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valve mast and actuator torque

valve mast and actuator torque

Maximum Allowable Stem Torque (MAST) - Piping

During valve operation, torque delivered by actuator (Pneumatic or electric) at any stage, should not exceed MAST value. If it happens stem may be subjected to mechanical failure. In some projects it has happened that MAST value calculated by valve vendor was higher than actual, even than it resulted in failure of stem.

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The importance of maximum allowable stem torque

2019-4-9  Maximum allowable stem torque/thrust (MAST) is defined as the maximum torque/thrust that can be applied to a valve train without risk of damage, as defined by the valve manufacturer/supplier [1, 2]. The torque that is applied on the valve train comes from the valve operator, which can be either manual (e.g., a hand wheel plus a gear box operator) or actuated.

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VALVE/ ACTUATOR TORQUE SIZING ANALYSIS CHART

2020-9-28  All value and actuator torque values published 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.

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Valve MAST: Its Relevance and Use in Valve

2019-9-30  The MAST value is the maximum allowable stem torque, defined as the greatest torque to which a valve stem can be subjected to during operation without mechanical failure (Habonim 2017)....

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VALVE/ ACTUATOR TORQUE SIZING ANALYSIS CHART

2017-2-14  Above Actuator is Complete with Bracket (ISO Mounting) and high tensile Adaptor 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.

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How to solve valve mast issues Industry Update

2020-2-6  General Duty like Process On/Off valves – the valve will have an actuator with a torque output of at least 1.3 times the operational torque requirement of the valve (+ 130% or x 1.3 safety) Process Duty like Shut Down and Blow Down valves will have an actuator with a torque output of at least 1.5 times the operational torque requirement of the valve (+150% or x 1.5 times)

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Valve Torques And Actuator Torque Determination

2021-1-18  How the valve will be operated, and how frequently also affect the actuator selection and torque. Infrequent operation will require higher torque values than for valves in modulating services, for example. O 2 cleaning may also increase the torque values for the valves. Service factors are provided at the end of this bulletin. For CRITICAL and SEVERE SERVICE applications along with CAVITY

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Actuator Quesizing Valve - Australian Pipeline Valve

2015-5-14  ETO – open breakout torque: the torque required to move the valve from the fully open position. 70% of stated torque* ETC – closing torque: the torque required to reseat a closing valve. 85% of stated torque* RTC – running torque: the torque needed to keep the ball moving through it’s travel. 50% of stated torque* MAST – Maximum stem torque

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Actuator Selection - Flowserve

2020-1-2  acting actuators are sized based on maximum valve torque, maximum actuator torque. IV. Type of Control Due to breakaway (static) friction, a valve’s torque is highest as it starts to turn. Since a modulating application requires high torque starts and close control over the ball position, a 25% more powerful actuator

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BALON FLOATING BALL VALVE ACTUATOR TORQUE DATA

2018-12-7  Balon Floating Ball Valve Torques (inch pounds) BALON FLOATING BALL VALVE ACTUATOR TORQUE DATA Note: Values are raw torque values for new valves and standard seat materials. Values contain no service factors. Customer should determine appropriate service factors. Use the 285 psi. torque value for pressure differentials of 285 psi. below.

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VALVE/ ACTUATOR TORQUE SIZING ANALYSIS CHART

2020-9-28  All value and actuator torque values published 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.

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VALVE/ ACTUATOR TORQUE SIZING ANALYSIS CHART

2017-2-14  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

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Maximum Allowable Stem Torque (MAST) for Valve - SK

Maximum Allowable Stem Torque (MAST) for Valve. It is maximum allowable torque a stem of a quarter turn valve can be subjected to without mechanical failure. Engineering unit Nm OR lb-in. During valve operation, torque delivered by actuator (Pneumatic or electric) at any stage, should not exceed MAST value. If it happens stem may be subjected ...

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Valve Torques And Actuator Torque Determination

Valve Torques And Actuator Torque Determination Information . EB-2001 Rev. G 6/2021 P a g e 2 of 44 It is the responsibility of the customer to determine the suitability of ASC Engineered Solutions products in their particular application. ASC Engineered Solutions shall not be liable for losses due to errors or omissions from use of this ...

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Valve Torques And Actuator Torque Determination

2021-1-18  actuator selection. The following pages contain valve torque graphs and 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 graphs and tables are breakaway torques from the closed position.

