The Johnson Controls VG7842ET+3008D 3-Way Mixing Valve is used in HVAC systems. This valve is used where it is required that both hot and cold water or any fluid be permitted to mix to produce a required outlet temperature. CV rating of 1.8, which defines the flow capacity, the valve size of 1/2”, and the pressure range of 4 PSI- 8 PSI. It is made from brass material that makes it withstand different harsh conditions that are found in the environment. It is used to maintain stable outlet temperatures by accurately mixing fluids under set conditions.
The VG7842ET+3008D Actuator by Johnson Controls is a space-efficient, 3-way globe valve with a pneumatic actuator, designed for precise control of hot or chilled water, as well as 38 psig saturated steam. This compact and reliable valve finds its applications in diverse settings, such as HVAC systems and industrial processes. Its normally-closed configuration ensures efficiency in regulating fluid flow. The actuator's advanced technology guarantees optimal performance, making it an ideal choice for situations demanding accuracy and reliability in fluid control. Whether employed in climate control systems or industrial processes, the VG7842ET+3008D Johnson Controls actuator stands out as a versatile solution for managing fluid dynamics with precision.
Key features:
3-way mixing valve: Mixes hot and cold fluids (water or steam) to achieve desired temperature.
Normally-closed: Valve remains closed until pressurized air opens it.
1/2" NPT connection: Fits standard 1/2" NPT pipe threads.
Brass trim: Durable and corrosion-resistant for long life.
Pneumatic actuator: Precise control with compressed air.
4-8 psi spring range: Adjustable spring pressure for different flow needs.
Maximum close-off pressure: 339/142 psi (stem up/down).
Compact design: Easy installation in tight spaces.
Signs of a Faulty Johnson Controls Acutator
Reduced flow rate: Lower than expected flow could be due to clogged ports, actuator malfunction, or restricted valve movement.
Hammering or noise: Unusual noises like banging or vibrating during operation could indicate loose parts, internal damage, or flow disruptions.
Inconsistent temperature control: The valve might not maintain the desired mixed fluid temperature, leading to fluctuating temperatures in the system.
Excessive temperature swings: Rapid changes in mixed fluid temperature could indicate malfunctioning controls, actuator issues, or sensor problems.
Inability to reach desired temperature: The valve might not be able to achieve the required mixed fluid temperature due to insufficient flow, incorrect settings, or component failures.
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