brochure rtc

8
Total capability in valve actuation Pneumatic actuators RT C series

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Page 1: Brochure RTC

Total capability in valve actuation

Pneumatic actuatorsRTCs e r i e s

Page 2: Brochure RTC

2 - RT series

STI’s know-how and application experience enable us to develop products, services, and solutions that deliver proven performance and reliability according to customers’ expectations; for these reasons we are leader in valve actuation technology. RT Series is a complete range of pneumatic and hydraulic quarter turn actuators with materials

selected to withstand the most hostile environment conditions, suitable for all Onshore and Offshore applications, covering the general On-Off valve and Modulating Control Valve duties. RT Series is designed to provide maximum reliability and flexibility to cover a wide range of valves in all pressure classes, with a full range of STI’s accessories and control

ReliableRugged carbon steel housing and high-strength alloy steel scotch-yoke ensure safe and reliable operation. Heavy-duty

nickel or chrome plated cylinder. Housing is not under pressure, reducing points

of leakage and simplifying maintenance. For spring return, cylinder seals can be replaced safely without spring removal.

StrongThe housing, although watertight, is coated internally for long-lasting

corrosion resistance. Stainless Steel travel stops allow fine stroke adjustment between 82° and 98°.

Compact quarter turn actuators

Page 3: Brochure RTC

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RT series - 3

Double acting or spring return compact design

Totally sealed weatherproof housing that provides complete protection for all moving parts

Housing is manufactured in carbon steel material without any cast/grey/ductile iron or aluminum parts (stainless steel on request)

Scotch yoke mechanism available in both canted or symmetric executions

Chromium plated guide bar to absorb transversal forces

Bushings are made of PTFE-filled steel bronze (other materials on application)

Electroless nickel or chromium plated cylinder to minimize friction and prevent corrosion.

Spring cartridge incorporates up to three springs, depending on the model.

Power module safety design allows to replace the cylinder seals without any danger

Multiple certified lifting lugs ideally located in function of center of gravity for balanced lifting

ISO 5211 flange connection

Position indicator provided with VDI/VDE 3845 NAMUR drive slot

systems available for any product line, designed and manufactured to fully comply with the most demanding customers’ specifications. Thanks to its sixty-year of engineering and manufacturing experience, STI has thousands of actuators installed in plants all over the world.

Compact Designed to provide high torque with minimum space and weight. Symmetric or canted scotch-yoke for ideal torque distribution. Spring package, if present, is installed inside the cylinder.

Safe Available in double-acting and spring return. Several spring packages are available to provide required spring rates. Maximum safety is ensured by design of spring packs being spring compression is independent from removal of cylinder cap and tie rods.

Page 4: Brochure RTC

4 - RT series

Compact quarter turn actuators

■ Full stainless steel version available on request

13

1524

2114

1822

19

20

16

23

11

9

17

Page 5: Brochure RTC

RT series - 5

Operating pressure: Up to 12 Barg

Standard supply medium: air, nitrogen or sweet gas (special version for sour gas on request)

Standard operating temperature: -30°C to 100°C (high/low temperature design available on request)

Output torque: from 40 Nm up to 6.000 Nm for double acting version

Spring Ending Torque: from 40 Nm up to 2.500 Nm for single acting version

Certifications/approvals:

PED 97/23/EC

ATEX 94/9/EC

MACHINERY DIRECTIVE 2006/42/EC

IP66/67M according to IEC/EN 60529

Up to SIL3 requirements (IEC 61508) as a “single device”

Designed and tested in accordance with EN 15714-3

Further certifications are available please contact STI for updated list.

RTC output torque values and dimensions/weights are available in our web site: www.stiactuation.com

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1. Housing Carbon steel 2. Yoke bushing Steel/bronze/PTFE 3. Scotch yoke Alloy steel 4. Guiding block Carbon steel 5. Sliding block Bronze 6. Guide bar Alloy steel 7. Cover Carbon steel 8. Stop screw Stainless steel 9. Tie rod Alloy steel 10. Head flange Carbon steel 11. End flange Carbon steel 12. Piston rod Alloy steel 13. O-ring NBR 14. Piston Carbon steel 15. O-ring NBR 16. Nut Alloy steel 17. O-ring NBR 18. Cylinder tube Carbon steel 19. Piston rod bushing Steel/bronze/PTFE20. O-ring NBR 21. Spring Spring steel 22. Spacer tube Carbon steel 23. Stopper protection Stainless steel 24. O-ring NBR

description material

12

10

64 5

1

8

3 27

Page 6: Brochure RTC

6 - RT series

Optional featuresManual Override• Anintegralordeclutchablemanualhandwheelisavailableasoption

for RTC series. A single hand wheel is supplied for spring return units; double acting unit will be supplied with an hand wheel at each end for manual operation in either direction.

• Locking device to avoid unauthorized actuator operations is available.• Hydraulicoverrideisavailableasoption.

Control System & accessoriesControl systemSTI designs and produces a wide range of accessories and control systems to ensure superior performances and satisfy the most demanding requirements in modulating, on/off and heavy duty service.Control systems panels/cabinets can be installed on the actuators or supplied loose for remote mounting i.e. for easy access and limit exposure to excess heat and vibrations.

Compact quarter turn actuators

Page 7: Brochure RTC

RT series - 7

aC

CE

SS

OR

IES fasTrak

High performances smart, 2 wires, positioner

High flow rate (Cv=2) Hart protocol Integrated position transmitter Exia and Exd version Remote mounting option Fail freeze option ( 2 wires) DD files for 375/475 and AMS

available

DigitalTrakSmart 2 wires positioner

Display & push button Fail freeze option Integrated position transmitter

advanced Diagnostic Partial stroke

test & dynamic error Step response Stability control Soft approach to seat Signal generator for frequency

analysis (dynamic tests)

Valsafe SILSafety Valve

Partial stroke tests without interruption in plant operation

Miscellaneous AL Lock-up device AV ¼” and ¾” Volume Booster CO 3 way pneumatic valves GR Manual override MC Motion Converter SL Silencer SR Quick discharge valve TP Pressostatic switch TR Position transmitter UD Quick Exhaust BV Big Volume Booster BW Ultra High capacity booster

Page 8: Brochure RTC

Brescia

Bergamo

Verona✈Milano/

Orio al SerioAirport

MilanMalpensaAirport

LinateAirport

Piacenza

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w w w . s t i a c t u a t i o n . c o m

STI S.r.l. (Quarter Turn Division)Via Grilli 229010 San Nicolò a TrebbiaRottofreno (PC) ItalyTel. +39 035 2928.2Fax +39 0523 [email protected]

www.stiactuation.com

STI S.r.l. (Headquarter)Via Pascoli 10 a/b24020 Gorle (BG) ItalyTel. +39 035 2928.2Fax +39 035 [email protected]