Parker NV311P-6-4 Straight Needle Valve 3/8x1/4 Brass

Product Description

The PARKER NV311P-6-4 is a straight needle valve designed for precise flow control in compressed air, gas, and fluid systems. It features a brass body and brass needle, with a Poly-Tite tube end on one side and a 1/4 inch NPTF male pipe end on the other. The valve handles working pressures up to 150 psi and operating temperatures from 0 degrees F to 250 degrees F. Overall length is 1.28 inches and overall height is 1.19 inches. This compact, durable valve is typically installed by plumbing, HVAC, or industrial maintenance technicians requiring reliable flow shutoff or throttling in tight quarters.

The NV311P-6-4 suits residential and light commercial applications where a straight inline needle valve is needed to regulate or shut off flow in tubing or pipe runs. The 3/8 inch tube outside diameter Poly-Tite connection pairs with a 1/4 inch NPTF male pipe thread, making it a practical fit for instrumentation lines, control circuits, fuel lines, and similar low-to-medium pressure plumbing assemblies. Its small overall footprint makes it well suited for panel-mounted or close-quarters installations.

Key Features

• Straight valve body for inline installation with minimal space requirements
• Brass body and brass needle construction for corrosion resistance in compatible fluid services
• 150 psi maximum working pressure for low-to-medium pressure systems
• Wide temperature range: 0 degrees F to 250 degrees F
• Poly-Tite to 1/4 inch NPTF male pipe end connection for tube-to-pipe transitions
• Compact dimensions: 1.28 inches overall length, 1.19 inches overall height

Compatibility

Designed as an OEM-style replacement or new-installation needle valve for inline flow control in compressed air, gas, and fluid piping assemblies using 3/8 inch OD tubing with 1/4 inch NPTF male pipe connections.

Installation Notes

Installation should be performed by a qualified plumbing or mechanical technician. Always depressurize and isolate the line before removal or installation of any valve. Apply thread sealant rated for the service fluid to the NPTF male pipe threads as required by the applicable plumbing code. Do not exceed the rated 150 psi working pressure or the 250 degrees F maximum temperature for the service application.