Belimo B329 Ball Valve, 1-1/4″ NPT, 10 Cv, 3-Way, Nickel Plated Brass

Description

Belimo B329 Three-Way Ball Valve Overview

The Belimo B329 is a precision-engineered 3-way ball valve designed for demanding chilled water and hot water HVAC applications. Built with a nickel plated forged brass body and a stainless steel ball and stem, this valve delivers long-lasting corrosion resistance and reliable performance in both heating and cooling systems.

Key Features

• 1-1/4″ NPT connection for straightforward installation into standard pipe systems
• 10 Cv flow coefficient for accurate flow control in medium-capacity hydronic systems
• 3-way valve configuration for mixing or diverting applications
• A-port: Equal Percentage flow characteristic for precise, responsive flow modulation
• B-port: Modified flow characteristic engineered for constant common port flow
• Nickel plated forged brass body for superior corrosion resistance and durability
• Stainless steel ball and stem for long service life and leak-tight shutoff
• Rated for chilled water and hot water service up to 250°F maximum

Application

The B329 is ideal for use in commercial and industrial HVAC hydronic systems where precise flow control is critical. Its dual-port flow characteristics make it well suited for fan coil units, air handling units, heat exchangers, and other terminal equipment requiring either mixing or diverting service. The constant common port flow characteristic on the B-port ensures stable system performance across varying load conditions.

Construction & Materials

• Body: Nickel plated forged brass
• Ball and stem: Stainless steel
• Connection type: NPT (National Pipe Thread)
• Pipe size: 1-1/4″
• Maximum temperature: 250°F

Flow Characteristics

• A-port: Equal Percentage — provides a logarithmic relationship between valve position and flow, ideal for modulating control
• B-port: Modified for constant common port flow — maintains consistent flow through the common port regardless of valve position
• Cv: 10

Why Choose Belimo

Belimo is a globally recognized leader in HVAC valve and actuator solutions. The B329 is engineered to pair seamlessly with Belimo actuators, providing a complete, factory-matched valve-actuator assembly for optimized control performance and simplified commissioning.