Brochure RTC

Product catalog summary

Overview: The RTC Scotch Yoke Pneumatic Actuators are designed for operating quarter turn valves such as ball, butterfly, and plug valves. They are suitable for both on-off and modulating heavy-duty services. The actuators use a waterproof scotch yoke mechanism to convert linear pneumatic cylinder movement into rotary motion necessary for valve operation.

Key Features:

Available in double acting or spring return configurations with a compact design.
Weatherproof housing made from carbon steel, ensuring protection for all moving parts.
Scotch yoke mechanism available in canted or symmetrical executions.
Components include chromium plated guide bar, PTFE-filled steel bronze bushings, and electroless nickel plated cylinder.
ISO 5211 flange connection and VDI/VDE 3845 NAMUR drive slot for position indication.
Optional manual hand-wheel and full stainless steel version available.

Benefits:

Reliable: Rugged construction with carbon steel housing and high-strength alloy steel scotch-yoke.
Strong: Internally coated watertight housing for corrosion resistance and stainless steel travel stops for stroke adjustment.
Compact: High torque with minimal space and weight requirements.
Safe: Spring pack design allows safe spring compression without removing cylinder cap and tie rods.

Technical Specifications:

Operating pressure up to 12 Bar.
Standard supply medium includes air, nitrogen, or sweet gas.
Operating temperature ranges from -30°C to 100°C.
Output torque ranges from 40 Nm to 6,000 Nm for double acting versions.
Spring ending torque ranges from 40 Nm to 2,500 Nm for single acting versions.

Certifications: The actuators are certified under PED 97/23/EC, ATEX 94/9/EC, EAC TR TS 012/2011, MACHINERY DIRECTIVE 2006/42/EC, IP66/67M, and SIL3 (IEC 61508). They are designed and tested in accordance with EN 15714-3.

Product Breakdown: The document provides a detailed breakdown of materials used in various components such as housing, yoke bushing, scotch yoke, guiding block, sliding block, guide bar, and more, primarily using carbon steel, alloy steel, and bronze.

Contact Information: IMI STI's headquarters and Quarter Turn Division are located in Italy, with additional contact details for their UK office provided.

Catalog excerpts

Engineering GREAT Solutions Scotch Yoke Pneumatic Actuators

Open the catalog to page 1

RT STI / FasTrak Smart Positioner IMI Series RTC: Scotch Yoke Pneumatic Actuators The RTC single/double acting pneumatic low-pressure actuators, are suitable for the operation of quarter turn valves (ball valves, butterfly valves and plug valves) for on-off and modulating heavyduty service. The actuator is made up of a waterproof scotch yoke mechanism transforming the linear movement of the pneumatic cylinder (on closing or opening) into the rotary movement, which is necessary for valve operation. Key features > ouble acting or spring return D compact design > Electroless nickel plated cylinder...

Open the catalog to page 2

Technical specifications Operating pressure Up to 12 Bar Output torque From 40 Nm up to 6.000 Nm for double acting version Standard supply medium Air, nitrogen or sweet gas (special version for sour gas on request) Spring Ending Torque From 40 Nm up to 2.500 Nm for single acting version Standard operating temperature -30°C to 100°C (high/low temperature design available on request) Certifications / approvals PED 97/23/EC ATEX 94/9/EC EAC TR TS 012/2011 MACHINERY DIRECTIVE 2006/42/EC IP66/67M according to IEC/EN 60529 SIL3 (IEC 61508) as a “single device” Designed and tested in accordance with...

Open the catalog to page 3

IMI STI - Headquarters Via Dei Caravaggi 15 24040 Levate (BG) Italy Tel. +39 035 2928.2 Fax +39 035 2928.247 IMI STI - Quarter Turn Division Via San Francesco 18 29017 Fiorenzuola d’Arda (PC) Italy Tel. +39 035 2928.2 Fax +39 0523 1715.295 IMI Critical Engineering Lakeside, Solihull Parkway Birmingham Business Park Birmingham B37 7XZ United Kingdom Tel: +44 (0)121 717 3700 Fax: +44 (0)121 717 3701 www.imi-critical.com [email protected] Bergamo Malpensa Airport Milan Linate Airport Milano/ Orio al Serio Airport Information in this document is protected by copyright. All rights are...

Open the catalog to page 4

All IMI STI catalogs and technical brochures

Archived catalogs

231 guidelines_STI_30-9-2015
8 Pages