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Actuator Selection - Flowserve

2020-1-2  Five factors affect valve torque and hence, actuator sizing. These are: 1) Seat Materials 2) Service 3) Actuator Design 4) Type of Control 5) Failure Mode of Actuator For sizing applications the following formula should be used. Actuator sizing torque = Basic valve torque x service factor x control factor x design factor

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BALON FLOATING BALL VALVE ACTUATOR TORQUE DATA

2018-12-7  Balon Floating Ball Valve Torques (inch pounds) BALON FLOATING BALL VALVE ACTUATOR TORQUE DATA Note: Values are raw torque values for new valves and standard seat materials. Values contain no service factors. Customer should determine appropriate service factors. Use the 285 psi. torque value for pressure differentials of 285 psi. below.

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Actuator Quesizing Valve - Australian Pipeline Valve

2015-5-14  ETO – open breakout torque: the torque required to move the valve from the fully open position. 70% of stated torque* ETC – closing torque: the torque required to reseat a closing valve. 85% of stated torque* RTC – running torque: the torque needed to keep the ball moving through it’s travel. 50% of stated torque* MAST – Maximum stem ...

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Maximum Allowable Valve Input Torque (MAVIT) -

2013-3-20  ''The maximum torque carrying capacity of a valve at weakest section in drive train assembly'' generally MAST is calculated for the top section of the stem which could be single key or double key section and if we calculate the torque carrying capacity of the same stem at stem groove then it could be lower than the top section torque.

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Actuator MAST Automation Control Engineering

2019-7-16  Can i proceed with Actuator MAST higher than Valve MAST? Thanks in Advance! Cheers . Like Reply. Scroll to continue with content. O. oneye14. Jul 16, 2019 #2 Having now understood MAST (Maximum allowable stem shear torque), it would seem a bad idea to have the Actuator MAST exceeding the Valve MAST as you could end up with a damaged valve.

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Maximum Allowable Stem Torque (MAST) for Valve - SK

Maximum Allowable Stem Torque (MAST) for Valve. It is maximum allowable torque a stem of a quarter turn valve can be subjected to without mechanical failure. Engineering unit Nm OR lb-in. During valve operation, torque delivered by actuator (Pneumatic or electric) at any stage, should not exceed MAST value. If it happens stem may be subjected ...

Get Price

IMTEX corrosion and MAST (Maximum Allowable

2020-6-17  This means that Camtorc Actuators, in contrast to conventional actuator solutions, do not risk damaging the valve by ‘overtorquing’ the stem. This solves a common problem experienced when sizing an actuator for a valve, particularly on MAST sensitive

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Valve Torques And Actuator Torque Determination

Valve Torques And Actuator Torque Determination Information . EB-2001 Rev. G 6/2021 P a g e 2 of 44 It is the responsibility of the customer to determine the suitability of ASC Engineered Solutions products in their particular application. ASC Engineered Solutions shall not be liable for losses due to errors or omissions from use of this ...

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how to calculate valve mast

VALVE/ ACTUATOR TORQUE SIZING ANALYSIS CHART. BTO = Break to open air stroke BTC = Break to close spring stroke MAST = Max stem torque VALVE/ ACTUATOR TORQUE SIZING ANALYSIS CHART FOR TRUNNION BALL VALVES...

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BALON FLOATING BALL VALVE ACTUATOR TORQUE DATA

2018-12-7  Balon Floating Ball Valve Torques (inch pounds) BALON FLOATING BALL VALVE ACTUATOR TORQUE DATA Note: Values are raw torque values for new valves and standard seat materials. Values contain no service factors. Customer should determine appropriate service factors. Use the 285 psi. torque value for pressure differentials of 285 psi. below.

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Actuator Quesizing Valve - Australian Pipeline Valve

2015-5-14  ETO – open breakout torque: the torque required to move the valve from the fully open position. 70% of stated torque* ETC – closing torque: the torque required to reseat a closing valve. 85% of stated torque* RTC – running torque: the torque needed to keep the ball moving through it’s travel. 50% of stated torque* MAST – Maximum stem ...

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Maximum Allowable Valve Input Torque (MAVIT) -

2013-3-20  ''The maximum torque carrying capacity of a valve at weakest section in drive train assembly'' generally MAST is calculated for the top section of the stem which could be single key or double key section and if we calculate the torque carrying capacity of the same stem at stem groove then it could be lower than the top section torque.

Get Price

Manual M49 Quarter-turn Valves: Head Loss, Torque, and ...

