Midland Industries 46505 High Pressure Check Valve 1/4 Mip X Fip

Product Description

The MIDLAND INDUSTRIES 46505 is a high pressure check valve designed to allow one-directional flow while preventing backflow in demanding fluid and gas systems. Built with a brass body, stainless steel ball, stainless steel spring, and a Buna-N seal, this valve delivers reliable shutoff performance up to 2500 psi at temperatures up to 180 degrees F. The 1/4-18 NPT thread size and MIP x FIP end connections make it straightforward to integrate into existing threaded piping runs. It is installed by licensed plumbers, pipefitters, and HVAC technicians working on high-pressure applications where backflow prevention is required.

This check valve is suited for residential and light commercial piping systems where high pressure ratings and compact size matter. Its 0.187 inch opening, combined with stainless steel internal components, makes it appropriate for compressed air, hydraulic, and fluid service lines. The MNPT x FNPT connection style allows in-line installation without special adapters in standard threaded piping configurations.

Key Features

• 2500 psi maximum working pressure for demanding service conditions
• Brass body construction for corrosion resistance in fluid applications
• Stainless steel ball and spring for long service life and reliable seating
• Buna-N seal suitable for a broad range of fluid and gas media
• MIP x FIP (MNPT x FNPT) ends for direct in-line threaded installation
• Compact footprint at 1.15 inches length for tight installation spaces

Compatibility

Designed as an OEM-style replacement or new-installation check valve for threaded piping systems using 1/4 in MNPT x FNPT connections rated for high-pressure service.

Installation Notes

Installation should be performed by a qualified plumber or pipefitter following applicable IPC or IFGC guidelines. Depressurize and isolate the line completely before removing any existing fitting or valve. Apply thread sealant or PTFE tape to male threads per standard practice, and torque to hand-tight plus a wrench turn appropriate for brass fittings to avoid overtightening. Verify flow direction arrow or inlet/outlet orientation before final make-up.