Ball Valve Torque Calculation

API6D ISO 14313 Design specification for Ball valves Reference Calculation for Stem design with Ball joint using Rectangular Circular cross section Calculation 1A Maximum allowable stem torque with 1 key Basis Roark’s formula 28 Table 101 Calculation 1B Maximum allowable stem torque

Maximum allowable stem torquethrust MAST is defined as the maximum torquethrust that can be applied to the valve train without risk of damage as defined by the valve manufacturersupplier

torque again increases but to an amount less then the valve breakaway torque is known as the valve ending torque Due to the variable operating torque of a ball valve when scotch yoke type or spring return actuators are used IFC recommends factoring the breakaway torque by 07 for the running torque and 08 for the valve ending torque

determining the actual ball valve torques to be used for actuator selection The following pages contain valve torque tables for the various Sharpe Valve models along with Media and Service Factors which must be considered Ball Valve Torques The torque values listed in the following tables are breakaway torques from the closed position

Valves are used to control the flow of gases liquids and granular solids They come in many types sizes materials pressure and temperature ratings and means of actuation Gate valves and ball valves are two distinct members of the valve family and are generally used for two different types of flow control

FCD MMASS0008 Ball Valve Actuator Selection Guide 3 A very large percentage of automated ball valves go into onoff service involving clean lubricating media and using TFE hightemperature or highpressure sealing materials For these applications please refer to the torque

Break torque or opening torque refers to the force required to start moving a closed valve Running torque or midstroke torque is the force required to maintain movement of the valve between the open and closed positions Seating torque also called closing torque is the force required to seat a valve into its closed position

BTO Break to open air stroke BTC Break to close spring stroke MAST Max stem torque RTO Running to open air stroke torque VALVE ACTUATOR TORQUE SIZING ANALYSIS CHART FOR TRUNNION BALL VALVES PISTON STYLE SCOTCH YOKE ACTUATOR SIZING CALCULATIONS SHEET LARGER ACTUATORS 2500NM TO 17000NM SPRING RETURN SET SPRING TO CLOSE

Apr 09 2018 · When considering the torque values to operate the valve one must consider How much torque is required to fully open and fully close the valve If the valve gets stuck in mid function of opening or closing the valve a safety factor must also be considered sizing the actuator

Sep 05 2008 · Valve maunufacturers supply tables of required torques for their valves The torque varies between manufacturers and styles of valves and I would never try to calculate it with a generic method Request the table from your supplier

other factors The design calculation is done for sealing cup ball connection adaptor valve housing and operating lever The maximum stress and deflection is calculated for different sealing cup materials under high pressure The torque required to operate the valve which includes breaking torque running torque

valve torque The initial ballseat torque of the valve is results of the seats preload determineby the designer and the seat material The relative high friction arias together with the floating ball design concept which allows the system pressure to force the ball into the downstream seat cause the Ballseat torque to be very sensitive to

There are different frictions in the ball valve aganist openning torque which are packing friction seat friction and unballanced forces I am looking for a sample of torque calculations for a

Apr 09 2018 · When considering the torque values to operate the valve one must consider How much torque is required to fully open and fully close the valve If the valve gets stuck in mid function of opening or closing the valve a safety factor must also be considered sizing the actuator

BTO Break to open air stroke BTC Break to close spring stroke MAST Max stem torque RTO Running to open air stroke torque VALVE ACTUATOR TORQUE SIZING ANALYSIS CHART FOR TRUNNION BALL VALVES PISTON STYLE SCOTCH YOKE ACTUATOR SIZING CALCULATIONS SHEET LARGER ACTUATORS 2500NM TO 17000NM SPRING RETURN SET SPRING TO CLOSE

1 This table of the torque is the valve breaking torque at maximum pressure differential for choosing the operators2 Formula in the table can be used to calculate the

other factors The design calculation is done for sealing cup ball connection adaptor valve housing and operating lever The maximum stress and deflection is calculated for different sealing cup materials under high pressure The torque required to operate the valve which includes breaking torque running torque

Use the SCTCUTC torques for all SCTSUTCS valves 5 For regular bore trunnion valves use the torque for the next smallest full bore valve 6 For 150300 SCTBMUTBM series valves on Pages 45 torque values are for both nonfiresafe and firesafe KITZ INDUSTRIAL BALL VALVE OPERATING TORQUES inchlbs KCA021005REV04 2 VALVE SIZE 100 150

