Parker 4Z-V4LN-B Needle Valve 1/4 in Compression Brass Ptfe

Product Description

The PARKER 4Z-V4LN-B is a straight-pattern needle valve designed for precise flow control in compressed gas, hydraulic, and instrumentation lines. Built with a brass body and a polytetrafluoroethylene (PTFE) seal, it handles system pressures up to 3,000 psi. The round handle provides easy manual adjustment, and the compression-by-compression end connections make for a secure, leak-resistant installation without threading. Overall assembled length is 2.3 inches and overall assembled height is 3.06 inches. This valve is installed by licensed plumbers, pipefitters, and HVAC technicians working on high-pressure fluid and gas systems.

This needle valve suits residential and light commercial applications where controlled shutoff or fine flow regulation is required. Compression fittings on both ends accommodate 1/4-inch tubing commonly found in refrigeration lines, instrumentation tubing, gas sampling systems, and hydraulic test circuits. Its compact straight-body profile fits installations where inline needle valves are specified for panel-mounted or line-mounted service.

Key Features

• Straight-pattern body keeps the flow path in line with the pipe run
• Brass body construction provides corrosion resistance in fluid and gas service
• PTFE seal material offers chemical compatibility across a wide range of media
• Round handle allows tool-free manual flow adjustment
• Compression x compression ends accept 1/4-inch tubing without pipe threading
• Rated to 3,000 psi maximum working pressure

Compatibility

Designed as an OEM-style replacement or direct-install needle valve for 1/4-inch compression tubing systems in plumbing, HVAC, refrigeration, and instrumentation applications.

Installation Notes

Installation should be performed by a qualified pipefitter, plumber, or HVAC technician in accordance with applicable local codes and system design requirements. Depressurize and isolate the line completely before removing any existing valve or making new connections. Verify that compression ferrules are properly seated before applying system pressure. Do not overtighten compression nuts, as brass fittings can deform and leak if over-torqued.