Parker 934331 Desiccant Breather 3-7/8 in Mnpt Plastic

Product Description

The PARKER 934331 is a desiccant breather designed to protect hydraulic reservoirs, gearboxes, and fluid storage tanks from moisture and particulate contamination entering through the vent path. As equipment breathes during thermal cycling or fluid level changes, this breather filters incoming air through a desiccant media that captures water vapor before it reaches the fluid. The plastic housing measures 3-7/8 inches in diameter and 8.7 inches in height, and it uses a standard MNPT thread connection for straightforward installation. It is rated for operation down to -40 degrees F, making it suitable for cold-climate applications. Fluid system technicians and maintenance mechanics typically install this unit.

The PARKER 934331 is used on hydraulic power units, lube oil reservoirs, gearboxes, and bulk fluid storage containers in both industrial and mobile equipment environments. It is appropriate for applications where airborne moisture poses a risk of fluid degradation, corrosion, or premature component wear. The MNPT thread connection fits standard breather ports found on most reservoir filler-breather locations. This breather is sold individually and is well suited for scheduled maintenance replacement programs where breather service intervals are tracked.

Key Features

• Desiccant media removes moisture from incoming air during equipment breathing cycles
• MNPT thread connection fits standard reservoir and gearbox breather ports
• 3-7/8 inch diameter plastic housing is lightweight and corrosion resistant
• Minimum operating temperature of -40 degrees F supports cold-environment service
• 8.7 inch height provides adequate desiccant volume for extended service intervals
• Sold as a single unit for individual replacement or stocking

Compatibility

Designed as a direct-fit desiccant breather replacement for hydraulic reservoirs, gearboxes, and fluid storage tanks equipped with a standard MNPT breather port fitting.

Installation Notes

Installation is typically performed by hydraulic system technicians or industrial maintenance mechanics. Depressurize and isolate the reservoir or gearbox before removing the existing breather. Thread the 934331 into the breather port by hand and snug with a wrench, taking care not to overtighten the plastic housing. Inspect the port threads and sealing surfaces for damage before installation, and follow any applicable facility or equipment OEM service procedures.