We are a leading provider of specialised valves for the oil, gas, chemical and petrochemical industries. Customers use our valves in the most severe service applications, where safety integrity and performance are critical. Our engineers have the skills and experience to advise on complex flow control issues.​​

Critical applications

  • Petrochemical
    Our valves are widely used in extreme temperature, pressure, corrosion and erosion petrochemical processes, including PTA, ethylene, oxides, salts, fatty acids, polypropylene and chlorine. Thanks to our unique springless design, PTA licensors have specified IMI Truflo Rona valves for their most severe applications. 

  • Oil & gas
    Our valves are used in on- and off-shore applications where critical isolation and control of hydrocarbons is necessary. High reliability and robustness makes our valves the product of choice for applications such as HIPPS, ESD, BDV, Riser and SSIV.

  • LNG carriers & terminals
    LNG (liquefied natural gas) and LPG (liquid propane gas) ships and terminals use our valves worldwide - over a third of the operating LNG fleet is equipped with IMI Truflo Rona valves. Our valves are engineered for continuous service and ease of maintenance. We offer full automated and control valves for ship-to-shore discharge and loading, with minimal manning and reliable operation at -164°C. 

  • High temperatures and erosive applications
    Applications at very high temperature (up to 850°) or processes handling slurries or abrasive powders, can be managed safely and efficiently thanks to the high-performance, metal-to-metal technology we employ in our range of ball, gate, globe and check valves.

  • Oxygen services
    Our oxygen valves, engineered to the highest safety specifications, are used by major producers of industrial gases worldwide.

Key technologies

  • Ball Valves Trunnion mounted wedge seats design
    Our exclusive wedge seat design means our top entry trunnion mounted ball valves have self-adjusting seats, providing leak tight closure under all operating conditions and valve orientations. Our unique springless ball valve compensates automatically for changes caused by pressure, temperature and wear and is particularly well suited to applications where seat pockets are weak points, and slurries or trapped debris could require premature maintenance. The valves are designed to allow fast, easy, in-line service for safe and rapid maintenance. 

  • C Ball Valves Trunnion mounted double eccentric: C-Rex
    Our C-Rex top entry segment ball valves are based on our proprietary double eccentric design. C-Rex non-rubbing, torque-seated valves offer mechanical sealing, guaranteeing superior performance in extreme applications. The unique and renewable seat is easy to remove for maintenance, making these valves ideal for applications that combine high frequency operation with the presence of solids that would otherwise lead to a premature wearing of the sealing elements. ​​​​

Latest News

Half a century for Keith at IMI Truflo Marine
06 October 2020
IMI Critical Engineering digital FAT delivers customer projects on time
07 September 2020
Another big aftermarket win in LATAM for IMI Critical Engineering
18 August 2020
Important Update – COVID-19
18 March 2020
Valve Doctor programme celebrates 20th anniversary
16 September 2019
Unconventional support for the unconventional oil and gas industry
01 July 2019
17 June 2019
IMI CCI showcases choke valve at DUG Rockies conference
04 June 2019
Jackie Hu appointed Divisional Managing Director of IMI Critical Engineering
07 March 2019
Roy Twite to succeed Mark Selway as Chief Executive of IMI plc
05 March 2019
IMI Critical holds Safety Summit
21 September 2018
New HSE handbook to help keep field service engineers safe
10 August 2018
Safety first at IMI Critical
31 July 2018
IMI InterAtiva’s Series RK Valves certified ‘fire-safe’
24 July 2018
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

Quality Policy ​

Fast facts



Joined IMI:




Installed base:



ISO 9001:2008 Accreditation, since 1993
Fire Safe Test Certification API 607, ISO 10497, API 6FA
Fugitive Emission Certification: TA-LUFT, Section, EPA Method 21, since 1999
Fugitive Emission Certification: ISO 15848
PED 97/23/EC Accreditation, since 2000
ATEX Q4/9/EC Certification, since 2005
SIL 3 IEC 61508 Certification, since 2006
TSG Certificate (China), since 2008
ABSA Certificate (Canada), since 2008
API 6D, since 2010
Third Party Type Approval : DNV, Lloyds, ABS, BV​


Belgium, Italy, US, China​



​Global sales:​
T: +32 (0) 240 6886​​​​

E: imirona.sales@imi-critical.com​


Our locations​​​​​



Quality Policy Document

​​​IMI Truflo Rona Quality Policy.pdf
IMI Truflo Rona