Product Selection: Brass Trim Threaded with Soft Seats
Selection Guide
Threaded NPT
Threaded NPT
2-Way Brass Trim Body Type
Series Part Number
Pipe Sizes
Stem Action
ANSI Pressure Class
ANSI Seat Leakage
b
Control Media and Temperature
Flow Curve
Allowable ΔP for Water
b
Max. inlet pressure, saturated steam
Max ΔP for sizing, saturated steam
Max ΔP at close-off, saturated steam
Designed to ANSI V with ANSI IV above 35 psi (241 kPa) close off. Long term seat leakage dependent on
20…281°F (-7 to 138°C) water (up to 60% glycol/water solution), low pressure, saturated, treated steam
b
b
80% of inlet pressure up to 15 psig and 42% of absolute (gage pressure plus 14.7) inlet pressure above 15
VB-7213-0-4-VB-7223-0-4-
½"…2"
Up OpenUp Closed
250 psi (up to 400 psi below 150°F)
proper water conditioning maintenance of the system.
Modified Equal Percentage
87 psi (600 kPa) Max. for normal life
35 psi (240 kPa)
psig inlet
Inlet pressure (35 psi) (actuator must be rated to provide close-off pressure)
a
SizeCv KvsRangeability greater thanValve Body Par t Numbers
0.4 0.3100:1VB-7213-0-4-01VB-7223-0-4-01
1.3 1.1100:1VB-7213-0-4-02VB-7223-0-4-02
½”
2.2 1.9100:1VB-7213-0-4-03VB-7223-0-4-03
4.4 3.8100:1VB-7213-0-4-04VB-7223-0-4-04
5.5 4.8100:1VB-7213-0-4-05VB-7223-0-4-05
¾”
7.5 6.5100:1VB-7213-0-4-06VB-7223-0-4-06
108.7100:1VB-7213-0-4-07VB-7223-0-4-07
1”
14 12.1100:1VB-7213-0-4-08VB-7223-0-4-08
20 17.3100:1VB-7213-0-4-09VB-7223-0-4-09
1¼”
28 24.2100:1VB-7213-0-4-10VB-7223-0-4-10
1½”
40 34.6100:1VB-7213-0-4-11VB-7223-0-4-11
2”
a To minimize noise, ensure the flow rate in the piping is less than 10 ft (3M) / Second and the differential pressure is less than 35 psi (241 kPa), operating
with differential pressures above 35 psi may result in additional noise but is acceptable up to 87 psi (600 kPa). Operating within the cavitation zone
may result in noise and internal valve damage.
b Maximum recommended differential pressure in open position. Do not exceed recommended differential pressure (pressure drop), as integrity of
a,e To minimize noise, ensure the flow rate in the piping is less than 10 ft (3M) / Second and the differential pressure is less than 35 psi (241 kPa), operating with
differential pressures above 35 psi may result in additional noise but is acceptable up to 87 psi (600 kPa). Operating within the cavitation zone may result in noise
and internal valve damage.
b Maximum recommended differential pressure in open position. Do not exceed recommended differential pressure (pressure drop), as integrity of parts may be
affected. Exceeding maximum recommended differential pressure voids product warranty.
c The VB-7214-0-4- and VB-7224-0-4- ½"…2" series valves all have rangeabilities greater than 100:1.
d These part numbers do not have RoHs compliant nuts and tail pieces.
½” I.D.½"…2"
250 psi (up to 400 psi below 150°F)
Designed to ANSI V with ANSI IV above 35 psi (241 kPa)
ANSI IV
close off with long term seat leakage dependent on proper
water conditioning
maintenance of the system.
Modified Equal Percentage
35 psi (240 kPa)
80% of inlet pressure up to 15 psig and 42% of absolute (gauge pressure plus 14.7)
inlet pressure above 15 psig inlet
Inlet pressure (actuator must be rated to provide close-off pressure)
c
c
c
c
c
c
cd
cd
cd
cd
cd
VB-7224-0-4-01
VB-7224-0-4-02
VB-7224-0-4-03
VB-7224-0-4-04
VB-7224-0-4-05
VB-7224-0-4-06
VB-7224-0-4-07
VB-7224-0-4-08
VB-7224-0-4-09
VB-7224-0-4-10
VB-7224-0-4-11
e
c
c
c
c
c
c
cd
cd
cd
cd
cd
Seat Leakage Classes
ANSI/FCI 70-2
Leakage Class
Class II0.5% of rated Cv
Class III0.1% of Rated Cv
Class IV0.01% of Rated Cv
Class V0.0005 ml per minute per inch of orifice diameter per psi differential
Product Selection: Brass Trim Soft Seat Union for Radiators and Other Applications
Union Angle NPTUnion Straight NPTUnion Straight NPT
2-Way Brass Trim Body Type
Series Part Number
Pipe Sizes
Stem Action
ANSI Pressure Class
ANSI Seat Leakage
e
VB-7211-0-3-VB-7211-0-4-VB-7221-0-4-
½"…1¼”
Up OpenUp OpenUp Closed
250 psi (up to 400 psig below 150°F)
Designed to ANSI V with ANSI IV above 35 psi (241 kPa) close off with long term
Class IV
seat leakage dependent on proper water conditioning
maintenance of the system.
