Parker 937491 Suction Strainer Bypass 34 Gpm 4 Inch Npt

Product Description

The PARKER 937491 is a suction strainer with integrated bypass designed for hydraulic and fluid handling applications where line protection and flow continuity are both required. Rated for a maximum flow rate of 189 liters per minute (50 GPM), it features a 4-inch body diameter and connects via a 1-1/2-inch NPT threaded port. The stainless steel screen filters incoming fluid before it reaches pumps and downstream components, while the built-in bypass allows flow to continue if the screen becomes restricted. Overall length is 9.85 inches. This strainer is installed by hydraulic system technicians, industrial maintenance personnel, and fluid power specialists.

The PARKER 937491 is suited for use in hydraulic suction lines on industrial machinery, mobile equipment, and power units where pump inlet protection is required. The threaded NPT connection makes it compatible with standard pipe and fitting assemblies common in North American hydraulic and fluid power installations. The bypass feature is especially useful in applications where uninterrupted flow is critical and scheduled maintenance intervals cannot always be guaranteed.

Key Features

• Maximum flow rate of 189 liters per minute (50 GPM) supports high-demand hydraulic circuits
• Stainless steel screen material provides corrosion resistance and durability in harsh fluid environments
• Integrated bypass valve maintains flow if the screen becomes clogged or restricted
• 1-1/2-inch NPT threaded port for straightforward installation into standard pipe assemblies
• Rated up to 195 degrees F (90 degrees C) maximum working temperature
• Maximum working pressure of 3 psi (0.2 bar), appropriate for low-pressure suction line service

Compatibility

Designed as an OEM-style replacement or new installation suction strainer for hydraulic suction line applications requiring a 4-inch body, 1-1/2-inch NPT threaded connection, and integrated bypass at up to 50 GPM.

Installation Notes

Installation should be performed by a qualified hydraulic technician or fluid power specialist. Depressurize and drain the hydraulic system completely before removing or installing any suction line component. Verify that pipe thread connections are sealed with an appropriate thread sealant rated for hydraulic fluid compatibility. Follow system manufacturer guidelines and applicable fluid power standards when specifying suction line components.