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Barber-Colman commercial globe valves, three-way mixing valves, and pneumatic/electric valve assemblies deliver reliable hydronic temperature control across air handling units, fan coils, and boiler loops. Contact our dedicated mechanical sourcing team today to locate your specific Barber Colman globe valve body, packing gland assembly, or pre-assembled motorized valve.
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Worked Examples: Decoding Barber Colman Catalog Numbers
Barber Colman valve part numbers follow a logical alphanumeric sequence that indicates whether the unit is a bare body or a factory-assembled package, as well as its flow pattern, body material, actuator type, pipe size, and flow capacity. Review our technical breakdowns below.
Modulating Electric Globe Valve Assembly
• VS-7213-536-4-5 — 3/4″ Two-Way Normally Open Electric Valve Package
VS (Valve Assembly with Electric/Electronic Actuator) • 721 (Two-Way Stem-Up Open Globe Valve Pattern) • 3 (Cast Bronze Body, Threaded NPT Connections) • -536 (Factory-Mated Actuator Suffix: MS40-7043 24V Proportional Spring-Return Actuator) • -4 (3/4″ Nominal Pipe Size) • -5 (7.5 $C_v$ Flow Coefficient Rating)
Three-Way Mixing Globe Valve Body
• VB-7313-0-4-8 — 1″ NPT Three-Way Mixing Globe Valve Body
VB (Valve Body Only, Bare Assembly without pre-mounted actuator) • 731 (Three-Way Mixing Globe Valve Body Pattern) • 3 (Cast Bronze Body, Threaded NPT End Connections) • -0 (Standard Single-Seat Plug Configuration) • -4 (1″ Nominal Pipe Size) • -8 (14 $C_v$ Flow Coefficient Rating)
Pneumatic Actuated Globe Valve Assembly
• VK-7213-301-4-11 — 2″ Normally Open Pneumatic Valve Package
VK (Valve Assembly with Pneumatic Actuator) • 721 (Two-Way Stem-Up Open / Normally Open Globe Body) • 3 (Bronze Body, Threaded NPT Connections) • -301 (Pre-Mounted Pneumatic Diaphragm Actuator, 3 to 6 psi Spring Span) • -4 (2″ Nominal Pipe Size) • -11 (40 $C_v$ High-Capacity Flow Rating)
Valve Maintenance Tip: When servicing a leaking stem on a Barber Colman VB-7000 series valve, you often do not need to cut the valve out of the pipeline or replace the entire body. Replacement packing gland assemblies (such as the YBA-652-2 packing kit) allow technicians to repack the stem seal in the field under isolated pressure. Always inspect the stainless steel valve stem for scoring or chemical pitting before repacking; a pitted stem will quickly shred new Teflon packing seals, leading to recurring leaks.
Barber Colman Valves FAQ
Maintaining balanced hydronic loops and selecting proper replacement valve bodies requires a clear understanding of product prefixes, porting, and actuator compatibility. Review our expert answers below.
What is the difference between Barber Colman VB, VS, and VK model prefixes?
The prefix identifies whether you are buying a bare valve body or a factory-assembled package:
- VB (Valve Body): A bare valve body without an actuator, intended for replacement of existing plumbing or mating to a field-installed drive.
- VS (Valve System): A complete factory assembly containing a valve body paired with an electric or electronic actuator (e.g., MS40 or MP series).
- VK (Valve Kit): A complete factory assembly containing a valve body paired with a pneumatic diaphragm actuator.
Are legacy Barber Colman VB-7000 and VB-9000 valve bodies still compatible with modern Schneider Electric actuators?
Yes. Because Barber-Colman’s building controls line was integrated into Siebe, Invensys, and ultimately Schneider Electric, the physical dimensions, stroke length, and bonnet threads of the VB-7000 and VB-9000 series remained standardized. Modern Schneider Electric SpaceLogic linear actuators can be mounted onto older Barber Colman valve bodies using standard linkage adapter kits (such as the AV-390 or AV-400 series), avoiding pipe cutting.
How do I choose between a two-way (VB-7213) and a three-way (VB-7313) globe valve?
Two-way valves (VB-7213/VB-7223) have one inlet and one outlet port. They throttle water flow directly to a single heating or cooling coil and are used in variable-flow hydronic systems driven by VFD pumps. Three-way valves (VB-7313 for mixing, VB-8303 for diverting) have three ports. Mixing valves combine two fluid streams into one common outlet, while diverting valves divide one incoming stream into two outlets. Three-way valves are typically used in constant-flow coil bypass loops.
What does the last digit in a Barber Colman valve part number represent?
The final digit or dash-code (such as -4, -8, -10, or -11) represents the valve’s $C_v$ rating (flow coefficient) within a specific pipe size family. For instance, in a 1/2″ NPT body pattern, different internal trim sizes yield different $C_v$ options (e.g., 0.4 $C_v$, 1.6 $C_v$, or 4.4 $C_v$). Matching the exact $C_v$ suffix ensures that the replacement valve maintains proper control authority without causing system hunting or flow saturation.
Ready to locate your replacement Barber Colman valve component?
TCI Supply carries an extensive inventory of active and legacy Barber Colman, Siebe, and Schneider Electric VB-7000 and VB-9000 globe valve bodies, motorized VS assemblies, VK pneumatic valves, and stem repacking kits. Contact our technical team directly at 1-800-755-2883 or email an image of your equipment data plate to receive a fast, competitive quote.
