User Guide

ManualsBrandsBarber Colman ManualsHVAC Replacement Parts2-1/2" Flanged Bronze 3-Way Mixing Valve (74 cv)

Table Of Contents

Application

VB-9313 series three-way mixing valves control hot or

chilled water in heating or air conditioning systems.

These valves must be piped with two inlets (“A” and “B”

ports) and one outlet (“AB” port). They are used for two-

position or proportional control applications. Valve

assemblies require an actuator and a valve linkage that

must be purchased separately.

Danger: Do not use for combustible gas applications.

The VB-9313 series valve packings are not rated for

combustible gas applications, and if used in these

applications, gas leaks and explosions will result.

Features

• Valve sizes 2-1/2" to 6".

• 250 psig pressure rating per ANSI Standards

(B16.15–1985) for screwed cast bronze bodies.

• 125 psig pressure rating per ANSI Standards

(B16.1–1993) for flanged cast iron bodies.

• Spring-loaded TFE packing.

Applicable Literature

• Valve Products Catalog, F-27384

• Cross-Reference Guide, F-23638

• Reference Manual, F-21683

• Application Manual, F-21335

• Valve Selection Guide, F-26094

• Control Valve Sizing, F-13755

• Valve Selection Chart for Water, F-11080

• EN-205 Water System Guidelines, F-26080

VB-9313 Series

2-1/2" and 3" Screwed NPT

2-1/2" to 6" 125 Lb. Flanged

Three-Way Mixing Valves

General Instructions

Typical of VB-9313-0-5-P

2-1/2" to 6"

Typical of VB-9313-0-4-P

2-1/2" and 3"

Summary of content (12 pages)

PAGE 1
VB-9313 Series 2-1/2" and 3" Screwed NPT 2-1/2" to 6" 125 Lb. Flanged Three-Way Mixing Valves General Instructions Application VB-9313 series three-way mixing valves control hot or chilled water in heating or air conditioning systems. These valves must be piped with two inlets (“A” and “B” ports) and one outlet (“AB” port). They are used for twoposition or proportional control applications. Valve assemblies require an actuator and a valve linkage that must be purchased separately.
PAGE 2
SPECIFICATIONS Table-1 Specifications/Models. Valve Body Series VB-9313-0-4-P Specifications Service Valve Body Series VB-9313-0-5-P Chilled or Hot Water Flow Characteristics (Figure-1) Mixing Sizes 2-1/2" and 3" 2-1/2" to 6" Type of End Fitting Screwed NPT 125 lb.
PAGE 3
Table-2 Required Compatible Actuators/Linkages.
PAGE 4
Temperature/Pressure Ratings See Figure-2 for temperature and pressure ratings. Consult the appropriate valve linkage general instruction sheet for the effect of valve body ambient temperatures on specific actuators. Ratings conform with published values and disclaimer. VB-9313-0-4-P (Screwed Cast Bronze Body) Standards: ANSI B16.15–1985 Materials: ASTM B584-93b: UNS C83450, UNS C83600, or UNS C84400 VB-9313-0-5-P (Flanged Cast Iron Body) Standards: ANSI B16.
PAGE 5
VALVE SIZING AND SELECTION Water Two-position Two-position control valves are normally selected “line size” to keep pressure drop at a minimum. If it is desirable to reduce the valve below line size, then 10% of “available pressure” (that is, the pump pressure differential available between supply and return mains with design flow at the valve location) is normally used to select the valve.
PAGE 6
Cavitation Limitations on Valve Pressure Drop A valve selected with too high a pressure drop can cause erosion of discs and/or wire drawing of the seat. In addition, cavitation can cause noise, damage to the valve trim (and possibly the body), and choke the flow through the valve. Do not exceed the maximum differential pressure (pressure drop) for the valve selected.
PAGE 7
INSTALLATION Inspection Inspect the package for damage. If damaged, notify the appropriate carrier immediately. If undamaged, open the package and inspect the device for obvious damage. Return damaged products. Requirements • • • Tools (not provided): Pipe wrenches Training: Installer must be a qualified, experienced technician Appropriate accessories Caution: • Install the valve with the flow in the direction of the flow arrows (“A” and “B” ports are inlets and “AB” port is the outlet).
PAGE 8
Valve Assembly Tighten pipe using this pipe wrench. Use pipe wrench to prevent valve from turning. Figure-4 Installation of Screwed End Valves. Flanged Valve Bodies The VB-9313-0-5-P series flanged valve bodies conform to American Standard 125 Lb. Cast Iron Pipe Flanges. The companion flanges (not provided) should be the same specification as the valve. The 125 lb. flanges have plain flat faces and should not be bolted to a raised faced flange. 1. All parts should be clean to assure the best results. 2.
PAGE 9
TYPICAL PIPING All piping must comply with local codes and ordinances. Refer to Figure-6 through Figure-8 for typical piping. Valve Valve Bypass Coil Return Return Bypass Coil Supply Supply Stem down flow through coil. Stem up flow through coil bypass. Stem up flow through coil. Stem down flow through coil bypass. Figure-6 Typical Piping for Control of Heating or Cooling Coil. System Pump Valve A AB Supply B Bypass Boiler Return Figure-7 Typical Boiler Hot Water Reset.
PAGE 10
CHECKOUT 1. Make sure the valve stem operates freely before installing the valve linkage and the actuator. 2. If the stem does not operate freely, it may indicate that the valve was twisted or crushed during installation or that the stem was bent by rough handling. These conditions may require that the valve be replaced. 3. After the piping is under pressure, check the valve body and the connections for leaks. 4. After the valve linkage and the actuator are installed, check their operation. a.
PAGE 11
DIMENSIONAL DATA Table-8 Dimensions for VB-9313 Series Valves (Figure-9 and Figure-10).
PAGE 12
Table-9 Flange Detail for American Standard 125 lb. Cast Iron Pipe Flanges. (Figure-11). Flanges Drilling Nominal Pipe Size Flange Diameter A B Diameter of Bolt Circle C 2-1/2" 7" 11/16" 5-1/2" 3" 7-1/2" 3/4" 6" 4" 9" 5" 10" 6" 11" Flange Thickness 15/16" 1" Bolting Diameter of Bolt Holes D Number of Bolts 3/4" Length of Machine Diameter Bolts of Bolts E 4 5/8" 7-1/2" 8-1/2" 7/8" 9-1/2" 2-1/2" 3" 8 3/4" 3-1/4" E D B C A Figure-11 Flange Dimensions.