T-4002-203 Johnson Controls Thermostat

Overview

The Johnson Controls V46AT-1C is a commercial, pressure-actuated modulating water-regulating valve designed to control the flow of water or glycol solutions in refrigeration systems. It features a direct-acting operation where the valve opens on a refrigerant pressure increase, typically used to regulate head pressure in water-cooled condensers. Constructed with a durable iron body and featuring an ASME flanged connection, this 2-1/2 inch valve is built for reliable performance in open or closed commercial systems using non-corrosive refrigerants like R-12 and R-500.

Features

• Pressure-balanced design ensures the setpoint remains consistent against inlet water pressure variations
• Modulating direct-acting control opens smoothly upon pressure increases
• No close-fitting or sliding parts in water passages to prevent sticking and minimize chatter or water hammer
• Accessible range spring enables easy adjustment and manual flushing if required
• High refrigerant pressure resistant bellows can withstand significant hydraulic shock without damage
• Take-apart construction allows the interior components to be serviced or repaired in-line without pumping down the system

Specifications

• Manufacturer: Johnson Controls
• Model Number: V46AT-1C
• Valve Type: 2-Way Pressure-Actuated Modulating Water-Regulating Valve
• Pipe Size: 2-1/2 inches
• Inlet/Outlet Connection: ASME Flanged (Four-Hole)
• Pressure Connection: 1/4 inch Flare
• Opening Point Range: 70 to 170 psi (483 to 1,172 kPa)
• Body Material: Cast Iron with rust-resisting finish
• Compatible Refrigerants: Non-corrosive types (e.g., R-12, R-500)
• Maximum Water Supply Pressure: 150 psig

Applications

• Regulating the flow of conditioned water or glycol solutions to water-cooled condensers in commercial refrigeration and HVAC systems
• Controlling refrigerant head pressure under standard operating conditions
• Industrial and commercial mechanical setups where steady pressure modulation and robust control are required for non-drinking water lines