Calculate rising-stem wedge gate valve stem thrust, operating torque and handwheel rim force from seat load, piston effect and packing friction — supporting rigid wedge (GG) and flexible wedge (TG) configurations.
Gate valve actuator sizing requires accurate thrust and torque predictions, yet many engineers still rely on rough estimates or vendor spreadsheets. An under-sized actuator fails to seat the valve; an over-sized one wastes money and may damage the stem. This calculator decomposes every force component so you can verify your sizing with confidence.
Supports GG (rigid wedge, coeff 0.35) and TG (flexible wedge, coeff 0.25) closing force models.
Separates seat closing force, piston effects (f6/f7/f21), packing friction (f3) and stem thread resistance for transparent results.
Built-in metric (10-3 to 120-16) and imperial (0.25-1 to 3-2) thread database with auto-populated dg, db and RM coefficients.
Computes opening thrust, closing thrust and pneumatic opening thrust in one pass — covers manual, electric and pneumatic actuator scenarios.
Automatic F0/M0 selection values with 30% safety margin, ready to specify on actuator data sheets.
Normal and impact rim forces per MSS SP-91 impact factor table — verify operator effort compliance.
Choose Rigid Wedge (GG) or Flexible Wedge (TG) — the coefficient adjusts automatically.
Input seat bore diameter d, nominal diameter DN, handwheel diameter D, and inlet/outlet pressures P1/P2.
Select from 60+ metric and imperial thread specifications — stem diameter, gland diameter and RM coefficients fill automatically.
Press Calculate to see all intermediate forces, thrust, torque, selection values and handwheel forces immediately.
Enter your valve parameters below and get instant stem thrust, operating torque and handwheel force results.