Limitorque Pneumatic Compact Scotch Yoke Actuator Model LPC
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The document discusses the Limitorque Pneumatic Compact (LPC) actuator. The LPC is a robust, lightweight modular Scotch yoke actuator available in spring return and double acting configurations. It has a 25-year design life and maintenance interval of up to 5 years. The LPC delivers precisely controlled torque of up to 5500 Nm and is suitable for actuating valves in industries like oil and gas. It has a modular design and accessories can include lockout modules and manual overrides.
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LPC - 10A SR01- 160B -
MANUALOVERRIDETYPE
PNEUMATICCYLINDERSIZE
example model number
01
02
- JL
JL - JACKSCREW LIGHT
S - SILICON
Z - SPECIAL
SEALMATERIAL
B - BUNA
V - VITON®*
435
080
HOUSINGSIZE
SR - SPRING RETURN
CONFIGURATION
SPRINGCANSIZE
05
YOKETYPE
A - SYMMETRIC
B - CANTED10
12
14
100 DA - DOUBLE ACTING
06
LPC Sizing and Selection
Due to the Scotch yoke mechanism, LPC actuators have a
particular U-shaped output torque curve, whether powered by
a fixed supply pressure or the spring.
For a proper actuator model selection, the safety factors between
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
optimal actuator selection:
• Valve torques, including MAST
• Type of actuator:
- Single Acting/Spring Return: Fail Safe Close (CW) or
Fail Safe Open (CCW)
- Double Acting configuration for Fail Last or
Fail As Is
• Minimum, Normal and Maximum Pneumatic Supply
pressure to the actuator
• Safety Factors requested by the project or by a
specific application
• Working Temperature range
• Open/Close stroking times
• Additional options (manual override, control panel,
limit switch box, positioner,...)
LPC Torque and Pressure Table
Model
MOT
Maximum Operating Torque
Nm (ft-lb)
MOP
Maximum Operating Pressure
barg (PSIG)
MAWP
Maximum Allowable Working Pressure
barg (PSIG)
LPC-05 500 (369)
Variable for every model 12 (174)
LPC-10 1600 (1180)
LPC-12 3500 (2582)
LPC-14 5500 (4057)
LPC Actuator Selection Table
Code Material Temperature Range
Climate Classification
according to IEC60721
B Buna Std Temp: -29°C to +100°C (-20°F to 212°F)
Tropical & Arid
V Viton ®* Hi Temp: up to +160°C (320°F)
S Silicon Low Temp: down to -40°C (-40°F) Temperate
Z Other Special Applications - Consult Factory Cold & Polar
Detailed output torque graphs covering the full valve stroke are
available for both spring return and double acting actuators.
BTO Break to open torque BTC Break to close torque
RTO Running to open torque RTC Running to close torque
ETO End to open torque ETC End to close torque
MAST
Maximum allowable
stem torque
SF Safety factor
Seals Material
Definitions
* For higher output torques, consult factory.
