Parker 71-3C4-4F Hydraulic Hose Valve Fitting 10000 Psi Steel

Product Description

The PARKER 71-3C4-4F is a straight hydraulic hose valve fitting engineered for high-pressure fluid control in demanding hydraulic systems. Manufactured from steel with an NPTF threaded connection, it is rated to 10,000 psi maximum working pressure and handles temperatures from -35 degrees F to 250 degrees F. At 1.96 inches in overall length with a 0.25-inch hose size and 0.25-inch thread size, this fitting is designed for direct in-line installation into hydraulic hose assemblies. Licensed HVAC technicians, pipefitters, and hydraulic system mechanics rely on this type of fitting to maintain leak-free connections under sustained high-pressure load.

The PARKER 71-3C4-4F is suited for industrial hydraulic lines and off-shore drilling applications where consistent sealing and pressure integrity are critical. Its compact straight-body design makes it a practical choice in confined hydraulic assemblies where space and alignment constraints demand a reliable low-profile fitting. The NPTF thread form provides a mechanical seal without relying solely on thread sealant, which is important in high-cycle or vibration-prone environments common to industrial and offshore service conditions.

Key Features

• 10,000 psi maximum working pressure rating for high-demand hydraulic service
• Steel construction for durability in industrial and offshore environments
• NPTF threaded connection delivers a pressure-tight mechanical seal
• Straight body configuration for direct in-line hose assembly installation
• Wide service temperature range: -35 degrees F to 250 degrees F
• 0.25-inch hose size and thread size for precise fitment in standard hydraulic line assemblies

Compatibility

Designed for use with industrial hydraulic lines and off-shore drilling systems. Part of the Parker Series 71 valve fitting line. Verify hose size, thread type, and pressure rating against existing system specifications before installation.

Installation Notes

Installation should be performed by a qualified pipefitter or hydraulic systems mechanic. Depressurize and bleed the hydraulic system fully before removing or installing any fittings. Inspect NPTF threads for damage prior to assembly and apply thread sealant per system requirements and applicable industry standards. Torque to the fitting manufacturer and system design specifications — do not overtighten, as this can damage the NPTF thread form and compromise the seal.