FG Series Fiberglass Natural Gas Pre-Filter Element For Solid Impurity Interception

As the essential first-stage protection part of two-stage natural gas purification system, Coalescing Filter matching FG filter element is specially developed for intercepting large solid pollutants inside raw natural gas. Unlike liquid coalescing cartridges, this fiberglass gas filter adopts single-layer thick fiberglass winding media, focusing on blocking sand, pipeline rust, iron sulfide powder and molecular sieve debris before gas enters the PCHG coalescer filter cartridge. If lacking qualified natural gas pre-filter, hard solid particles will scratch gradient coalescing media, shorten service life sharply and increase replacement cost of downstream gas filter cartridge. All FG series products pass ISO 16889 multi-pass dirt holding test, with ultra-large pollutant storage capacity, widely matched with PECO and Faudi standard filter separators, and perfectly cooperate with all models of gas filter element coalescing & separation series.

Working Principle of FG Fiberglass Pre-Filter Element

Raw natural gas flows from outside to inside through the FG filter element. The dense fiberglass matrix forms countless tortuous flow channels, capturing solid particles via inertial collision and direct interception mechanism. All captured dirt accumulates on the outer surface of the fiberglass gas filter without penetrating the inner core. Clean gas without solid impurities flows inward to the second-stage coalescer for liquid removal. The low-resistance winding design ensures stable gas transmission flow, and the pressure rise speed is far slower than ordinary thin-layer natural gas pre-filter, reducing system energy consumption for gas pipeline equipment.

Core Technical Parameters

• Media Material: High-strength continuous fiberglass

• Optional Precision: 0.3/0.5/1/5/10/25/50μm

• Max Operating Pressure: 3.4MPa

• Max Differential Pressure for Replacement: 15psid

• Sealing Material: Buna-N, EPD, Viton optional

• Compatible Housings: PECO 75/85 series, Faudi standard filter separator vessels

Every finished FG filter element undergoes air tightness and collapse resistance testing before delivery, fully supporting customized length and end cap size for non-standard pipeline vessels, and compatible with all sets of Oil & Gas Purification Equipment midstream gas stations.

Four Core Product Advantages

1 Ultra-Large Dirt Holding Volume
Thick seamless fiberglass winding structure of the fiberglass gas filter stores more solid contaminants, extending replacement cycle by 2-3 times compared with thin filter cartridges.

2 Low Initial Pressure Drop
Uniform fiber arrangement reduces gas flow resistance, saving long-term power consumption of pipeline compressors.

3 Hard Particle Anti-Scratch Protection
Dense media avoids sharp mineral particles piercing downstream coalescer filter cartridge, lowering overall spare part expense.

4 Wide Temperature Corrosion Resistance
Integral anti-rust steel end caps adapt high-sulfur natural gas pipeline working conditions.

Application Scenarios

FG natural gas pre-filter is installed at the front inlet of filter separators in gas gathering stations, compressor rooms, LNG pretreatment terminals and refinery fuel gas pipelines. It forms complete three-stage purification with PCHG coalescer cartridge and SS separator cartridge, fully protecting flow meters, regulating valves and compressors from solid abrasion damage. For industrial water treatment matching demands, we supply full set Water Filter Element (RO & UF Membrane) and front High Flow Filter modules.

Full FG Series Complete Model List

FG12, FG24, FG36, FG72, FG312, FG336, FG536

Other Related Products

PCHG Series Natural Gas Coalescer Filter Cartridge

FAQ About FG Fiberglass Pre-Filter Element

Q1 What is the core function of FG filter element?
A1 This natural gas pre-filter blocks solid impurities like sand and iron sulfide, to protect downstream liquid coalescing filter media from scratch damage.

Q2 Can FG series match PECO filter vessels?
A2 All FG size dimensions are fully interchangeable with standard PECO 75/85 filter separator housings without modification.

Q3 How to judge the replacement time of fiberglass gas filter?
A3 Replace the FG filter element when system differential pressure rises to 12-15 psi, service life depends on inlet solid content of natural gas.

Q4 Can FG cartridge work under high-sulfur gas environment?
A4 Yes, anti-corrosion plated steel end caps and acid-resistant fiberglass media support long-term service for high-sulfur raw natural gas pipelines.