0,825255
0,666667
0 45 90
OutputTorque
Valve Position [°]
Symmetric Scotch Yoke Output Torque
Canted Scotch Yoke Output Torque
Valve demand Torque
Valve Closed Valve Open
0,825255
0,666667
0 45 90
OutputTorque
Valve Position [°]
Symmetric Scotch Yoke Output Torque
Canted Scotch Yoke Output Torque
Valve demand Torque
Valve Closed Valve Open
0 45 90
OutputTorque
Valve Position [°]
Symmetric Scotch Yoke Output Torque
Canted Scotch Yoke Ouput Torque
Valve demand Torque
Valve OpenValve Closed
=
=
=
*Viton is a registered trademarks of E. I. du Pont de Nemours
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Limitorque Pneumatic Compact Scotch Yoke Actuator Model LPC
- 1. Limitorque ® LPC Limitorque Pneumatic Compact Scotch Yoke Actuator Swanson Flo | 800-288-7926 | www.swansonflo.com
- 2. 2 Today’s industry requirements are more rigorous than ever before. Nowhere is this more evident than in the oil and gas industry where new requirements are incorporated into project specifications almost every day. Limitorque has addressed these demanding requirements in the design of their latest fluid power products, the LPC and LPS actuators. This makes LPC and LPS the most technically advanced and market-compliant actuators available anywhere in the world. The LPC actuator features a 25-year design life, depend- ing on service conditions, proper installation, operation and maintenance. In order to achieve this industry-lead- ing design life, in-field maintenance is prescribed to be performed every five years of operation. For high-cycle applications, such as control valve operation, more frequent maintenance of replaceable wear surfaces, as outlined in EN 15714, may be required. To complete the actuation package, LPC actuators are available with accessories such as lockout modules and manual overrides. Limitorque provides engineering design services for mounting hardware to ensure that your actuation solution is ready to handle the toughest challenges. The Flowserve Limitorque portfolio of products makes valve control easier in so many ways — in almost as many ways as the applications they serve. The Limitorque Pneumatic Compact (LPC) range is a robust, lightweight, modular Scotch yoke design available in both spring return and double acting configurations. It is suitable for actuating ball, butterfly and plug valves or any other quarter-turn application. LPC compact actuators deliver up to 5500 Nm* (4057 ft-lb) of precisely controlled torque. The LPC product range is complementary to the Limitorque LPS heavy-duty pneumatic Scotch yoke actuators. A similar design philosophy to the heavy-duty LPS was applied to the new LPC range, delivering enhanced performance and high reliability. The LPC is available in standard as well as special material configurations upon request. LPC actuators are complemented by a comprehensive range of control systems, including ESD, PST and Quick Closing options. A suite of standard controls systems is available for short delivery, but the Limitorque engineering team can design custom solutions for the largest and most complex customer requirements. Limitorque Fluid Power Systems * For higher torque ranges, consult factory. Swanson Flo | 800-288-7926 | www.swansonflo.com
- 3. 3 flowserve.com LPC Limitorque Pneumatic Compact Scotch Yoke Actuators With a 25-year design life* and a maintenance interval up to five years*, the LPC Limitorque Pneumatic Compact actuator is a complementary product to the available range of Limitorque LPS heavy-duty pneumatic Scotch yoke actuators. Features • Spring Return Single Acting (Fail Close CW and Fail Open CCW) and Double Acting (Fail Last / Fail-as-is) executions • Easy field conversion from Fail Close CW to Fail Open CCW configuration or vice versa • Symmetrical and Canted Scotch yoke types to perfectly fit valve torque requirement • Housing constructed in Nodular Ductile Cast Iron; Carbon Steel or different materials of construction available upon request. • Carbon Steel ENP lined Cylinders; Stainless Steel Cylinders, Tie Rods and Spool Pieces available upon request • External Tie Rods cylinder construction; protected Tie Rods version available upon request for offshore applications • Upon request, available in balanced weight configuration, with cylinder and spring installed on opposite sides of central body** • Suitable for use in on/off, modulating and control valve application in general