Parker 4F-PR4-VT-SS Plug Valve 3000 Psi 1/4 Inch Fnpt Ss

Product Description

The PARKER 4F-PR4-VT-SS is a 1/4 inch inline instrumentation plug valve rated for 3,000 psi WOG service in 316 stainless steel construction. Designed for one-way flow isolation, this valve uses a wedge handle for positive shutoff and incorporates a Viton seal for compatibility with a broad range of process fluids and gases. FNPT x FNPT end connections on both ports allow direct threaded installation into instrument tubing or small-bore pipe systems. Licensed instrumentation technicians and pipefitters install this valve in high-pressure measurement and sampling lines where tight shutoff and corrosion resistance are required.

This valve is suited for industrial instrumentation applications including pressure gauge isolation, transmitter block valves, and sampling lines operating at pressures up to 3,000 psi. The 316 stainless steel body handles corrosive media and process environments common in chemical, petrochemical, oil and gas, and power generation facilities. Its compact inline profile fits space-constrained instrument manifolds and panel-mounted configurations. The 1/4 inch pipe size and FNPT threading make it a direct-fit choice for standard instrumentation tubing assemblies.

Key Features

• 3,000 psi WOG pressure rating for high-pressure instrumentation service
• 316 stainless steel body for corrosion resistance in aggressive process environments
• Viton seal provides compatibility with a wide range of hydrocarbons, acids, and process gases
• FNPT x FNPT end connections per ANSI/ASME B1.20.1 for standard threaded pipe fitment
• Wedge handle design delivers positive, tactile shutoff confirmation
• Compact inline one-way design suited for instrument isolation and block service

Compatibility

Designed as an OEM-style instrumentation plug valve for 1/4 inch FNPT threaded small-bore pipe and instrumentation tubing systems rated to 3,000 psi WOG.

Installation Notes

Installation should be performed by a licensed pipefitter or instrumentation technician. Depressurize and isolate the instrument line completely before removing or installing any valve. Apply thread sealant compatible with the process media to FNPT connections per applicable piping codes including ANSI/ASME B31.3 for process piping. Do not overtighten threaded connections; follow standard FNPT engagement practice for the pipe size to avoid thread damage.