Parker 4-4 Vlo-s 45 Degree Male Elbow Orfs X Nptf

Product Description

The PARKER 4-4 VLO-S is a 45-degree male elbow compression tube fitting designed to connect 1/4-inch OD tubing to a male NPTF port using an O-Ring Face Seal (ORFS) interface. Constructed from zinc-plated steel, this fitting provides corrosion resistance in hydraulic and fluid system applications. It is rated for a maximum working pressure of 6000 psi, making it suitable for high-pressure lines where a leak-free connection is critical. Licensed hydraulic technicians and fluid power specialists install this type of fitting in industrial, mobile, and stationary hydraulic systems.

This fitting is used in hydraulic plumbing where a 45-degree routing change is required and where an ORFS-to-NPTF transition is needed. The ORFS end provides a metal-to-metal seat with an elastomeric O-ring for a positive seal under dynamic and static pressure. The NPTF thread end engages tapered pipe thread ports, sealing through thread deformation rather than sealant alone. Typical installations include hydraulic power units, mobile equipment manifolds, and industrial machinery fluid circuits where space constraints call for an angled fitting rather than a straight connection.

Key Features

• 45-degree male elbow geometry for angled tube routing in tight installations
• ORFS x NPTF end connections provide a dual-standard transition in a single fitting
• Zinc-plated steel construction for corrosion resistance and durability
• Rated to 6000 psi maximum working pressure for high-pressure hydraulic service
• 1/4-18 NPTF thread size conforms to tapered pipe thread sealing standards
• 1/4-inch tube OD compatibility for standard small-bore hydraulic tubing

Compatibility

Designed as an OEM-style replacement or service fitting for hydraulic systems requiring a 1/4-inch OD tube ORFS connection transitioning to a 1/4-18 NPTF male port.

Installation Notes

Installation should be performed by a qualified hydraulic technician or fluid power specialist. Depressurize and isolate the hydraulic circuit completely before removing or installing any fittings. Inspect the ORFS O-ring seat and the mating port face for nicks or contamination prior to assembly, and replace the O-ring if damaged. NPTF threads are designed to seal through thread interference, but follow the fitting manufacturer and system OEM torque guidelines for final assembly.