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Johnson Controls VG7842ST - Globe Valve, Brass Trim
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Item #: VG7842ST
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Description 

Johnson Controls VG7842ST Brass Trim Globe Valve used with VA7800 Series Non-Spring Return Electric Actuators. Three-Way Mixing – NPT End Connections.
 

Product Specifications

Size, in.2
Cv 46.2
Closeoff psig46/47
Non-Spring Return - Without Auxiliary switchesVA7810-AGA-2 On/Off (Floating)
VG7842ST+71CAGA
VA7810-HGA-2 (Proportional)
VG7842ST+71CHGA
Non-Spring Return - With Two Auxiliary SwitchesVA7810-AGC-2 On/Off (Floating)
VG7842ST+71CAGC
VA7810-HGC-2 (Proportional)
VG7842ST+71CHGC
VG7000 Brass Trim Globe Valves with VA7800 Series Electric Actuators1
Service2Hot Water, Chilled Water, 50/50 Glycol Solutions, and 38 psig (262 kPa) Saturated Steam for HVAC Systems
Fluid Temperature Limits (Water)35 to 284°F (2 to 140°C)
Fluid Temperature Limits (Steam)38 psig (262 kPa) at 284°F (140°C)
Valve Stroke3/4 in.
Valve Body RatingMeets Requirements of ASME B16.15 Class 250
Valve Assembly Maximum Allowable Pressure/Temperature (Water) 400 psig (2,756 kPa) Up to 150°F (66°C); Decreasing to 365 psig (2,515 kPa) at 248°F (120°C)
Valve Assembly Maximum Allowable Pressure/Temperature (Steam)35 psig (262 kPa) Saturated Steam at 284°F (140°C)
Maximum Recommended Operating Pressure Drop30 psi
Flow CharacteristicsLinear
Rangeability325:1
Actuator Ambient Operating Temperature Limits23 to 131°F (-5 to 55°C)
Leakage0.01% of Maximum Flow per ANSI/FCI 70-2, Class 4
End Connections (NPT)Factory or Field Assembly
End Connections(Sweat)Field Assembly Only
End Connections(Union Globe)Field Assembly Only
End Connections(Union Angle)Field Assembly Only
BodyCast Bronze
Bonnet BrassStem 300 Series Stainless Steel
PlugBrass
SeatBrass Against Molded Elastomeric Disk
PackingSelf-Adjusting Ethylene Propylene Rubber (EPR) Ring Pack U-CupsHot Water
1. In steam applications, install the valve with the stem horizontal to the piping, and wrap the valve and piping with insulation.

2. Proper water treatment is recommended; refer to VDI 2035 Standard.

3. Rangeability is defined as the ratio of maximum controllable flow to minimum controllable flow.