​​​​​​​​​​​​​​Since January 2016 the Newman Hattersley products have been manufactured by IMI Bopp & Reuther using the original Hattersley Newman Hender and Newman Hattersley Ltd. drawings.  IMI Bopp & Reuther has been a global supplier of valves into the Nuclear Power Market for over 50 years.  They have implemented and maintained nuclear certifications including CSA N285.0; ASME V, N, NV, UV and NPT; CSA Z299; ISCIR; KTA; SCC.​

​IMI Newman Hattersley has over 60 years' experience working with nuclear plants around the world. We have developed proven, advanced valve technologies to meet the demanding performance and safety requirements of next-generation nuclear power reactors. Based in Canada, IMI NH supplies a range of products for CANDU nuclear reactors around the world.​

Critical applications

  • Nuclear
    IMI NH valves can be found on applications on the nuclear side of PHWR, PWR, GCR and BWR nuclear reactor designs, where isolation of potentially lethal media is essential. Our valves are successfully working in Emergency Cooling Water systems, Primary Heat Transfer systems and Fuelling machines. The high performance valves have a robust design, with a service life of 40 years or more. As most applications are inside containment, they are manufactured in accordance with the ASME III Nuclear Code.

Key technologies

  • Bellows Sealed Globe Valves
    The Bellows Sealed Globe Valves provide a true hermetic valve through the use of a bellows internally and seal welds on all eternal joints. This prevents any harmful chemicals from being released into the atmosphere. The bellows themselves are multi-ply, welded seam construction from Inconel 625 material, for long life. Flexible metallic bellows replace the function of the conventional gland, reducing maintenance and operating costs. By welding the metallic bellows to the stem and bonnet, we ensure zero leakage through the gland, preventing the release of harmful chemicals. 

  • 3 Piece Ball Valve
    The 3-piece design means any part of the valve can be maintained without being removed completely from the line. The valve has a highly polished ball to provide tight shut off, the floating ball design preloads the valve seat, and the line pressure provides the force needed to create a bubble tight shut-off at all pressures. 

  • Butterfly valve
    The double offset design provides low operating torque, requiring a smaller actuator, which can be manual, pneumatic or electric. The robust design ensures consistent operation and reduced maintenance, while the wafer style design reduces weight in the pipeline.

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22 December 2016
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NEW IMI Eye – fourth edition
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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

Fast Facts



Joined IMI:




Installed base:

19,000+ valves / 1,300+ other products




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