Compare Model Drawings, CAD & Specs Flange Size Flange Type Nominal Inside Diameter Availability Price
253B-1-40-1
Exhaust Throttle Valve, 1.27 in. ID, NW40 ISO-KF, Flapper O-ring
$2,000
3 Weeks
 253B-1-40-1 Exhaust Throttle Valve, 1.27 in. ID, NW40 ISO-KF, Flapper O-ring NW40 ISO-KF 1.270 in. (32 mm)
3 Weeks
 $2,000
253B-1-40-2
Exhaust Throttle Valve, 1.27 in. ID, NW40 ISO-KF
$2,000
3 Weeks
 253B-1-40-2 Exhaust Throttle Valve, 1.27 in. ID, NW40 ISO-KF NW40 ISO-KF 1.270 in. (32 mm)
3 Weeks
 $2,000
253B-2-50-1
Exhaust Throttle Valve, 1.888 in. ID, NW50 ISO-KF, Flapper O-ring
$2,275
3 Weeks
 253B-2-50-1 Exhaust Throttle Valve, 1.888 in. ID, NW50 ISO-KF, Flapper O-ring NW50 ISO-KF 1.888 in. (48 mm)
3 Weeks
 $2,275
253B-2-50-2
Exhaust Throttle Valve, 2.00 in. ID, NW50 ISO-KF
$2,275
3 Weeks
 253B-2-50-2 Exhaust Throttle Valve, 2.00 in. ID, NW50 ISO-KF NW50 ISO-KF 2.000 in. (51 mm)
3 Weeks
 $2,275
253B-20-2CF-1
Exhaust Throttle Valve, 0.779 in. ID, 2.75 in. CF Flange, Flapper O-ring
$2,325
3 Weeks
 253B-20-2CF-1 Exhaust Throttle Valve, 0.779 in. ID, 2.75 in. CF Flange, Flapper O-ring 2.75 in. CF CF 0.779 in. (20 mm)
3 Weeks
 $2,325
253B-20-2CF-2
Exhaust Throttle Valve, 1.27 in. ID, 2.75 in. CF Flange
$2,325
3 Weeks
 253B-20-2CF-2 Exhaust Throttle Valve, 1.27 in. ID, 2.75 in. CF Flange 2.75 in. CF CF 0.779 in. (20 mm)
3 Weeks
 $2,325
253B-20-40-1
Exhaust Throttle Valve, 0.779 in. ID, NW40 ISO-KF, Flapper O-ring
$2,000
3 Weeks
 253B-20-40-1 Exhaust Throttle Valve, 0.779 in. ID, NW40 ISO-KF, Flapper O-ring NW40 ISO-KF 0.779 in. (20 mm)
3 Weeks
 $2,000
253B-20-40-2
Exhaust Throttle Valve, 0.779 in. ID, NW40 ISO-KF
$2,000
3 Weeks
 253B-20-40-2 Exhaust Throttle Valve, 0.779 in. ID, NW40 ISO-KF NW40 ISO-KF 0.779 in. (20 mm)
3 Weeks
 $2,000
253b exhaust throttle valve
253B-3-80-2
Exhaust Throttle Valve, 3.00 in. ID, NW80 ISO-MF
$2,400
3 Weeks
 253B-3-80-2 Exhaust Throttle Valve, 3.00 in. ID, NW80 ISO-MF NW80 ISO-MF 3.000 in. (76 mm)
3 Weeks
 $2,400
253b exhaust throttle valve
253B-4-100-2
Exhaust Throttle Valve, 3.875 in. ID, NW100 ISO-MF
$2,975
3 Weeks
 253B-4-100-2 Exhaust Throttle Valve, 3.875 in. ID, NW100 ISO-MF NW100 ISO-MF 3.875 in. (98 mm)
3 Weeks
 $2,975
253b exhaust throttle valve
253B-60-63-2
Exhaust Throttle Valve, 2.362 in. ID, NW63 ISO-MF
$2,350
3 Weeks
 253B-60-63-2 Exhaust Throttle Valve, 2.362 in. ID, NW63 ISO-MF NW63 ISO-MF 2.362 in. (60 mm)
3 Weeks
 $2,350

Specifications

  • Type
    253 Exhaust Throttle Valve
  • Valve Type
    Butterfly/Throttle Valve
  • Operating Temperature
    Standard: 0 - 100°C
    Optional: 0 - 150°C
  • Valve Motor Ambient Operating Temperature
    -20 to 40°C
  • Exposed Materials
    316L S.S., Viton®
  • External Leak Rate
    1x10-8 scc/sec He (at shaft seal)
  • Closed Leakage
    <10-7 (Torr l/s)
    (valves with a flapper o-ring)
  • Valve Speed
    1.7 sec (open to close)
  • Drive Output Torque
    Standard speed: 600 in-oz
    High-speed: 170 in-oz
    (with 651 Controller)
  • Resolution
    1/12,000
  • Drive
    Direct gear drive
  • Differential Pressure Across Valve
    1 atm. (15 psig) max

Resources

Manuals
Literature
Technical Notes

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