ease of use.

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Coalescer Filter Working Principle

A coalescer filter operates on the principle of coalescence, where coalescer filter separator combines small liquid droplets in a fluid stream to form larger droplets, enabling efficient separation. The fluid mixture, whether liquid or gas, enters the system through an inlet port and passes through a pre-filter layer that captures larger debris, protecting the finer filtration elements. The fluid then flows through a specialized media like stainless steel coalescing filter, often made of advanced materials like fine fibers, baffle walls, or semi-permeable membranes.

The coalescer filter cartridge captures fine droplets of immiscible phases, such as oil or water, leveraging surface tension and intermolecular forces to promote droplet merging. The larger droplets naturally separate under gravity or are mechanically redirected. In liquid-liquid separation, heavier droplets like oil are drained, while lighter fluids like water continue to the collection point. For gas-liquid separation, "wet gas" containing moisture or oil droplets is dehydrated as coalesced droplets settle at the housing's base. The purified fluid or gas exits through an outlet port, delivering optimal system efficiency, superior product quality, and effective contaminant removal.

Types of coalescer filter

1. Coalescing gas filters: These filters are used to remove contaminants from gas streams. They are particularly effective at separating oil and water from natural gas or other gaseous mixtures.

2. Oil Coalescers: Designed to recover oil from water-oil mixtures, these filters are often used in industrial processes where oil needs to be separated from water before disposal or recycling.

3. Fuel Coalescer: Used to remove water and particulates from fuels, these filters ensure that the fuel is clean before it is used in engines or other machinery.

4. Coalescing Air Filters: Designed to remove oil, water, and contaminants from compressed air, they ensure clean, dry air for pneumatic systems and air-driven equipment. Used in manufacturing, automotive, and energy industries to maintain clean air and safeguard equipment.

Coalescer Filter Application

Lets understand the industrial applications of coalesce filters.

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Fuel Application

In CNG vehicles, propane, and natural gas, stainless steel coalescing filters help de-humidify and purify the gas, prevent corrosion in compressors and turbines, and ensure clean high-pressure gas storage.

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Chemical Processing

Coalescing filters remove liquid and vapor contaminants from chemicals, gases, and fluids used in manufacturing, ensuring strict product quality and low operational costs.

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Oil and Gas industry

Coalescing filters are essential for purifying crude oil, separating water, condensates, and gases, and ensuring clean fuel and efficient gas purification. They are also used in cooling water treatment, fluid analysis, and process control in these industries.

FAQS

What is a coalescing filter?

A coalescing filter is a filtration device that separates liquid droplets and aerosols from gas or liquid streams by merging small droplets into larger ones for easier removal.

What materials are in a coalescing filter?

Coalescing filters are made from materials like borosilicate micro-fiberglass, synthetic fibers, and thermoplastic resins.

What is the pressure drop on a coalescing filter?

A typical coalescing filter has a pressure drop of 2 psi, and a 6 psi pressure drop can increase energy costs by 2%.

What is the coalescing process?

The coalescing process involves merging small liquid droplets into larger ones, making it easier to separate and remove them from a fluid or gas stream.

What is the application of a coalescer filter?

Coalescing filters are used in industrial settings to remove oil, water, and particulate matter from compressed air and gas systems.

What is the difference between cartridge filter and coalescing filter?

Cartridge filters trap solid particles, while coalescing filters use gravity and centrifugal force to merge small liquid droplets into larger ones for easier removal.

What is the function of a Coalescing Filter Separator?

A coalescing filter separator combines small droplets into larger ones to remove water, oil, and impurities from fluids or gases, ensuring clean output and protecting equipment.