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​​​​​​​​​​​​​​​​​​​​​​​​IMI STI is an international leader in valve actuation. We design and manufacture complete actuation systems, which can be fully customised to meet customer needs, to operate industrial valves for the most demanding applications and processes. We offer a diverse range of valve actuation products including linear and quarter turn actuators, smart and traditional positioners, and a full range of accessories. ​

Critical applications​

  • Power
    Our fast-stroking, highly-reliable actuators have been recognised for providing superior performance in severe service applications for over 50 years. Key applications include turbine bypass systems, steam damper heating, boiler level control (including nuclear); pump recirculation; emergency shut down, line isolation, and dampers for fans. 

  • Oil & gas
    In the oil & gas industries we provide compressor anti-surge (especially hot gas bypass), choke valves, gas to flare and dampers for fans. 

  • LNG
    Over 90% of compressor anti-surge valves in LNG plants worldwide are fitted with IMI STI actuation control systems, maintaining plant up-time and operational efficiency. 

Key technologies

  • Linear actuator (SC series)
    Our pneumatic valve piston actuators and damper actuators are purpose designed and manufactured for the operation of flow control devices such as dampers, louvers, butterfly and ball valves. They are ideal applications for power plants, refineries, pipe steel works and on board vessels.

  • Quarter turn actuator (RT series)
    Our RT Series offers a complete range of pneumatic and hydraulic quarter turn actuators suitable for all on-shore and off-shore applications, covering the general on-off valve and modulating control valve duties.

  • Control drive actuator (CM series)
    This pneumatic actuator system guarantees continuous operation in harsh environments; it is used in power stations, steel industries, petrochemical plants, desert areas, among others.

  • Positioners (PT series)
    We offer a wide range of positioners: pneumatic or electro-pneumatic, smart (very high flow rate) or 'traditional type'.

  • Accessories (AC series)
    A full range of accessories and control systems is available.

Aftermarket services

Fast delivery, with 24 hour spare parts shipment service, on site Field Service for spare parts installation and upgrade and regular maintenance of our actuator and accessories. Our spare parts service guarantees original equipment parts are interchangeable with existing ones. We provide training on site for better calibration and knowledge of our system and upgrade service. ​​

IMI STI - Model 231 requirements

In order to render the organization, management and corporate control system compliant with the Legislative Decree, June 8, 2001, n. 231, the company adopted by resolution of the Board of Directors on 19 July 2013, the organization and management model required by Legislative Decree, June 8, 2001, n. 231 (hereafter, the "Model 231") and appointed a Supervisory Board with the task of monitoring the proper implementation of the Model 231.
The Model 231 has been updated over time (lastly, on October 31, 2014) and integrated to reflect the subsequent adoption of legislation, which has expanded the category of crimes covered under the umbrella of the administrative responsibility pursuant to Legislative Decree, June 8, 2001 n. 231.
The contents of the Model 231 are consistent with the provisions contained in the guidelines adopted by industry associations and the Model 231 represents a further step towards strictness, transparency and sense of responsibility in internal relations and relations with the outside world, while offering shareholders the best guarantees of efficiency and compliance to the law.
The chairman of the Supervisory Board is Mr. Ermelindo Lungaro.
Any violation to the regulations and to the compliance of the Model 231 must be reported to the Supervisory Board.
Reports may be submitted in the following manner:
Writing to:
STI S.r.l.
Supervisory Board
Att. Mr Ermelindo Lungaro
Via dei Caravaggi, 15
24040 - Levate, Bergamo (Italy)
 
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Data Privacy

STI S.r.l. (IMI STI) is aware of the importance covered by the Protection of Personal Data and undertakes to  respect  the  rules  of  conduct  set  up  by  the  Legislative  Decree,  30  June  2003,  n.  196  (Code regarding the Protection of Personal Data), which are to guarantee navigation in a secure network, through Personal Data Protection.  
Attached please find the Privacy Disclaimer under Article 13 of the Italian Legislative Decree, 30 June 2003, n. 196. 
 
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IMI STI - Modello 231

Al fine di adeguare il sistema di organizzazione, gestione e controllo societario al decreto legislativo n. 231/2001, la società ha adottato con delibera del Consiglio di amministrazione in data 19 luglio 2013 il Modello di organizzazione e di gestione previsto dal Decreto Legislativo, 8 giugno 2001, n. 231 (di seguito, “Modello 231”) e ha nominato un organismo di vigilanza con il compito di verificare la corretta osservanza del Modello 231.
Detto Modello 231 è stato nel corso del tempo aggiornato (da ultimo, il 31 ottobre 2014) ed integrato in relazione agli interventi legislativi succedutisi negli anni, che hanno ampliato la categoria dei reati presupposto della responsabilità amministrativa ex Decreto legislativo, 8 giugno 2001 n. 231.
Lo stesso è coerente nei contenuti con quanto disposto dalle linee guida elaborate in materia da associazioni di categoria e rappresenta un ulteriore passo verso il rigore, la trasparenza e il senso di responsabilità nei rapporti interni e con il mondo esterno, offrendo al contempo agli azionisti le migliori garanzie di una gestione efficiente e corretta.
Il presidente dell’organismo di vigilanza è il signor Ermelindo Lungaro.
Ogni violazione delle norme del Modello 231 deve essere riferito all’organismo di vigilanza.
Le segnalazioni possono essere presentate nel modo seguente:
Scrivendo a:
STI S.r.l.
Organismo di vigilanza
Att. Sig. Ermelindo Lungaro
Via dei Caravaggi, 15
24040 - Levate, Bergamo

