Parker 937481 Suction Strainer with Bypass 4 Gpm Npt

Product Description

The PARKER 937481 is a threaded suction strainer with an integrated bypass, designed to protect hydraulic and fluid system components from particulate contamination at the inlet side of pumps and circuits. The unit handles a maximum flow rate of 19 liters per minute (approximately 5 GPM) and operates at a maximum working pressure of 3 psi. Its stainless steel screen provides durable filtration in demanding service environments. At 2.67 inches in diameter and 3.1 inches in length, it is a compact, inline device suited for space-constrained installations. Licensed mechanics, hydraulic system technicians, and fluid power specialists are the primary installers of this component.

The PARKER 937481 is used in hydraulic fluid systems where suction-side filtration is required to prevent pump cavitation and contamination ingestion. The 1/2 inch NPT threaded port allows direct connection to standard NPT-tapped fittings and manifolds. The bypass feature ensures system flow is maintained when the screen reaches its pressure differential limit, preventing pump starvation under high-viscosity or cold-start conditions. This strainer is appropriate for both light industrial and mobile hydraulic applications where a compact, threaded suction filter is needed.

Key Features

• Stainless steel screen construction for corrosion resistance and long service life
• Integrated bypass protects pump from starvation when screen differential pressure is reached
• 1/2 inch NPT threaded port for straightforward installation into standard NPT fittings
• Maximum flow rate of 19 liters per minute (5 GPM) suitable for low-to-mid flow hydraulic circuits
• Maximum working temperature of 195 degrees F (90 degrees C) supports a wide range of hydraulic fluid types
• Compact form factor at 2.67 inches in diameter and 3.1 inches in length for tight installation envelopes

Compatibility

Designed as an OEM-style replacement or service part for hydraulic and fluid power systems requiring a 1/2 inch NPT threaded suction strainer with bypass at flow rates up to 5 GPM.

Installation Notes

Installation should be performed by a qualified hydraulic or fluid power technician. Depressurize and isolate the hydraulic circuit completely before removing or installing any suction-side components. Apply appropriate thread sealant to NPT threads per system fluid compatibility requirements, and verify all connections are leak-free before returning the system to service. Refer to the equipment manufacturer's service documentation and applicable fluid power safety standards during installation.