service, protective service and safety applications such as ESD or HIPPS • Full range of accessories: switchboxes, positioners; ESD and PST functionalities; custom control panels; fire protection; manual overrides Specifications • Torque range from 50 Nm (37 ft-lb) up to 5500 Nm (4057 ft-lb)** • Maximum allowable working pressure (MAWP): 12 barg (174 PSIG) • -29°C to 100°C (-20°F to 212°F) standard operating temperature range; Low temperature -60°C (-76°F) and high temperature 160°C (320°F) ranges available upon request (polar, cold, arid and tropical temperature requirements in accordance with IEC 60721) • End mounted adjustable travel stop ± 5°, available also in an enclosed protected version upon request Key Certifications and Standards Compliance • Certified according to ATEX 94/9/EC Ex II 2GD c IIC T6 • NEMA4 and NEMA4X per NEMA 250 • IP66/IP66M and IP67/IP67M certified • SIL 3 certified in accordance with IEC 61508 • Available valve interface in compliance with ISO 5211 • Actuator spring design in compliance with EN 13906 • Corrosion protection in compliance with ISO 12944-2 and EN 15714-3; optionally available up to and including C5-M • Available in compliance with NACE specification MR0175 for sour gas applications • Available in compliance with PED 97/23/EC, ASME BPVC Sec. VIII Div. 1, EN 13445-3 Part 2 for Unfired Pressure Vessels • Manufactured and tested in compliance with ISO 9001 and EN 15714-3 • Available according to CU TR and GOST-R LPC Spring Return With Manual Override LPC Double Acting Without Manual Override LPC Double Acting With Manual Override LPC Spring Return Without Manual Override LPC Modular Design and Accessories LPC Special (Balanced Weight) Configuration, With Cylinder and Spring Installed on Opposite Sides of Central Body * Depending on service conditions, proper installation, operation and maintenance. ** Consult factory for other sizes or for more information. Swanson Flo | 800-288-7926 | www.swansonflo.com
- 4. 4 Anatomy of Limitorque LPC Actuator The LPC range of Limitorque Pneumatic Actuators is a robust, lightweight modular Scotch yoke design, available in both spring return and double acting configurations. The LPC product range is complementary to the already available range of Limitorque LPS heavy-duty pneumatic Scotch yoke actuators. A similar design philosophy to the heavy-duty LPS was applied to the new LPC range, delivering enhanced performance and high reliability. The LPC is available in a selection of standard as well as special materials, upon request. Guide Bar reduces lateral loads, ensures proper alignment and improves wear resistance Output Shaft Yoke Pin Scotch Yoke symmetric or canted configurations with closed yoke slot Adaptor Flange for a true modular design Spring Shot peened and epoxy coated for minimal binding and corrosion inhibition Cylinder honed and polished with either ENP or chrome lining Piston Rod machined and plated to minimize corrosion and friction, “push design” to simplify override installation and quick exhaust configuration Housing or Center Body Guiding Block “The heart of the system” provides directional alignment for the linear forces, transfer of side loads to the guide bar, and transfer of torque to the yoke Retaining Ring Stop Bolt end-mounted adjustable ± 5° 6 7 10 8 11 12 5 24 23 1 Bushing 21 15 20 LPC Spring Return Actuator Swanson Flo | 800-288-7926 | www.swansonflo.com
- 5. 5 flowserve.com Spring Can hermetically sealed, and individually tested for safety and modularity Tie Rod 13 14 End Flange 19 Stop Bolt End mounted adjustable travel stop ± 5°, available also in an enclosed protected version upon request 5 Hex Nut 4 Piston provided with independent seals and wear rings to minimize wear and potential leakage 18Guide Ring 16 End Flange 19Tie Rod 13 Adaptor Flange 11 Guide Bar 6 Guiding Block 23 Output Shaft 7 Stop Bolt 5 Hex Nut 4 *Special or different materials available upon request Cylinder 20 Piston 18 Guide Ring 16Piston Rod 15 Housing 1 Retaining Ring 24 Stop Bolt 5 Scotch Yoke 8 Yoke Pin 10 LPC Double Acting Actuator LPC Standard Materials of Construction* Item Description Material 1 Housing Ductile Iron or Carbon Steel 2 O-Ring NBR 3 O-Ring NBR 4 Hex Nut Carbon Steel 5 Stop Bolt Carbon Steel (with treatment) 6 Guide Bar Alloy Steel (chrome plated) 7 Shaft Alloy Steel 8 Scotch Yoke Ductile Iron or Carbon Steel 9 Washer Carbon Steel 10 Yoke Pin Alloy Steel 11 Adaptor Flange Carbon Steel 12 Spring Spring Steel 13 Tie Rod Alloy Steel (with treatment) 14 Spring Can Carbon Steel 15 Piston Rod Alloy Steel (chrome plated) 16 Guide Ring PTFE + Graphite 17 O-Ring NBR 18 Piston Carbon Steel (with treatment) 19 End Flange Carbon Steel 20 Cylinder Carbon Steel (with treatment) 21 Bushing PTFE + Steel 22 O-Ring NBR 23 Guiding Block Carbon Steel 24 Retaining Ring Stainless Steel Swanson Flo | 800-288-7926 | www.swansonflo.com