Protezione dei dati personali

STI S.r.l. (IMI STI) è consapevole dell’importanza della tutela dei dati personali e si impegna a rispettare le regole di condotta sancite dal decreto legislativo, 30 giugno 2003, n. 196 (Codice in materia di protezione dei dati personali) dirette a garantire una navigazione in rete sicura attraverso la tutela dei dati personali.
In allegato l’ Informativa Privacy ai sensi dell’art. 13 del decreto legislativo, 30 giugno 2003, n. 196.


IMI in Action

IMI CCI participates at regional VPP Safety Summit
08 June 2018
Largest Romanian customer recommends IMI Remosa
10 May 2018
Lean success in IMI Critical back office functions
04 May 2018
Isolation valves adapted for Fluidised Catalytic Cracking applications
30 April 2018
IMI Critical Korea closes in on world-class LEAN performance
27 April 2018
IMI board tours IMI Critical businesses
25 April 2018
New positioner software tools from IMI STI
08 February 2018
Launch of Zero Backlash Scotch Yoke Mechanism
16 January 2018
IMI Critical Korea certified to sell actuators in Europe
20 September 2017
IMI Critical named ‘supplier of the year’ by Korea’s Doosan
19 September 2017
100th Valve Doctor graduates from IMI Critical
13 September 2017
Top HSE certification for IMI Critical’s California site
12 September 2017
Launch of High Endurance Actuator
21 April 2017
Launch of AB6350 valve
06 April 2017
Launch of 100DPC Multi-trim
17 March 2017
Launch of 840GS control valve
22 December 2016
IMI Critical to exhibit new technology at ADIPEC 2016
25 October 2016
New graduates join IMI Critical in four countries
22 September 2016
IMI Critical to take stand at ONS 2016 in Norway
16 August 2016
IMI Critical opens new China plant in Qingpu
27 July 2016
IMI CCI Korea celebrates 2,000 days of no “Lost Time Accident”
25 July 2016
Visit to IMI Z&J Germany by the Russian Economic Bureau from Bonn
11 July 2016
IMI Z&J Düren moves into modern offices
08 July 2016
IMI Critical Engineering forms strategic partnership with MRC Solberg & Andersen
05 April 2016
IMI Way Day 2016 date announced
01 March 2016
NEW IMI Eye – fourth edition
26 February 2016
IMI Critical co-locates China businesses
20 January 2016
IMI CCI Switzerland gains certification for new generation safety valves
18 December 2015
IMI Critical rise to Dragon challenge
30 November 2015
IMI STI achieves CRCC approval for new products
24 November 2015
IMI Truflo Marine Attend the Engineering Technology and Innovation Exhibition 2015
23 November 2015
IMI CCI Sweden secures new contracts on three continents
23 November 2015
IMI Critical Engineering appoints new petrochemicals head
05 November 2015
IMI CCI Czech Republic gains ‘Safe Enterprise’ certification
03 November 2015
IMI Critical announces 90mRMB investment in China
29 October 2015
IMI CCI SriCity wins regional safety award
27 October 2015
Key clients attend grand opening of new Aberdeen facility
23 October 2015
IMI companies ‘act as one’ to deliver for customer
02 October 2015
IMI CCI Sri City approved by NTPC
01 October 2015
IMI Critical Engineering showcases innovation at Valve World Expo Asia
28 September 2015
Nexen awards IMI Orton
25 September 2015
IMI Critical Engineering celebrates opening of new Jubail repair centre
23 September 2015
IMI Critical and IMI Precision join forces at Valve World Expo + Conference Asia 2015
21 September 2015
IMI Critical Engineering opening of new Jubail Repair Centre
18 September 2015
IMI CCI India manufactures first 1050MW turbine bypass valve
20 May 2015
Largest ever contract for IMI Critical Engineering
18 February 2015
New Houston facility opens
12 February 2015
IMI Critical completes acquisition of Bopp + Reuther
02 January 2015
IMI Critical takes family of brands to Valve World 2014
11 December 2014
IMI STI doubles size of Italian plant
20 October 2014

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Fast facts

Founded:

1960

Joined IMI:

2002

Employees:

110

Installed base:

220,000+ actuators

Certifications:

ATEX; IECEX; ISO 9001; PED (Module H and H1)

Locations:

Italy​

IMI STI