Brochure

35F-27855-10
2-Way Stainless Trim
Valves with Soft Seats
Stainless Steel Trim Threaded with Soft Seats
2-Way Stainless Trim
(soft seats)
Threaded NPT
Series Part Number VB-7253-0-4- VB-7263-0-4-
Pipe Sizes
½"…2" ½"…2"
Stem Action
Up Open Up Closed
ANSI Pressure Class
250 psi (up to 400 psi below 150°F)
ANSI Seat Leakage
c
󰀨

Control Media and Temperature

Flow Curve

Allowable ΔP for Water
b
87 psi (600 kPa) Max. for normal life
a
Max. inlet pressure, saturated steam
100 psi (690 kPa)
Max ΔP for sizing, saturated steam
b
80% of inlet pressure up to 15 psig and 42% of absolute (gauge pressure plus 14.7) inlet pressure
above 15 psig inlet
Max ΔP at close-off,
saturated steam
b
󰀨
Size Cv Kvs Rangeability Greater Than Valve Body Part Numbers
½”
0.1 0.09 13:1 - VB-7263-0-4-31
0.22 0.2 18:1 - VB-7263-0-4-33
0.4 0.3
100:1
VB-7253-0-4-01 VB-7263-0-4-01
0.75 0.6 - VB-7263-0-4-34
1.0 0.9 - VB-7263-0-4-36
1.3 1.1 VB-7253-0-4-02 VB-7263-0-4-02
1.8 1.6 - VB-7263-0-4-28
2.2 1.9 VB-7253-0-4-03 VB-7263-0-4-03
2.9 2.5 - VB-7263-0-4-30
3.25 2.8 - VB-7263-0-4-39
4.4 3.8 VB-7253-0-4-04 VB-7263-0-4-04
¾”
5.5 4.8 VB-7253-0-4-05 VB-7263-0-4-05
6.3 5.4 - VB-7263-0-4-41
7.5 6.5 VB-7253-0-4-06 VB-7263-0-4-06
1”
8.2 7.1 - VB-7263-0-4-51
9.0 7.8 - VB-7263-0-4-52
10 8.7 VB-7253-0-4-07 VB-7263-0-4-07
12 10.4 VB-7253-0-4-08 VB-7263-0-4-08
1¼”
14 12.1 - VB-7263-0-4-61
16 13.8 - VB-7263-0-4-62
18 15.6 - VB-7263-0-4-63
20 17.3 VB-7253-0-4-09 VB-7263-0-4-09
1½”
22 19.0 - VB-7263-0-4-71
24 20.8 - VB-7263-0-4-72
28 24.2 VB-7253-0-4-10 VB-7263-0-4-10
2”
31 26.8 - VB-7263-0-4-81
34 29.4 - VB-7263-0-4-82
40 34.6 VB-7253-0-4-11 VB-7263-0-4-11
2. VB-7000 Series
½"…2" Globe Valves
2. VB-7000 Series ½"…2"
Globe Valves
Seat Leakage Classes
ANSI/FCI 70-2
Leakage Class
Maximum Seat Leakage
Class II
0.5% of rated Cv
Class III
0.1% of Rated Cv
Class IV
0.01% of Rated Cv
Class V
0.0005 ml per minute per inch of
󰀨
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.