Transcription of Actuator sizing calculation for Gate & Globe Valves
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Actuator sizing calculation for Gate & Globe Valves
Actuator sizing calculation for gate & Globe Valves GSL- Actuator - sizing - calculation R1 - AS Information requiredExamples1 Bore diameter at seat (use actual diameter if known)12 inch3 inch3 inch2 Differential pressure, using 30psi minimum, and line psi if higher200 psi2250 psi2250 psi3 Type of valve and serviceWedge gate , oil Globe , steamGlobe, steam4 Stem diameter and lead of screw thread (pitch x number of starts)1 x 1/3 rising stem1 x rising rotating1 x rising stem5 Travel time/speed in inches per minute (if critical)About 1 minuteMethod Having obtained the above information proceed as followsAObtain bore area (full bore assumed) (1)113 sq sq sq inBDifferential psi200 psi2250 psi2250 psiCObtain valve factor Table A x B x C to obtain seating thrust For rising stem Valves : 7950 lbfYes18200 lbfNo18200 lbfYesEAdd packing friction thrust = 2000 x stem diameter (2)For gate Valves :3500 lbfYes----No3000 lbfNoFAdd piston effect = x diam.
Actuator Sizing Calculation for Gate & Globe Valves GSL-Actuator-Sizing-Calculation R1 - AS Information required Examples 1 Bore diameter at seat (use actual diameter if known) 12 inch 3 inch 3 inch
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