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calculation formula torque ball valve

Usually torque is a measured value under known and optimalideal conditions For a single ball valve experienced torque can vary from an observed ideal torque up to about double or triple value over time

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Ball valve Torque Calculation  Pipelines Piping and
Ball valve Torque Calculation Pipelines Piping and

Jan 09 2010 · There are a lot of factors that come to bear on the torque on a ball valve The upstream pressure pushing the ball into its seat is a factor that determines the torque needed to open the valve against shut off pressure The presence or potential for any particulates in the fluid can increase the torque requirement

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Ball Valve Actuator Torque Calculations  Valve
Ball Valve Actuator Torque Calculations Valve

Mar 21 2003 · Ball Valve Actuator Torque Calculations JAlton Mechanical OP The actuator has approx 10 more torque than the ball valve requires However my question remains if I have a Ball Valve in a balanced upstreamdownstream pressure situation do I still need the same torque value

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Maximum Allowable Stem Torque MAST  Piping
Maximum Allowable Stem Torque MAST Piping

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 with

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How To Calculate A Torque For Butterfly Valve  Student
How To Calculate A Torque For Butterfly Valve Student

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

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Breakaway Torque Formula For All Valves  Valve
Breakaway Torque Formula For All Valves Valve

hello I am looking for formula to calculate required torque for following valve Gate Glob Ball Float and Trunnion Or is there any reference for selecting ma Breakaway Torque Formula For All Valves Valve engineering EngTips

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Valve ThrustTorque Calculation  Valve engineering  Eng
Valve ThrustTorque Calculation Valve engineering Eng

so ball valve will often have a MAST max allowabe stem torque and also BTO Break to Open torque required to intiate opening RTO Run to Open the torque required to complete the majotity of the 90° operation and the ETO End to Open Torque required to fully open

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Actuator Selection  Flowserve
Actuator Selection Flowserve

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

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Ball Valve Torques and Actuator Selection Information
Ball Valve Torques and Actuator Selection Information

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

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Flow Calculations and Cv Values  Ball Valves Butterfly
Flow Calculations and Cv Values Ball Valves Butterfly

The formula below allows for calculation of flow rate and pressure drop through a valve with a specified Cv value During the process of valve size selection the same formula is used determine the valve Cv necessary for a required flow rate and desired pressure drop Butterfly valve Cv values vary with the disc angle and valve size

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VALVE ACTUATOR TORQUE SIZING ANALYSIS
VALVE ACTUATOR TORQUE SIZING ANALYSIS

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

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Valve torque requirements  Torque is more than meets the
Valve torque requirements Torque is more than meets the

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

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The importance of maximum allowable stem torque in valves
The importance of maximum allowable stem torque in valves

This paper provides a formula for calculation of MAST in different sections of a valve stem installed on an oil export pipeline Rajesh R Selvakumar V 2014Operating torque in ball valves a

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How To Size Pneumatic Actuators  Cross Company
How To Size Pneumatic Actuators Cross Company

A metal seated ball valve requires a large amount of torque to open or close but also has an elevated torque requirement while traveling A few more terms that your should be familiar with include Saftey factor– A given multiple of the valve’s operating torque to ensure proper operation of the actuator Many customers ask for a 25 safety

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Copeland
Copeland

The greatest torque is at the beginning of each stroke and is called “break torque” As the ball rotates the torque decreases and this is called “run torque” The ball and seat finally returns to the full contact again and as this happens a larger amount of torque “valve ending” or “seating torque” is generated

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Butterfly Valves Torque Head Loss and Cavitation
Butterfly Valves Torque Head Loss and Cavitation

valve design elements and their role in predicting torque head loss and cavitation Valve torque is calculated to allow proper actuator sizing and to provide assur ance that the valve components can withstand the internal forces produced by flowing water and fluid pressure Head loss characteristics must be known to predict torque

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VALVE TORQUE  Islip Flow Controls
VALVE TORQUE Islip Flow Controls

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

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Basic Calculation of Thrust Force and Torque for Gate
Basic Calculation of Thrust Force and Torque for Gate

Engineering Data Calculation Sheet1 Rev2 Basic Calculation of Thrust Force and Torque for Gate Valve Please refer to 3 1 Seating and Unseating Force

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VALVE ACTUATOR TORQUE SIZING ANALYSIS
VALVE ACTUATOR TORQUE SIZING ANALYSIS

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

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33 Design Basis Valve Stem Torque converted to linear
33 Design Basis Valve Stem Torque converted to linear

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 •

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Actuator sizing calculation for Gate  Globe Valves
Actuator sizing calculation for Gate Globe Valves

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

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Control Valve Cv calculation  Valve Sizing Formula
Control Valve Cv calculation Valve Sizing Formula

In deciding the size of the control valve that Port Size we need to calculate the Cv value of the process Calculated Cv by calculating Cv has educated more than 50 years which is involved in such as the Renault number Reynolds number flow rate Flow the Shock Choking the involved joints in pipes Fitting and the other by the values of these

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Calculating Torque With Examples  ThoughtCo
Calculating Torque With Examples ThoughtCo

Oct 18 2018 · In calculations torque is represented by the Greek letter tau τ 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

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Control Valve Basics Sizing and Selection
Control Valve Basics Sizing and Selection

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

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Worcester Controls Actuator Sizing Manual
Worcester Controls Actuator Sizing Manual

3 Determination of Valve Torque Standard Reduced Port Ball Valves The valve torque curves pages 410 show the torque requirements of 1 4 through 10 Worcester Controls ball valves as a function of differ ential pressure across the valve when the ball is in the closed position

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Handwheel Operators and Torque  Valve News
Handwheel Operators and Torque Valve News

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

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What are Bolt Torque Considerations for Valve Packing that
What are Bolt Torque Considerations for Valve Packing that

Dec 17 2011 · Application and maintenance of the manufacturers recommended torque to valve packing is critical to meeting emissions requirements and long service life While approaches to the application of torque for braided and dieformed packing may be different the generally accepted practices are important to all valve packing Torque Calculation

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Trunnion Mounted Ball Valve Cv Valve and Torque
Trunnion Mounted Ball Valve Cv Valve and Torque

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 stem torques at other pressure differential Example calculated stem torque of DN250 PN100 valve at 70bar pressure differential

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