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### how to calculate valve torque

Copeland recommends factoring the break torque by 07 for the running torque and 08 for the valve ending torque as a general guideline Service Factors Service factors are used to help adjust the torque value of a valve to include the additional force required to open and shut a valve ,

Mar 23, 2010· Hi I need to find out how to calculate the torque required to open a 400mm diameter and 85mm thick face butterfly valve in a 10 Bar pipe Please help I hope this is all the necessary.

Valve Torque Calculator by AW Chesterton Company , This tool calculates the gland bolt torque for valves that are packed with Chesterton style 1622 Low Emission Packing or Chesterton style .

Torque is expressed as force x distance to distinguish it from Energy which has the same units but is expressed as distance x force (Example): 100 lbft Torque 100 ftlb Energy Valve Handwheel Torque and Rim Pull: Valves are often operated by turning a Handwheel Operating torque is applied by pulling on the Handwheel Rim That’s called, Rim .

Jun 28, 2019· How to Calculate Torque Torque is best defined as the tendency of force to rotate an object about an axis, fulcrum, or pivot You can calculate torque by using force and the moment arm (the perpendicular distance from an axis to the line.

Oct 12, 2016· Also would it make a difference how the valve is placed, for example if the valve actuator is pointed at 12 o'clock or 7o'clock and we are trying to turn it clockwise I would need to calculate it at a position where the most starting torque would be required to start rotating the ,

Jun 17, 2019· Valve torque; The size and design of the valve and the differential pressure across the valve are also considerations, as well as the stem packing friction, media temperature, and the mechanical characteristics of both the valve and the valve stem Note that for quarter-turn valves, it’s not possible to calculate the valve’s torque demand .

Nov 05, 2012· Ball Valve Torque Calculation – News Details – Zhejiang Onero , Standard ball valves are known as quarter-turn valvThe valve stem rotates a metal ball with a hole drilled in it through a quarter-turn, or 90 degrees, to open , »More detailed * Ball Valve Torque Calculation

Dec 01, 2014· We are trying to calculate the agitator torque for an agitation system What size electrical motor and gearbox is required to drive this agitator? What is the torque? Here are the specs of the tank: Height of tank is 6000 mm; Tank diameter is 3500 mm Here are the specs of the agitator: 4 agitation stages with 4 blades per stage

Once you have selected the type of pneumatic rotary actuator best suited for an application, the next step is to select an appropriate size Here’s a breakdown of the three main design criteria to consider to help you along with the process:

Centrifugal Pumps - Speed Torque Curve Centrifugal pumps and the characteristic speed torque curve , With the discharge valve closed the torque amounts to 30 - 50 % of the nominal torque at full speed , Scientific Online Calculator 6 17

•Butterfly Valve Torque Requirements 8 •Seating/Unseating Torque 8 •Bearing Friction Torque 8 •Dynamic Torque 9 •Recommendations 10 Butterfly Valve Parameters 10 •Butterfly Valve Flow Characteristics 10 Section Vb2: Butterfly Valves * Indicates those sections where changed have occurred since the last printing

Braking Torque Equation and Calculator: Brake torque is the force applied at the brake wheel to stop the motion of the moving equipmentAssuming the operating conditions for the equipment are con- stant, a brake having a retarding torque equal to the full load torque of the motor to which it is applied is usually satisfactory .

MAST (Maximum Allowable Stem Torque) We know ball valves (rotary valves) are used as ESDVs/BDVs in critical services like shutdown, isolation and blow down application As an engineer we always ensure reliability and integrity of actuator and its components However as far as stem components are concerned we either give little attention to mechanical integrity of stem or sometimes ,

33 Design Basis Valve Stem Torque For rotatingstem valves (ball, plug, - and butterfly), the torque needed to operate the valve is a summation of two loads: • stem torque, that is, the reaction torque in Loads not dependent on pressure or flow such as bearing loads and packing loads • ,

(3) Valve factors are based on metallic seats, when valve is new If you foresee seats oxidation or aging during the service, multiply this factors by 125 to 15 depending the severity of seats oxidation or aging Stroking the valve frequently, maintain the seats cleaner and the thrust and torque lower

Calculate the Torque required to lift the Force with the lever arm T = F x d = 4905 N x 05 m = 24525 N-m We cannot perform the lift with this set-up, because the stall torque is smaller than the torque required for the lift We must either shorten the length of the lever arm.

Ok, according to this revolution request Socialist seamates!a very useful calculator is one that can turn Torque into Power and vice versa I proudly present two calculators which can be used for power to the torque (Power to the Torque!) and torque to the power conversion

Intake Valve Size As a good estimate, use the formula below To find out more details, read below the picture intake valve size = (bore)(06) Intake valve size is the diameter at the bottom of the valve and is measured in inch Pictured above are some valves on the left and the valves in their place in the engine on the right

valve torque calculator free download - Torque Calculator, Relief Valve Sizing Calculator, Torque Units Calculator, and many more programs

(2) Bearing Torque - The torque required to overcome friction forces on the valve shaft bearing surfaces (3) Dynamic Torque - Torque due to fluid forces which tend to close the valve The torques for resilient seated valves tabulated in this section are the sum of (1) and (2) above for various shutoff pressur

torque that is applied to the valve The effects of the increased dynamic torque are more significant in larger butterfly valves since dynamic torque is a function of the diameter raised to the third power If the increased dynamic torque is larger than the torque that the valve was built to withstand, valve or actuator failure could result

Pneumatic actuators come in many design types, but all share the same need for basic understanding of how their torque operates a valve Whether you size a valve yourself, or you get someone else to do it, accuracy is critical Incorrectly sizing an actuator can lead to a multitude of problems Sometimes an actuator will have enough torque to open a valve but not enough to close it

Braking Torque Equation and Calculator: Brake torque is the force applied at the brake wheel to stop the motion of the moving equipmentAssuming the operating conditions for the equipment are con- stant, a brake having a retarding torque equal to the full load torque of the motor to which it is applied is usually satisfactory Symbols used:

Motor Torque Calculation Tel: (86)755-26434369 1 Web site: leadshine Motor Torque Calculation Selecting the proper motor and driver to meet a specific application needs motor torque calculation Generally speaking, the user can follow the below ,

Dec 20, 2018· Torque is significant for the development of a powerful modern engine Torque and rotation speed are the physical quantities needed to calculate mechanical power Torque calculation for actuator is also an important component of testing With the help of torque transducers, the in-line torque measurement is performed

All Torque Values are theoretical, however where required we will torque test prior to despatch The real valve torque value can be higher depending upon the following listed factors as these factors can drastically increase (or decrease) the torque Please advise if any of the following factors are applicable

Basic Calculation of Thrust Force and Torque for Gate Valve Please refer to CSheet-3 1 Seating and Un-seating Force without Double-block & Bleed Valve (1) For Disc Area: - 1 - , Basic Calculation of Thrust Force and Torque for Globe Valve (Turned Stem Type) 1 Seating Force

Oct 18, 2018· Torque is a vector quantity, meaning it has both a direction and a magnitude This is honestly one of the trickiest parts of working with torque because it is calculated using a vector product, which means you have to apply the right-hand rule

butterfly valve at an angle opening between 0°and 90° is shown in the Dynamic Torque section of this manual Note that the dynamic torque includes all internal friction torque valu CONClUSION In most applications for butterfly valves, especially 20˝ (508mm) or smaller, the maximum torque required to operate the valve will