Control Media and
Temperature
Flow Curve
Allowable ΔP for Water
b
Max inlet pressure
for saturated steam
Max ΔP for sizing,
saturated steam
Max ΔP at close-off,
saturated steam
SizeCv Kvs
0.40.35:1VB-7211-0-3-01VB-7211-0-4-01
1.31.115:1VB-7211-0-3-02VB-7211-0-4-02
2.21.925:1VB-7211-0-3-03VB-7211-0-4-03
½”
4.43.840:1–VB-7211-0-4-04
b
b
Rangeability
Greater Than
c
20…281°F (-7 to 138°C) water (up to 60% glycol/water solution), low pressure, treated steam
Modified Equal Percentage
35 psi (241 kPa)
Max. for normal lifea
87 psi (600 kPa) Max. for normal lifed
35 psi (240 kPa)
80% of inlet pressure up to 15 psig and 42% of absolute (gauge pressure plus 14.7)
inlet pressure above 15 psig inlet
Inlet pressure (35 psi) (actuator must be rated to provide close-off pressure)
Valve Body Par t Numbers
c
c
c
c
VB-7221-0-4-01
VB-7221-0-4-02
VB-7221-0-4-03
VB-7221-0-4-04
c
c
c
c
5.04.340:1VB-7211-0-3-04––
5.54.850:1VB-7211-0-3-05VB-7211-0-4-05
7.56.560:1–VB-7211-0-4-06
¾”
c
c
VB-7221-0-4-05
VB-7221-0-4-06
c
c
8.57.450:1VB-7211-0-3-06––
108.760:1–VB-7211-0-4-07
1412.160:1VB-7211-0-3-07VB-7211-0-4-08
1”
c
c
VB-7221-0-4-07
VB-7221-0-4-08
c
c
1613.875:1VB-7211-0-3-08––
1¼”
2017.375:1–VB-7211-0-4-09
c
VB-7221-0-4-09
221975:1VB-7211-0-3-09––
c
a,d To minimize noise, ensure the flow rate in the piping is less than three meters (10ft)/second and the differential pressure is less than 35 psi (241 kPa). Operating
within the cavitation zone or an operating differential pressure above 35 psi (241 kPa) may result in noise and internal valve damage.
b Maximum recommended differential pressure in open position. Do not exceed recommended differential pressure (pressure drop), as integrity of
parts may be affected. Exceeding maximum recommended differential pressure voids product warranty.
c The VB-7211-0-4-xx and VB-7221-0-4-xx series valves all have rangeabilities greater than 100:1.
e Refer to Seat Leakage Classes table.
a To minimize noise, ensure the flow rate in the piping is less than 10 ft (3M) / Second and the differential pressure is less than 35 psi (241 kPa), operating with
differential pressures above 35 psi may result in additional noise but is acceptable up to 87 psi (600 kPa). Operating within the cavitation zone may result in noise and
internal valve damage.
b Maximum recommended differential pressure in open position. Do not exceed recommended differential pressure (pressure drop), as integrity of parts may be
affected. Exceeding maximum recommended differential pressure voids product warranty.
c Refer to Seat Leakage Classes table.
