Parker M325-4201 Pressure Reducing Valve 250 Psi

Product Description

The PARKER M325-4201 is a proportional control pressure reducing valve rated for a maximum working pressure of 250 psi. It is designed to reduce incoming line pressure down to a controlled outlet range of 3 to 21 psi, making it suitable for fluid control applications in commercial and industrial piping systems. The valve body is constructed from bronze and connects via 1-inch Female NPT ports. With a temperature range of -40 degrees F to 400 degrees F, this valve handles demanding service conditions. Installation is performed by licensed plumbers or pipefitters working on pressure regulation systems where consistent downstream pressure is critical.

This valve is intended for use in commercial and industrial fluid systems requiring stable downstream pressure regulation. The proportional control design responds continuously to changes in inlet pressure, maintaining a steady reduced output without the pressure spikes common in on-off style regulators. Typical applications include process piping, boiler feed systems, and other high-pressure fluid handling installations where inlet pressure must be stepped down to a safe working range before reaching downstream equipment or controls.

Key Features

• Maximum inlet pressure of 250 psi for demanding commercial and industrial service
• Reduced pressure range of 3 to 21 psi for precise downstream pressure control
• Bronze body construction for corrosion resistance in fluid handling applications
• 1-inch Female NPT connections for standard threaded pipe installation
• Wide operating temperature range: -40 degrees F to 400 degrees F
• Proportional control design maintains stable outlet pressure across varying inlet conditions

Compatibility

Designed as an OEM-style proportional control pressure reducing valve for commercial and industrial piping systems requiring 1-inch Female NPT connections and a 3 to 21 psi reduced pressure output range.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Shut off and depressurize the upstream supply line completely before removing the existing valve or making any threaded connections. Use appropriate thread sealant rated for the service fluid and temperature range on all NPT connections. Do not exceed the 250 psi maximum inlet pressure rating during system commissioning or pressure testing.