Overview
The Johnson Controls VG7241ST+823C00 is a pneumatic valve and actuator assembly designed to regulate the flow of hot water, chilled water, or saturated steam in HVAC systems. It combines a 2-way, normally open cast bronze globe valve with an MP82 spring return pneumatic actuator, providing reliable control and failsafe operation.
Features
- Industrial-grade drawn-steel actuator with an electro-painted finish for corrosion resistance
- Over one million cycles tested for longevity and reliable operation
- In-place valve repacking simplifies maintenance and serviceability
- Spring return action ensures a normally open position upon loss of pneumatic pressure
- Cast bronze body with brass trim provides durable performance
Specifications
- Valve Size: 2 inches (FNPT connection)
- Flow Coefficient (Cv): 46.2 with an equal percentage flow characteristic
- Nominal Spring Range: 3 to 7 psig (actuator diaphragm area of 25 sq. in.)
- Maximum Supply Air Pressure: 25 psig (172 kPa)
- Static Pressure Rating: ANSI Class 250 (up to 400 psi maximum allowable pressure)
- Media Temperature Range: Water from 35 to 284°F (2 to 140°C); saturated steam up to 38 psig
Applications
- Designed for regulating fluid flow in commercial and industrial HVAC building automation systems
- Controls hot water or chilled water distribution networks
- Suitable for low-pressure steam applications up to 38 psig saturated steam lines
- Ideal for environment monitoring and precise climate zoning systems requiring equal percentage control dynamics



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