The breakaway torque values listed below do not contain any service or safety factors and are adequate for the operation of Balon ball valves equipped with standard seats and used to control clean liquid or gas at ambient temperature The run torque is approximately 50 or onehalf of the breakaway torque

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 Pull The amount of applied torque depends on the Rim Pull and the Handwheel size Applied torque Rim Pull x

Jan 18 2020 · Valve actuators are a type of control valve and there are many options available to meet plantwide and individual automation requirements While simple in concept consisting of a box with an input output and a mechanism to operate a valve there are actually quite a few considerations in choosing the right valve actuator And because How to Select a Valve Actuator Types of Valve

KF global ball valves are designed manufactured and tested in accordance with API ANSI ASME and BS requirements The following list contains the most important applicable standards for ball valves These valves may be produced in accordance with other international standards on request Specifications Conformance

The result of this calculation shows that the MAST in rectangular section of stem is less than the actuator torque Divya S Rajesh R Selvakumar V 2014Operating torque in ball valves a

Sep 05 2008 · Valve maunufacturers supply tables of required torques for their valves The torque varies between manufacturers and styles of valves and I would never try to calculate it with a generic method Request the table from your supplier

Balon Trunnion Ball Valves Balon offers a rugged four or eight bolt mounting surface for Balon trunnion ball valves The actuation mounting surface can either be installed at the factory or can be installed while the valve is in service

Use the SCTCUTC torques for all SCTSUTCS valves 5 For regular bore trunnion valves use the torque for the next smallest full bore valve 6 For 150300 SCTBMUTBM series valves on Pages 45 torque values are for both nonfiresafe and firesafe KITZ INDUSTRIAL BALL VALVE OPERATING TORQUES inchlbs KCA021005REV04 2 VALVE SIZE 100 150

4 Ball Valves and QuarterTurn Plug Valves ACTUATED BALL VALVE SELECTION Operating Torque Operating torque for a Swagelok 40 series ball valve is influenced by 1cycle frequency packing material system pressure system temperature system media The tables and calculations on this page can be used for 2 and 3way 40

For the torque value required to turn a floating ball valve through its 90° travel consider torque requirements at these five basic positions BTO – break open torque the torque required to unseat the closed valve 100 of the stated torque RTO – opening torque the torque needed to move the valve to the fully open position Average 70

There are different frictions in the ball valve aganist openning torque which are packing friction seat friction and unballanced forces I am looking for a sample of torque calculations for a

There are 4 ball valve torque calculation suppliers mainly located in Asia The top supplying country or region is China which supply 100 of ball valve torque calculation respectively Ball valve torque calculation products are most popular in Eastern Europe Mid East and South America

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 •

Actuator Sizing Calculation for Gate Globe Valves GSLActuatorSizingCalculation R1 AS Information required Examples 1 Bore diameter at seat use actual diameter if known 12 inch 3 inch 3 inch 2 Differential pressure using 30psi minimum and line psi if higher 200 psi 2250 psi 2250 psi

The valve stem rotates a ball which contains an opening The ball opening can be positioned in the fully open or fully closed position but must not be used to throttle flow as any abrasive wear to the ball will cause leakage when the valve is closed Ball valves are considered high recovery valves having a low pressure drop and relatively high

valves comprise a single part The ball and the shaft are separate parts and a shaft blowout is prevented by a separate thrust ringpin and retaining plates A spline driver transmitting the shaft torque to the ball connects the shaft with the ball In 1 and 1 12 valves the shaft directly drives the slot in the ball no separate driver

Valve suppliers typically offer breakaway torque relative to the nominal pressure of the valve In the case of the butterfly valve and the large ball valve it is also common to show breakaway torque relative to reduced media pressures because this will help properly size the actuator for the specific application Safety factor application

On the other hand segment ball valves are limited in availability for extremes of temperature and pressure and are more prone to noise and cavitation problems than globe valves High performance butterfly valves are even less expensive than ball valves especially in

This graph shows the Cv or Kv valve fraction vs opening and closing angle of a full bore ball valve The full closure curve of a ball valve is then the above graph multiplied by the valve’s flow coefficient or factor Cv vs Angle Closure Curve Values Table The tables below list the full Cv vs angle closure and opening curves for various

KF global ball valves are designed manufactured and tested in accordance with API ANSI ASME and BS requirements The following list contains the most important applicable standards for ball valves These valves may be produced in accordance with other international standards on request Specifications Conformance