Parker 12F-C12L-1-BN-B Check Valve 3/4 Inch Fnpt

Product Description

The PARKER 12F-C12L-1-BN-B is a 3/4 inch inline check valve designed to allow one-directional fluid flow and prevent backflow in pressurized piping systems. The body is constructed from brass, with a nitrile rubber seal and a stainless steel spring. It is rated for a maximum working pressure of 3000 psi and has a crack pressure of 1.00 psi. This valve is installed by licensed plumbers, HVAC technicians, and pipefitters in both fluid and pneumatic line applications where backflow prevention is required.

This check valve is suited for inline installation in residential and commercial piping systems handling fluids compatible with brass body construction and nitrile rubber sealing. The FNPT x FNPT end connections accept standard threaded pipe fittings, making it a straightforward replacement or new-installation component in compressed air, hydraulic, water, and compatible fluid service lines. The 3/4 inch pipe size fits common branch and mainline configurations encountered in trade service work.

Key Features

• Brass body construction provides corrosion resistance in fluid service applications
• Nitrile rubber seal ensures positive shutoff against backflow
• Stainless steel spring maintains reliable crack pressure performance over service life
• 3000 psi maximum working pressure suits high-pressure system installations
• 1.00 psi crack pressure allows flow initiation at low differential pressure
• FNPT x FNPT end connections for standard threaded pipe assembly

Compatibility

Designed as an OEM-style inline check valve for 3/4 inch threaded piping systems using FNPT connections in compressed air, hydraulic, water, and compatible fluid service applications.

Installation Notes

Installation should be performed by a qualified plumber or pipefitter in accordance with applicable local codes and IPC guidelines. Depressurize and isolate the line completely before removing any existing valve or fitting. Apply thread sealant appropriate for the service fluid to all FNPT connections and tighten to hand-tight plus the number of turns specified by the sealant manufacturer. Verify flow direction arrow on the valve body is oriented with the intended flow direction before final pressurization and leak check.