Bell & Gossett 110135 – 1" Bronze ASME Relief Valve, 125 PSI Set, 3,735,000 BTU/hr Capacity

Bell & Gossett 110135 – 1" Bronze ASME Relief Valve, 125 PSI Set, 3,735,000 BTU/hr Capacity

Overview

The Bell & Gossett 110135 Relief Valve is a high-capacity safety valve designed to protect fired and unfired hot water vessels from dangerous overpressure conditions. Engineered to meet ASME Section IV standards for heating boilers, this valve is certified by the National Board of Boiler and Pressure Vessel Inspectors for reliable performance and safety.

With a large effective diaphragm area—approximately five times greater than traditional pop-type relief valves—this model efficiently combats fouling and reduces the risk of water flashing to steam, which can cause damaging system hammering. Rated for a pressure set point of 125 psi and a maximum operating temperature of 250°F, the valve provides robust protection in demanding heating applications.

Key Features

• Certified to ASME Section IV Boiler and Pressure Vessel Code

• High BTU capacity of 3,735,000 BTU/hr, one of the highest in its class

• Bronze body construction with brass internal wetted parts for durability

• EPDM diaphragm and seat for reliable sealing and long service life

• Threaded 1" connection for easy installation

• Low pressure differential between opening and closing for smooth operation

• Designed to prevent steam hammer by minimizing water flashing

Specifications