JOHNSON CONTROLS VG7842ST Globe Valve, 2 In FNPT, 3-Way Mixing, 308 PSI

Johnson Controls VG7842ST hydronic globe valve is an essential component in heating, ventilation and air conditioning (HVAC) systems to regulate the flow of hot or chilled water, maintaining optimal temperature levels. It is used in commercial and industrial settings for controlling water flow in radiators, baseboard heaters, fan coil units and other terminal units.

Working Mechanism:

• This Johnson Controls VG7842ST hydronic globe valve utilises a movable disc or plug positioned within the valve body to regulate the flow of water.
• When actuated, the disc moves to restrict or allow the passage of water through the valve, depending on the desired flow rate.
• This movement is controlled by the actuator, responding to signals from the system controller.
• The valve's design ensures precise control over fluid flow, enabling efficient temperature regulation in hydronic heating and cooling systems.

Features:

• Johnson Controls globe valve features a three-way body pattern for versatility in fluid flow direction and control options.
• It offers vertical installation orientation for easy integration into vertical piping systems.
• This Johnson Controls globe valve includes an NPT port for seamless connectivity, durability and ease of installation.
• It has a bronze body with a stainless steel stem for resistance to corrosion in harsh industrial environments.
• This valve further offers a brass seat known for its excellent sealing properties.
• This valve features a spring return actuator for fail-safe operation in case of power loss.

Frequently Asked Questions:

Q. What is the flow characteristic of this hydronic globe valve?

A. This hydronic globe valve features a linear flow characteristic to ensure a proportional relationship between valve position and flow rate.

Q. What packing material is used in this hydronic globe valve?

A. This globe valve utilises ethylene propylene as packing material, known for its excellent sealing properties and resistance to a wide range of chemicals.

Q. What safety precautions should I take when using this globe valve?

A.

• Ensure proper installation according to manufacturer specifications to prevent leaks or malfunctions.
• Adhere to the maximum pressure rating to avoid overpressurisation and potential valve failure.
• Operate within the specified temperature range to prevent damage or malfunction due to extreme temperatures.
• Confirm fluid compatibility with valve materials to prevent chemical reactions or corrosion.
• Follow proper installation procedures for any actuators and ensure they function correctly to prevent unexpected valve movements.
• Regularly inspect for leaks and promptly address them to prevent property damage or safety hazards.
• Establish emergency procedures and contact information in case of valve malfunction or system failure.
• Provide adequate training for personnel in safe operation, maintenance and troubleshooting.
• Use appropriate personal protective equipment when handling the valve or associated fluids.
• Implement routine maintenance to ensure continued safe and reliable operation of the valve.