Watson Mcdaniel hd-13-n Pilot-operated Regulator 3/4 Npt

Product Description

The WATSON MCDANIEL hd-13-n is a pilot-operated pressure regulator designed for accurate control of pressure and temperature in steam service applications. Built from ductile iron, this regulator delivers extended pressure and temperature ratings compared to standard cast iron construction. The 3/4 inch NPT connection makes it a direct-fit option for piped steam systems requiring precise downstream pressure regulation. Licensed steam and pipefitters install this type of regulator in commercial and industrial heating systems where tight pressure control is critical to safe and efficient operation.

The hd-13-n belongs to the HD-Series line of pilot-operated regulators from WATSON MCDANIEL. Its pilot-operated design allows for more precise pressure control across a range of flow conditions compared to direct-acting regulators. Typical installations include steam distribution headers, process heating systems, and building heating plants where consistent downstream pressure is required regardless of upstream fluctuations or load changes. The ductile iron body is suited for demanding steam service environments where cast iron would present material limitations.

Key Features

• Pilot-operated design for highly accurate downstream pressure control in steam service
• Ductile iron body construction provides superior pressure and temperature ratings over cast iron
• 3/4 inch NPT connections for standard pipe thread installation
• Suited for steam distribution and process heating applications requiring consistent regulation

Compatibility

Designed as an OEM-style replacement or direct installation regulator for steam service piping systems using 3/4 inch NPT threaded connections.

Installation Notes

Installation should be performed by a licensed pipefitter or steam systems technician familiar with applicable mechanical codes such as the IFGC and ASME guidelines for steam piping. Isolate and fully depressurize the steam system before removing or installing any regulator. Verify that upstream and downstream pressure conditions fall within the rated operating range of the valve before commissioning. Do not overtighten NPT fittings; use appropriate thread sealant rated for steam service.

Technical Specifications

• Body Material: Ductile Iron
• Connection Type: 3/4 inch NPT
• Valve Type: Pilot-Operated Pressure Regulator
• Service: Steam

Standard Information

• Brand: WATSON MCDANIEL
• Manufacturer Part Number: hd-13-n