Ingersoll-Rand 99331811 Pre-Filter Screen for Air Compressors

A Filter Screen (or Strainer Screen) is a perforated or woven barrier designed to physically separate and remove solid particulate contaminants from liquids or gases as they flow through a system. It serves as a fundamental, first-line defense component in filtration, typically used as a pre-filter to protect more sensitive and expensive downstream equipment like pumps, valves, and finer filters from damage, clogging, and wear caused by large debris.

The primary role of a filter screen is coarse filtration and protection. Its specific purposes include:

• Debris Removal: Capturing and retaining large particles such as dirt, scale, pipe slag, welding beads, and other fragments.
• Equipment Protection: Shielding critical components (pumps, control valves, spray nozzles, meters) from abrasive damage and operational failure.
• System Efficiency: Preventing premature clogging of finer, more expensive downstream filters, thereby extending their service life and reducing maintenance costs.
• Process Quality: Ensuring the purity of process fluids in applications where even small contaminants can cause defects.

The operation of a filter screen is straightforward and robust:

1. Contaminated Inflow: The fluid (liquid or gas) enters the strainer body or housing.
2. Screening: The fluid is forced through the screen element. The perforations or mesh openings in the screen allow the fluid to pass through but physically block and retain particles larger than the screen's micron rating or hole size.
3. Clean Outflow: The now-filtered fluid exits the strainer and continues through the system.
4. Contaminant Retention: The trapped debris accumulates on the upstream side of the screen. This debris must be periodically removed via cleaning or screen replacement to prevent a pressure drop across the system.

• Micron Rating / Mesh Size: The size of the openings that determine the largest particle that can pass through (e.g., 100 mesh, 500 micron).
• Material of Construction: 304/316 Stainless Steel (most common, corrosion-resistant), Brass (commercial water), Plastic (PP, PVDF) (chemical compatibility).
• Screen Type: Plain Dutch Weave, Twilled Dutch Weave, Square Mesh.
• Dimensions: Outer Diameter (OD), Inner Diameter (ID), Length, and overall shape.
• Flow Rate & Pressure Drop: Determined by the open area of the screen.
• Pressure and Temperature Ratings: Must be compatible with the system's operating conditions.

Filter screens are ubiquitous across virtually every industry:

• Water & Wastewater: Intake screens, well points, filter press feeds, and irrigation systems.
• Oil & Gas: Pipeline strainers, upstream wellhead protection, fuel and lube oil pre-filtration.
• Chemical Processing: Filtering process fluids, catalysts, and raw materials.
• Food & Beverage: Straining ingredients, protecting homogenizers, and CIP (Clean-in-Place) systems.
• Pharmaceutical: Pre-filtration of process water and solvents.
• Power Generation: Cooling water intake, protecting turbine auxiliaries.
• Manufacturing: Hydraulic and coolant system protection in CNC machines.

• Precision Manufacturing: Our woven and perforated screens are manufactured to exacting tolerances, ensuring consistent and reliable filtration performance.
• Superior Materials: We use high-quality, corrosion-resistant materials to ensure long service life, even in aggressive environments.
• Custom Solutions: We offer custom sizes, shapes, micron ratings, and materials to meet unique application challenges that off-the-shelf screens cannot.
• Expert Application Support: Our technical team can help you select the correct screen type, material, and micron rating to optimize your system's performance and protection.
• Proven Durability: Our screens are built to be cleaned and reused repeatedly, providing exceptional value and reducing waste.

To select the correct filter screen, please provide the following details:

• Application: (e.g., Pump Suction Strainer, Pipeline Protection, Chemical Filtration)
• Housing Type/Model: (e.g., 2" Basket Strainer, 1" Y-Strainer)
• Micron Rating/Mesh Size Required: (e.g., 500 microns, 100 mesh)
• Fluid Media: (e.g., Water, Oil, Chemical Solvent, Steam)
• Operating Pressure & Temperature:
• Material Requirement: (e.g., 316SS, Brass, Polypropylene)
• Dimensions: (OD, ID, Length, and connection type if applicable)

Protect your investment. Ensure optimal system performance and longevity with our high-quality filter screens. Contact our filtration specialists today for a consultation.