JOHNSON CONTROLS VG7842NT Globe Valve Less Actuator, 1 Inch Connection, 3 Way Mixing, Fnpt

Johnson Controls VG7842NT globe valve is used in commercial buildings, factories and large-scale facilities to manage heating, ventilation and air conditioning applications for optimal environmental conditions. It is designed for heating and cooling systems to regulate fluid flow, maintaining desired temperatures.

Working Mechanism:

• Air pressure adjusts in the actuator and the diaphragm responds to pressure changes.
• Diaphragm movement then controls the valve stem and modulates fluid flow.
• Stem position adjusts for desired flow rate and the system achieves stable fluid regulation.
• Air pressure then fine-tunes stem position and varied flow optimises process control.
• Valve then manages the temperature in systems and the diaphragm mechanism ensures reliable operation.

Features:

• It offers a globe valve design for accurate throttling control and precise flow adjustments.
• This globe valve has a rugged actuator with a die-cast enclosure for robust and reliable operation.
• It comes with an effective 8 sq.inch diaphragm area for expandable fluid flow.
• This valve controls hot or chilled water and can handle 38 psig saturated steam.
• It features a brass valve trim for enhanced durability and performance .
• This globe valve has a maximum supply air pressure of 25 psig and can handle fluid temperatures ranging from 35 to 284 degrees F.

Frequently Asked Questions:

Q. What safety precautions should I take while using this Johnson Controls VG7842NT globe valve?

A.

• Allow trained personnel for installation and operation.
• Wear proper personal protective equipment (PPE).
• Adhere to electrical safety practices.
• Release pressure and depressurise the system before work.
• Implement lockout-tagout procedures during maintenance.
• Follow manufacturer's guidelines and instructions.
• Work in well-ventilated areas with harmful fluids.
• Regularly inspect for wear, damage or leaks.
• Be cautious of temperature extremes.
• Know emergency shutdown procedures.
• Maintain accurate maintenance records.

Q. How do I clean and maintain this globe valve?

A.

• Shut down the valve and disconnect power or pressure sources.
• Wipe the valve's exterior with a damp cloth to remove dirt and debris.
• Check for visible damage or wear on the valve body and components.
• Apply recommended lubricant to moving parts, if applicable.
• Remove covers or panels to access internal components.
• Gently clean internal parts using a soft brush or cloth.
• Inspect diaphragm (if present) for wear or damage.
• Reassemble by putting back covers and panels properly.
• Reconnect power or pressure sources.
• Operate the valve through its full range to ensure proper movement.
• Inspect for leaks around valve connections.

Q. What factors should I consider while choosing a globe valve?

A.

• Application suitability and fluid compatibility.
• Appropriate pressure rating for your system.
• Optimal size and flow control capabilities.
• Material compatibility with fluid, temperature and environment.
• Manual or automated actuation based on control needs.