Parker 4A-V4LN-B Needle Valve 1/4 Inch Compression Brass Ptfe

Product Description

The PARKER 4A-V4LN-B is a straight needle valve designed for precise flow control in instrumentation, hydraulic, and fluid-handling systems. It features a round handle for manual operation, a compression-style end connection sized for 1/4-inch pipe, and a brass body built to handle demanding service conditions. The valve seat and seal are made from polytetrafluoroethylene (PTFE), which provides chemical resistance and reliable shutoff. Rated to a maximum working pressure of 3,000 psi, this valve is suited for high-pressure applications where leak-free performance is critical. Overall length is 2.3 inches and overall height is 3.06 inches.

This needle valve is used in residential and light commercial applications including HVAC refrigerant lines, compressed air systems, hydraulic control circuits, and process fluid instrumentation. The compression end connection simplifies installation in tubing runs without the need for soldering or flaring. Licensed plumbers, HVAC technicians, and industrial mechanics typically install this type of valve when precise shutoff or metering of gas or liquid flow is required in a compact straight-body configuration.

Key Features

• Straight body configuration for in-line installation in tight spaces
• Compression end connection fits 1/4-inch pipe without soldering or flaring
• Brass body construction for corrosion resistance in fluid and gas service
• PTFE valve seal provides chemical compatibility and positive shutoff
• Rated to 3,000 psi maximum working pressure
• Round handle allows manual flow adjustment with a positive grip

Compatibility

Designed as an OEM-style replacement or direct-fit needle valve for systems using 1/4-inch compression-end connections in high-pressure fluid or gas service applications.

Installation Notes

Installation is typically performed by a licensed HVAC technician, plumber, or pipefitter. Isolate and depressurize the system completely before removing the existing valve or making any connections. Compression fittings should be tightened to manufacturer recommendations using appropriate wrenches — do not overtighten, as this can damage the compression ferrule or valve body. Verify that system pressure does not exceed the 3,000 psi rating of the valve after installation and during system pressurization testing.