Product Selection: Stainless Steel Trim Threaded with Metal to Metal Seats
Threaded NPT
2-Way Stainless Trim (Metal to Metal)
Body Type
Series Part NumberVB-7273-0-4-VB-7283-0-4-
Pipe Sizes
Stem Action
ANSI Pressure Class
Seat Leakage
c
Control Media and Temperature
Up OpenUp Closed
250 psi (up to 400 psig below 150°F)
20…400°F (-7 to 204°C) water (up to 60% glycol/water solution),
low pressure, treated steam
Flow Curve
Allowable ΔP for Waterb
87 psi (600 kPa) Max. for normal life
Max Inlet Pressure, saturated steam
Max ΔP for sizing,
saturated steam
Max ΔP at close-off,
saturated steam
b
b
80% of inlet pressure up to 15 psig and 42% of absolute (gauge
pressure plus 14.7) inlet pressure above 15 psig inlet
Inlet pressure (150 psi) (actuator must be rated to provide close-
SizeCvKvsRangeabilityValve Body Part Numbers
0.40.35:1VB-7273-0-4-01VB-7283-0-4-01
½”
¾”
1¼”
1½”
1.31.115:1VB-7273-0-4-02VB-7283-0-4-02
2.21.925:1VB-7273-0-4-03VB-7283-0-4-03
4.43.840:1VB-7273-0-4-04VB-7283-0-4-04
5.54.850:1VB-7273-0-4-05VB-7283-0-4-05
7.56.560:1VB-7273-0-4-06VB-7283-0-4-06
1”
2”
108.760:1VB-7273-0-4-07VB-7283-0-4-07
1210.475:1VB-7273-0-4-08VB-7283-0-4-08
2017.375:1VB-7273-0-4-09VB-7283-0-4-09
2824.275:1VB-7273-0-4-10VB-7283-0-4-10
4034.675:1VB-7273-0-4-11VB-7283-0-4-11
½"…2"
ANSI III
Modified Linear
a
150 psi (1034 kPa)
off pressure)
Selection Guide
a To minimize noise, ensure the flow rate in the piping is less than 10 ft (3M) / Second and the differential pressure is less than 35 psi (241 kPa), operating with
differential pressures above 35 psi may result in additional noise but is acceptable up to 87 psi (600 kPa). Operating within the cavitation zone may result in noise
and internal valve damage.
b Maximum recommended differential pressure in open position. Do not exceed recommended differential pressure (pressure drop), as integrity of parts may be
affected. Exceeding maximum recommended differential pressure voids product warranty.
c Refer to Seat Leakage Classes table below.
Seat Leakage Classes
ANSI/FCI 70-2
Leakage Class
Class II0.5% of rated Cv
Class III0.1% of Rated Cv
Class IV0.01% of Rated Cv
Class V0.0005 ml per minute per inch of orifice diameter per
Two-way valves with brass plugs have modified equal percentage flow curves and valves with stainless steel plugs have
modified linear flow curves. With modified equal percentage flow curves, for equal increments of valve stem stroke,
the change in flow rate with respect to valve stroke may be
expressed as a constant percent of the flow rate at the time
of the change. The change of flow rate with respect to valve
stroke is relatively small when the valve plug is near the valve
seat and relatively high when the valve plug is nearly wide
open. With modified linear flow curves, the flow is directly proportional to the valve stem position.
100%
90%
80%
70%
60%
50%
Flow
40%
30%
20%
10%
0%
ClosedOpenStroke
316 Stainless Trim
Modified Linear
0%
10%
20%
30%
Brass Trim
40%
50%
Modified
Equal
Percentage
60%
70%
80%
90%
100%
Temperature 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-72xx-0-4-P (Cast Bronze Body)
Standards: Pressure to ANSI B16.15 Class 250 with 400 psig
up to 150° F decreasing to 321 psig at 281° F, ASTM B584
A valve selected with too high a pressure drop can cause erosion of seals 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.
Do not exceed the maximum differential pressure (pressure drop) for the valve selected.
The following formula can be used on higher temperature water systems, where cavitation could be a problem, to estimate the
maximum allowable pressure drop across the valve:
Pm = 0.5 (P1 – Pv)
Where:
Pm = Maximum allowable pressure drop (psi)
P1 = Absolute inlet pressure (psia)
Pv = Absolute vapor pressure (psia)
Note: Add 14.7 psi to gauge supply pressure to obtain absolute pressure value. For example, if a valve is controlling 200°F water
at an inlet pressure of 18 psig, the maximum pressure drop allowable would be:
Pm = 0.5 [(18 + 14.7) – 11.53] = 10.6 psi
(Vapor pressure of 200°F water is 11.53 psia)
If the pressure drop for this valve is less than 10.6 psi, cavitation should not be a problem. Systems where cavitation is shown
to be a problem can sometimes be adjusted to provide higher downstream back pressures. Valves having harder seat materials
should be furnished if inlet velocities cannot be lowered.
Vapor Pressure Of Water Table
Temp
(°F)
400.12900.701402.891909.34
500.181000.951503.7220011.53
600.261101.281604.7421014.12
700.361201.691705.9922017.19
800.511302.221807.5123020.78
Pressure
(psia)
Temp.
(°F)
Pressure
(psia)
Temp.
