V47AC-12C Johnson Controls MODULATING Valve

Overview

The Johnson Controls V47AC-12C is a temperature-actuated modulating water regulating valve designed for heating applications in commercial HVAC and industrial systems. It automatically regulates the flow of water or glycol mixtures to maintain a desired temperature at the sensing bulb, opening gradually as the temperature at the bulb increases. It features a pressure-balanced design that keeps the setpoint independent of fluctuations in inlet water pressure while protecting the range spring from the media.

Features

• Pressure-balanced design safeguards the valve against gradual or sudden water pressure changes
• Internal mechanism seals water away from the range spring, guides, and sliding parts to prevent sedimentation and corrosion
• Constructed with a durable brass body and only five corrosion-resistant metal parts in contact with water
• Designed to minimize chatter and water hammer during operation
• Easy manual flushing and simple in-line disassembly for straightforward repair and part replacement
• Equipped with an internal bypass option to ensure continuous minimum flow when required

Specifications

• Model Number: V47AC-12C
• Pipe Size: 3/4 inch NPT connection
• Body Style: Angle configuration
• Temperature Range: 75°F to 135°F (24°C to 57°C)
• Capillary Length: 6 feet armored capillary
• Bulb Dimensions: 11/16 inch diameter x 3-1/4 inch length
• Temperature Bulb Style: Style 4 (closed tank immersion with 1/2 inch NPT male fitting)
• Maximum Bulb Temperature: 155°F (68°C), or 20°F above maximum range temperature
• Maximum Water Temperature: 170°F (77°C)
• Maximum Supply Water Pressure: 150 psig (1,034 kPa)

Applications

• Used on heat exchangers to regulate cooling or heating media for optimal temperature control
• Maintains safe operating temperatures for internal combustion engines and air compressors
• Regulates temperatures in hydraulic oil systems and cooling systems
• Utilized in hydronic heating, industrial printing machinery paint controls, and commercial air conditioning loops
• Suitable for cooling water conservation and recovery strategies in closed or open loops