User Guide

ManualsBrandsBarber Colman ManualsHVAC Replacement Parts2-1/2" Cast Iron Flanged Valve (56 cv)

Application

VB-9223 series single seat, stem up to close, two-way

valves control water from 40 to 281°F (4 to 138°C) or

steam to 281°F (138°C) maximum in heating or air

conditioning systems. They are used for two-position or

proportional control applications. Valve assemblies

require an actuator and a valve linkage that must be

purchased separately.

D A N G E R

Do not use for combustible gas applications. The

VB-9223 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

• TAC Valve Products Catalog, F-27384

• TAC Cross-Reference Guide, F-23638

• TAC Reference Manual, F-21683

• TAC Application Manual, F-21335

• TAC Valve Selection Guide, F-26094

• Control Valve Sizing, F-13755

• Valve Selection Chart for Steam, F-11366

• Valve Selection Chart for Water, F-11080

• EN-205 Water System Guidelines, F-26080

VB-9223 Series

2-1/2" and 3" Screwed NPT

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

Stem Up to Close (Normally Closed)

Two-Way Valves

General Instructions

Typical of VB-9223-0-5-P

2-1/2" to 6"

Typical of VB-9223-0-4-P

2-1/2" and 3"

Summary of content (12 pages)

PAGE 1
VB-9223 Series 2-1/2" and 3" Screwed NPT 2-1/2" to 6" 125 Lb. Flanged Stem Up to Close (Normally Closed) Two-Way Valves General Instructions Application VB-9223 series single seat, stem up to close, two-way valves control water from 40 to 281°F (4 to 138°C) or steam to 281°F (138°C) maximum in heating or air conditioning systems. They are used for two-position 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-9223-0-4-P Specifications Service Valve Body Series VB-9223-0-5-P Chilled or Hot Water and Steam Flow Characteristics (Figure-1) Equal Percentage Sizes 2-1/2" and 3" 2-1/2" to 6" Type of End Fitting Screwed NPT 125 lb.
PAGE 3
100% 90% 80% Flow 70% 60% 50% 40% 30% 20% 10% Closed Figure-1 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 0% Open Stroke Typical Equal Percentage Flow Characteristics. Rangeability Rangeability is the ratio of rated flow to the minimum controllable flow through a valve. The nominal rangeability for VB-9223 series valves is 75:1. Temperature/Pressure Ratings See Figure-2 for temperature and pressure ratings.
PAGE 4
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 5
Steam Two-position Two-position zone valves and direct radiation valves are normally sized using a minimum of 10% of inlet pressure (psig). Proportional Proportional control valves are normally sized using: • • • For low pressure (15 psig or less), use ΔP of 80% of gauge inlet pressure. For steam pressures greater than 15 psig, use ΔP of 42% of absolute (gauge plus 14.7) inlet pressure. When the Cv required is between two valve sizes, select the larger size.
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 WC A U T I O N • Install the valve with the flow in the direction of the flow arrow (“A” port is the inlet 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-9223-0-5 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
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.
PAGE 10
DIMENSIONAL DATA Table-9 Dimensions for VB-9223 Series Valves (Figure-6 and Figure-7).
PAGE 11
Table-10 Flange Detail for American Standard 125 lb. Cast Iron Pipe Flanges (Figure-8). Flanges Drilling Flange Diameter Flange Thickness A B Diameter of Bolt Circle C 2-1/2" 7" 11/16" 5-1/2" 3" 7-1/2" 3/4" 6" Nominal Pipe Size 4" 9" 5" 10" 6" 11" 15/16" 1" Bolting Diameter of Bolt Holes D Number of Bolts 3/4" Diameter of Bolts 4 5/8" 7-1/2" 8-1/2" 7/8" 9-1/2" Length of Machine Bolts E 2-1/2" 3" 8 3/4" 3-1/4" E D B C A Figure-8 F-24386-2 Flange Dimensions.
PAGE 12
Copyright 2008, TAC All brand names, trademarks and registered trademarks are the property of their respective owners. Information contained within this document is subject to change without notice. F-24386-2 TAC 1354 Clifford Avenue P.O. Box 2940 Loves Park, IL 61132-2940 www.tac.