(°F)
Pressure
(psia)
Temp.
(°F)
Pressure
(psia)
Seat Leakage Classes
ANSI/FCI 70-2
Leakage Class
Class II0.5% of rated Cv
Class III0.1% of Rated Cv
Class IV0.01% of Rated Cv
Class V0.0005 ml per minute per inch of orifice diameter per psi differential
Maximum Seat Leakage
Water Capacity Graph Instructions
To Select the approproate valve Cv from the Graph:
1. Select the required flow from the “Flow in GPM” axis.
2. Select available pressure drop from the “Pressure Drop in psi” axis.
3. Select the appropriate line and follow to the Capacity Cv (Kv) listing to choose the closest valve Cv flow coefficient.
4. Confirm the selection by calculation from the water equations (optional).
a. Values are for saturated steam (K = 1). Left column under each inlet pressure is for two position control, and right column is for proportional control.
Differential Pressure (psi)
Two
Position
0.21.60.54181.5122142.516
0.51.50.92.41.53.52.04.42.45.12.95.8
1.23.22.05.23.27.64.3105.3116.413
2.25.93.79.55.8147.8179.7201223
4.1117.0181126153318382244
5.4159.3241535204424512958
7.11912311945255732663876
1027174326623579449252105
12322052327643965311264129
1643276942101571277014884169
1848307747113631427916694190
2465411056415386192107225127257
2774461197317398219121255145292
30815113180191107240133281159321
34935915092218123275153322182368
4111170178110260146328182383217438
4512176195120284160359199419237479
4612579202124295166372206434246497
4913384214131312176393218460260526
5414793238146347195437243511289584
65177112285175416234525291613347701
76206130333204485273612340715405818
87236149380234555312700388817463935
982651674282636243517874379195211052
10929518647529269439087448510215791168
12032420452332176342996253411246361285
131354223571351832468104958212266941402
153413260666409971546122467914308101636
1694572887374531075605135575215838971811
1855013168084971179663148782517369841986
21859037295158413877801749970204311572337
Prop.
a
a
Two
Position
Prop.
Two
Position
Prop.
Two
Position
Prop.
Two
Position
Prop.
Two
Position
Prop.
Always select the correct valve series for the inlet steam pressure as shown below:
Valve SeriesMax Inlet Pressure for
Saturated Steam
VB-7273-0-4-, VB-7283-0-4-, VB-7275-0-4-, VB-7285-0-4-150 psi (1034 kPa)20 to 400°F (-7 to 204°C)
VB-7253-0-4-, VB-7263-0-4-, VB-7255-0-4-, VB-7265-0-4-100 psi (690 kPa)20 to 340°F (-7 to 171°C)
a. Values are for saturated steam (K = 1). Left column under each inlet pressure is for two position control, and right column is for proportional control.
3.46.63.87.34.38.05.29.67.4139.717
7.4148.4169.418112116292137
132615291732213830533968
2549295532603972569973127
34663873438052967413297170
44855095561056712497172126221
60118691327714593172134238175306
741458416194177114211164291214373
97191111212124233150278216384282492
109214124238139262168311242431315552
148289168322188354228421328583427747
168329191366214402259479372662485849
185362210402235443285526410729534934
2114142404612695073276034698356121069
2524932865483206033897185599947281273
27553931360035066042578561110867961392
28555932462136368444181463311268251443
30259234365838572446686167011928741528
33665838173142780551895774513259711697
4037894588775139666221149894159011652037
4709215341024598112772613401043185513592376
53710526101170684128782915311192212015532716
60411846871316769144893317231341238517473055
671131576314628541609103719141490264919413395
738144783916099401770114021061639291421363734
8051578916175510251931124422971788317923304074
94018411068204711962253145126802086370927184753
104020391183226713242494160729672309410730095262
114122361297248614532736176232542533450433005771
134226311526292517093219207338292980529938836790
Prop.
a
a
Two
Position
Prop.
Two
Position
Prop.
Two
Position
Prop.
Two
Position
Prop.
Two
Position
Selection Guide
Prop.
Always select the correct valve series for the inlet steam pressure as shown below:
Valve SeriesMax Inlet Pressure
for Saturated Steam
VB-7273-0-4-, VB-7283-0-4-, VB-7275-0-4-, VB-7285-0-4-150 psi (1034 kPa)20 to 400°F (-7 to 204°C)
VB-7253-0-4-, VB-7263-0-4-, VB-7255-0-4-, VB-7265-0-4-100 psi (690 kPa)20 to 340°F (-7 to 171°C)