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Environmental & Combustion Controls
VP512A1726
Unit Vent Valve, 1 in. end, 10 Cv

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Overview
A normally open, single seated, straight-through or angle globe valve used for proportional control of steam or hot water in unit ventilator applications. Replacement devices are available for Johnson, Powers, Robertshaw, Barber-Colman, and older Honeywell devices.

Product Prices
Package Type Product Base Price($) Order Quantity
U
1 + $439.58
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Features

• Equal percentage, high lift throttling guide provides accurate control over wide load variations.
• Molded replaceable composition disc for tight shut-off.
• Replaceable brass seat.
• Self-adjusting, spring-loaded Teflon™ packing.
• Back-seating allows repacking without shutting down or draining system.
• Rotatable actuator for aligning air connection with control air piping.
• Integral union connection to simplify installation and service.
Product Specifications  Back To Top
Description Unit Vent Valve, 1 in. end, 10 Cv
Body Pattern Two-way, Straight-through
Capacity (Cv) 10 Cv
Capacity (Kv) 8.57 Kv
Spring Range (psi) 3 psi to 8 psi
Spring Range (kPa) 21 kPa to 55 kPa
Valve Action Proportional Normally Open
Valve Type Globe Valve
Type of End Connection Outlet - External NPT Union
Type of End Connection Inlet - Internal NPT
End Connection Size (in.) 1 in.
End Connection Size (mm) 25 mm
Body Pressure (psi) 150 psi
Maximum Diaphragm Pressure (psi) 25 psi
Maximum Diaphragm Pressure (kPa) 172 kPa
Dimensions (in.) 5 1/8 in. diameter x 7 15/32 high
Dimensions (mm) 127 mm diameter x 190 mm high
Temperature Range (F) For Water: 115 F to 240 F
Temperature Range (F) For Steam: 212 F to 275 F
Maximum Actuator Temperature (F) 160 F
Air connections Dual barbed for 5/32 in. or 1/4 in. plastic tubing
Controlled Medium Steam
Controlled Medium Water
Operating Humidity Range (% RH) 5 to 95% RH
Maximum Temperature Differential (F) For Water: 140 F
Close-off Ratings at Branch Line Pressure 78 psi at 13 psi

Literature and other Resources Download Back To Top
Installation Instructions - (VP512A Unit Ventilator Valve - English/French)
Service Data - (VP512A Unit Ventilator Valve)
Specification Data - (VP512A Unit Ventilator Valve VP512A)
Close-off ratings at various branch line pressures for Penumatic Valves Graph(LineArt)
Close-off ratings at various branch line pressures for Penumatic Valves Graph(LineArt - Web Quality Image)
Approximate dimensions for the VP512 Unit Vent Pneumatic Control Valve Dimension(LineArt)
Approximate dimensions for the VP512 Unit Vent Pneumatic Control Valve Dimension(LineArt - Web Quality Image)
Unit Vent Pneumatic Control Valve Dimension(LineArt)
Unit Vent Pneumatic Control Valve Dimension(LineArt - Web Quality Image)
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Dimensional Diagram
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Product Accessories
312817AA - Actuator Assembly, 3 to 8 psi, 21 to 55 kPa, and 1/2 in. stroke.
312817AB - Actuator Assembly, 6 to 11 psi, 41 to 76 kPa and 1/2 in. stroke.