Belimo B311B+LRB24-SR Valve Assembly 328140-751 requiring a technician to inspect

requiring a technician to inspect the system for venting or flame rollout issues before restoration

the manufacturer recommends total replacement of the SP20172 kit if the sensor was physically exposed to high concentrations of flammable vapors or high moisture to maintain system integrity

ensuring reliable performance without the need for complex leveling during installation

Professional Grade Construction: Manufactured from high-tensile steel with a corrosion-resistant black finish for exterior longevity

Corrosion Resistance: Durable aluminum build protects the system from common environmental degradation and pinhole leaks

Belimo B311B+LRB24-SR Valve Assembly 328140-751 requiring a technician to inspectThe Belimo B311B+LRB24 SR is a precision engineered 3 way characterized control valve (CCV) assembly designed for modulating control of hot or chilled water in HVAC systems. Featuring a 1 2" NPT connection and a flow coefficient of Cv 1. 9, this valve utilizes a chrome plated brass ball and stem to ensure reliable performance in closed loop hydronic circuits. It is paired with the LRB24 SR non spring return actuator, which delivers 45 in lb of torque