2017-3-28  Head loss characteristics must be known to predict valve operating torque, and sys-tem designers also use these data to size a control valve, calculate pump head require-ments, and evaluate the energy costs associated with the head loss across the valve in pumping applications. Valve torque is calculated to allow proper actuator sizing and to

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Actuator MAST Automation Control Engineering

2019-7-16  Can i proceed with Actuator MAST higher than Valve MAST? Thanks in Advance! Cheers . Like Reply. Scroll to continue with content. O. oneye14. Jul 16, 2019 #2 Having now understood MAST (Maximum allowable stem shear torque), it would seem a bad idea to have the Actuator MAST exceeding the Valve MAST as you could end up with a damaged valve.

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Actuator Selection Guide Technical Bulletin No. 1005

2018-10-1  Requirement. This will be the torque needed to size the actuator. 8. If a Media Containment Unit is added between the valve and the actuator, the additional torque listed in Chart 4 must be added to the Total Valve Torque Requirement. This new value will now be the Total Valve Torque Requirement. 9.

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IMTEX corrosion and MAST (Maximum Allowable

2020-6-17  This means that Camtorc Actuators, in contrast to conventional actuator solutions, do not risk damaging the valve by ‘overtorquing’ the stem. This solves a common problem experienced when sizing an actuator for a valve, particularly on MAST sensitive

Get Price

Maximum Allowable Stem Torque (MAST) for Valve - SK

Maximum Allowable Stem Torque (MAST) for Valve. It is maximum allowable torque a stem of a quarter turn valve can be subjected to without mechanical failure. Engineering unit Nm OR lb-in. During valve operation, torque delivered by actuator (Pneumatic or electric) at any stage, should not exceed MAST value. If it happens stem may be subjected ...

Get Price

Actuator Quesizing Valve - Australian Pipeline Valve

2015-5-14  ETO – open breakout torque: the torque required to move the valve from the fully open position. 70% of stated torque* ETC – closing torque: the torque required to reseat a closing valve. 85% of stated torque* RTC – running torque: the torque needed to keep the ball moving through it’s travel. 50% of stated torque* MAST – Maximum stem ...

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how to calculate valve mast

VALVE/ ACTUATOR TORQUE SIZING ANALYSIS CHART. BTO = Break to open air stroke BTC = Break to close spring stroke MAST = Max stem torque VALVE/ ACTUATOR TORQUE SIZING ANALYSIS CHART FOR TRUNNION BALL VALVES...

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Valve Torques And Actuator Torque Determination

Valve Torques And Actuator Torque Determination Information . EB-2001 Rev. G 6/2021 P a g e 2 of 44 It is the responsibility of the customer to determine the suitability of ASC Engineered Solutions products in their particular application. ASC Engineered Solutions shall not be liable for losses due to errors or omissions from use of this ...

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Maximum Allowable Valve Input Torque (MAVIT) -

2013-3-20  ''The maximum torque carrying capacity of a valve at weakest section in drive train assembly'' generally MAST is calculated for the top section of the stem which could be single key or double key section and if we calculate the torque carrying capacity of the same stem at stem groove then it could be lower than the top section torque.

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Limitorque LPC - Flowserve

2020-1-2  actuator output torque and valve torque requirement shall be calculated at least in six points along the valve stroke. In addition, a final check is necessary to guarantee that actuator Maximum Output Torque does not exceed valve Maximum Allowable Stem Torque (MAST). The minimum set of parameters and features necessary for an

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Actuator Sizing Ball Valves - Global Supply Line Valve ...

2020-9-28  ETC – closing torque: the torque required to reseat a closing valve. 85% of stated BTO torque* RTC – running torque: the torque needed to keep the ball moving through it’s travel. 50% of stated BTO torque* MAST – Maximum stem torque *Average guide based on floating ball and smaller size trunnion ball valves.

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Manual M49 Quarter-turn Valves: Head Loss, Torque, and ...

2017-3-28  Head loss characteristics must be known to predict valve operating torque, and sys-tem designers also use these data to size a control valve, calculate pump head require-ments, and evaluate the energy costs associated with the head loss across the valve in pumping applications. Valve torque is calculated to allow proper actuator sizing and to

Get Price

MAST Calculation Valve Stress (Mechanics)

2018-3-4  This is valve manufactures responsibility to calculate and provide valve MAST during engineering stage and ensure torque delivered by actuator is always less than the valve MAST. During offer stage valve MAST furnished in performance table shall be considered as basic value. During engineering stage ideally 3-4 weeks after PO, Valve manufacture ...

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