Parker S71-3N4-4F Hydraulic Hose Valve Fitting 5000 Psi

Product Description

The PARKER S71-3N4-4F is a straight hydraulic hose valve fitting rated for 5,000 psi maximum working pressure. Built from stainless steel and threaded to NPTF standards, it is designed for use in demanding fluid-power and hydraulic systems. The fitting accepts 1/4 inch hose and features a 1/4 inch thread size with a straight body profile. At 1.84 inches overall length, it is a compact, durable connection point suited for high-pressure line assemblies. Licensed hydraulic technicians and industrial maintenance professionals install this fitting as part of Series 71 hydraulic system infrastructure.

This fitting is specified for industrial hydraulic lines and off-shore drilling applications where corrosion resistance and pressure integrity are critical. The stainless steel construction makes it well suited for wet, salt-laden, or chemically aggressive environments. The NPTF threaded connection provides a pressure-tight seal without requiring secondary sealant when properly torqued to standard practice. It is appropriate for both new installations and replacement of worn or damaged hose valve fittings in existing high-pressure hydraulic circuits.

Key Features

• 5,000 psi maximum working pressure for high-demand hydraulic service
• Stainless steel construction resists corrosion in harsh and offshore environments
• NPTF threaded connection delivers a pressure-tight seal
• Straight body profile simplifies inline hose-to-valve connections
• 1/4 inch hose size and 1/4 inch thread size for consistent, predictable fitment
• Rated from -35 degrees F to 250 degrees F for broad temperature range service

Compatibility

Designed for industrial hydraulic lines and off-shore drilling applications as part of the Parker Series 71 hydraulic fitting family. Compatible with 1/4 inch hydraulic hose assemblies using NPTF threaded connections.

Installation Notes

Installation should be performed by a qualified hydraulic technician or industrial mechanic. Depressurize and bleed the hydraulic system completely before removing or installing any fitting. NPTF threads are designed to seal on the thread form itself — inspect threads for damage before assembly and follow standard industry practice for thread engagement. Verify that the fitting material and pressure rating are compatible with the system fluid and operating conditions before placing the line back in service.