Midland Industries 36140SS Ball Check Valve 8000 Psi Nptf

Product Description

The MIDLAND INDUSTRIES 36140SS is a short-style ball check valve designed for high-pressure grease fitting applications in hydraulic and lubrication systems. Built from 303 stainless steel, this compact check valve features a 1/4-28 NPTF thread and a 0.31-inch hex for wrench installation. It is rated to 8000 psi, making it suitable for demanding industrial and commercial service environments. At 0.54 inches in overall length and weighing 0.01 pounds, it is designed to fit in tight spaces where a standard-length check valve would not. Licensed tradespeople and lubrication system technicians install this fitting as part of grease manifold assemblies and high-pressure lubrication lines.

This ball check valve is used in grease fittings and centralized lubrication systems where backflow prevention is required at high operating pressures. The short-style body makes it a practical choice for installations with limited clearance around grease ports, hydraulic panels, or machinery lubrication banks. It is suited for both stationary industrial equipment and mobile machinery requiring periodic lubrication maintenance.

Key Features

• Rated to 8000 psi for high-pressure lubrication and grease system service
• Short-style body at 0.54 inches overall length for tight-clearance installations
• 303 stainless steel construction for corrosion resistance in demanding environments
• 1/4-28 NPTF thread for pressure-tight connections without additional sealant
• 0.31-inch hex drive for standard wrench installation
• Thread length of 0.18 inches for secure engagement in grease fittings and manifolds

Compatibility

Designed as an OEM-style replacement for short-style ball check fittings in high-pressure grease and centralized lubrication systems using 1/4-28 NPTF threaded ports.

Installation Notes

Installation should be performed by a qualified technician familiar with high-pressure lubrication systems. Always depressurize and relieve system pressure before removing or installing check valves. Use an appropriately sized wrench on the 0.31-inch hex to avoid distorting the fitting body. Inspect the thread and seat condition before installation to ensure a leak-free connection at rated pressure.