- 6. 6 LPC - 10A SR01- 160B - MANUALOVERRIDETYPE PNEUMATICCYLINDERSIZE example model number 01 02 - JL JL - JACKSCREW LIGHT S - SILICON Z - SPECIAL SEALMATERIAL B - BUNA V - VITON®* 435 080 HOUSINGSIZE SR - SPRING RETURN CONFIGURATION SPRINGCANSIZE 05 YOKETYPE A - SYMMETRIC B - CANTED10 12 14 100 DA - DOUBLE ACTING 06 LPC Sizing and Selection Due to the Scotch yoke mechanism, LPC actuators have a particular U-shaped output torque curve, whether powered by a fixed supply pressure or the spring. For a proper actuator model selection, the safety factors between 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 optimal actuator selection: • Valve torques, including MAST • Type of actuator: - Single Acting/Spring Return: Fail Safe Close (CW) or Fail Safe Open (CCW) - Double Acting configuration for Fail Last or Fail As Is • Minimum, Normal and Maximum Pneumatic Supply pressure to the actuator • Safety Factors requested by the project or by a specific application • Working Temperature range • Open/Close stroking times • Additional options (manual override, control panel, limit switch box, positioner,...) LPC Torque and Pressure Table Model MOT Maximum Operating Torque Nm (ft-lb) MOP Maximum Operating Pressure barg (PSIG) MAWP Maximum Allowable Working Pressure barg (PSIG) LPC-05 500 (369) Variable for every model 12 (174) LPC-10 1600 (1180) LPC-12 3500 (2582) LPC-14 5500 (4057) LPC Actuator Selection Table Code Material Temperature Range Climate Classification according to IEC60721 B Buna Std Temp: -29°C to +100°C (-20°F to 212°F) Tropical & Arid V Viton ®* Hi Temp: up to +160°C (320°F) S Silicon Low Temp: down to -40°C (-40°F) Temperate Z Other Special Applications - Consult Factory Cold & Polar Detailed output torque graphs covering the full valve stroke are available for both spring return and double acting actuators. BTO Break to open torque BTC Break to close torque RTO Running to open torque RTC Running to close torque ETO End to open torque ETC End to close torque MAST Maximum allowable stem torque SF Safety factor Seals Material Definitions * For higher output torques, consult factory. 0,825255 0,666667 0 45 90 OutputTorque Valve Position [°] Symmetric Scotch Yoke Output Torque Canted Scotch Yoke Output Torque Valve demand Torque Valve Closed Valve Open 0,825255 0,666667 0 45 90 OutputTorque Valve Position [°] Symmetric Scotch Yoke Output Torque Canted Scotch Yoke Output Torque Valve demand Torque Valve Closed Valve Open 0 45 90 OutputTorque Valve Position [°] Symmetric Scotch Yoke Output Torque Canted Scotch Yoke Ouput Torque Valve demand Torque Valve OpenValve Closed = = = *Viton is a registered trademarks of E. I. du Pont de Nemours Swanson Flo | 800-288-7926 | www.swansonflo.com
- 7. 7 flowserve.com Flowserve brands for most common control accessories: Flowserve Solutions In addition to providing actuators and controls designed to meet or exceed all of today’s rigorous requirements, Flows- erve and Limitorque lead the industry with all of the essential related solutions that our customers need to maintain peak efficiency and productivity. • Aftermarket Parts and Services • Business Assesments • Actuator Inspection, Maintenance and Repair • Engineering and Technical Services –– Engineering Support –– Technical Assessments –– Equipment Performance Analysis and Upgrades • Education and Training –– On-site Training –– Online Training • Asset Data Management and Optimization Solutions Limitorque offers a selection of standard and custom controls packages for most applications to fill customers’ needs for short lead-time, low-cost solutions. • PST • ESD • Quick-closing • Modulating/CV functionality • Quick exhaust valve with flow regulator suitable for closed loop assembly, when required • Cylinder integral quick exhaust valve (double acting fast actuator) • Pneumatic booster (¼ in, ½ in, 1 in size, AL and 316 SS) • 3/2 and 5/2 pneumatic piloted valve with manual reset and override (¼ in, ½ in, 1 in size, AL and 316 SS) • Unidirectional and bidirectional flow regulator valve (¼ in, ½ in, 1 in size, AL and 316 SS) • Compact fittings to reduce pipe and control dimensions (¼ in, ½ in, 1 in size, AL and 316 SS) Electric Actuators and Controls • MX — Non-intrusive, electronic multi-turn actuators • QX — Non-intrusive, electronic quarter-turn actuators • Master station, controller for redundant networked actuators • Network controls, Modbus, Profibus DP/PA, Foundation Fieldbus, DeviceNet, HART • L120 — Electro-mechanical, multi-turn electric actuators with integral and network controls • SMB — Electro-mechanical, multi-turn electric actuators for nuclear and severe duty service • CEA - Compact Electric Actuator Limitorque Additional Product Range Offering One Flowserve Solution Control System Options Gearboxes • V — Bevel gearboxes for manual or motorized operation • WG — Worm gearboxes for manual or motorized operation • SR — Spur gearboxes for manual or motorized operation • Digital Positioners –– LogixTM –– PMVTM • Analog Positioners –– PMV –– AccordTM • Diagnostic Software –– ValveSightTM • Valve Controllers –– AutomaxTM –– Worcester ControlsTM • Limit Switch Boxes –– Worcester Controls –– PMV –– Automax –– Accord Fluid Power Actuators • Scotch yoke pneumatic actuators — LPS • Compact Scotch yoke pneumatic actuators — LPC • Scotch yoke hydraulic actuators — LHS • Compact Scotch yoke hydraulic actuators — LHC* • Linear pneumatic actuators — LPL • Linear hydraulic actuators — LHL* • Direct gas actuators — LDG • Gas over oil actuators — LGO* • Electro-hydraulic actuators — LEH* • Standard and customized controls • Application engineering support *Contact Flowserve for product availability and additional information. Swanson Flo | 800-288-7926 | www.swansonflo.com
- 8. Flowserve Limitorque Fluid Power Systems Product Sales Via Rio Vallone 17 20883 Mezzago (MB), Italy Phone: +39 039 62060 1 Fax: +39 039 62060 213 Email: [email protected] Flowserve Limitorque Fluid Power Systems Manufacturing and Operations Via Rio Vallone 17 20883 Mezzago (MB), Italy Phone: +39 039 62060 1 Fax: +39 039 62060 213 Email: [email protected] Flowserve Limitorque Fluid Power Systems Research and Development Via Belizzi 40/42 29122 Piacenza (PC), Italy Email: [email protected] To find your local Flowserve representative or for more information about Flowserve Corporation, visit www.flowserve.com or call USA 1 800 225 6989 or International +1 972 910 0774 FCD LFENBR0002-03-AQ Printed in USA. October 2016 © 2016 Flowserve Corporation. Flowserve Corporation has established industry leadership in the design and manufacture of its products. When properly selected, this Flowserve product is designed to perform its intended function safely during its useful life. However, the purchaser or user of Flowserve products should be aware that Flowserve products might be used in numerous applications under a wide variety of industrial service conditions. Although Flowserve can (and often does) provide general guidelines, it cannot provide specific data and warnings for all possible applications. The purchaser/user must therefore assume the ultimate responsibility for the proper sizing and selection, installation, operation, and maintenance of Flowserve products. The purchaser/user should read and understand the Installation Operation Maintenance (IOM) instructions included with the product, and train its employees and contractors in the safe use of Flowserve products in connection with the specific application. While the information and specifications contained in this literature are believed to be accurate, they are supplied for informative purposes only and should not be con- sidered certified or as a guarantee of satisfactory results by reliance thereon. Nothing contained herein is to be construed as a warranty or guarantee, express or implied, regarding any matter with respect to this product. Because Flowserve is continually improving and upgrading its product design, the specifications, dimensions and information contained herein are subject to change without notice. Should any question arise concerning these provisions, the purchaser/user should contact Flowserve Corporation at any one of its worldwide operations or offices. © 2016 Flowserve Corporation, Irving, Texas, USA. Flowserve is a registered trademark of Flowserve Corporation. Swanson Flo | 800-288-7926 | www.swansonflo.com