Product - DS Series

​​​​​​​​​​​​​​​Concentric Rubber Lined Valves

Our DS Series valves are specified worldwide for their unique sealing performance delivered by their robust rubber seat design and high quality construction materials. They are manufactured using stable and durable components to ensures long-term reliability. 

Key features

  • Fully rated up to 20 bar

  • Replaceable rubber liner 

  • Complete double seal protects stem from media 

  • Self-centering disc (up to 24")  

  • No pins or keys to connect disc (up to 24")

  • Self-lubricating and resistant alloy bushings

  • Wide range of materials available


The DS Series design is based upon the centered shaft concept to allow easy installation and maintenance. These features make the DS Series ideally suitable for small and large size valves where the cost of ownership needs to be kept to a minimum.​

    • Heavy duty service 

    • Easy installation and maintenance

    • One-piece cast or fabricated design

      • Rigid and heavy construction

      • Leak free performance

    • Up to 60” replaceable rubber seat

      • Critical components completely sealed from the media

      • Unsurpassed stability and durability

      • Zero chance of detachment, tearing or other inherent 'soft boot' seat failure

    • From 64” up to 80” vulcanized seat on the body

    • Hydro-dynamically efficient disc profile

      • Improves flow capability

      • Reduces pressure drop and dynamic torque

    • Customized specifications

    Typical applications

                              • Utilities

                              • Air

                              • Water 

                              • Fire fighting

                              • Sea water

                              • Slurry brine

                              • Hydrocarbons

                              • Sewer

                              • Geothermal water

                              • Demineralization of water

                              Product specification and dimensions

                              Ductile iron
                              Carbon steel
                              Stainless steel
                              Aluminium bronze
                              High alloy titanium

                              Production range
                              Nominal diameter 1-1/2" up to 80"

                              Temperature limits
                              From -20°C (-4°F) up to +150°C (+302°F)

                              Pressure limits
                              From full vacuum up to +20 bar (285 psi) fully rated

                              Applicable standards
                              Design: ANSI B16.34 / BS5155
                              Face to face: API 609/ ISO 5752 short
                              Flange: ANSI/ ISO/ DIN/ UNI
                              Testing: API 598

                              NP 6-10 – 16
                              ANSI CI.150​

                              Disc and shaft connection up to ND 24" 

                              Disc and shaft connection over ND 24"

                              IMI Orton engineered solutions draw on the technological and financial backing of IMI plc which operates in over 50 countries.

                              Latest News

                              Important Update – COVID-19
                              18 March 2020
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                              16 September 2019
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                              01 July 2019
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                              Jackie Hu appointed Divisional Managing Director of IMI Critical Engineering
                              07 March 2019
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                              05 March 2019
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                              21 September 2018
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                              10 August 2018
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                              21 April 2017
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                              22 December 2016
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                              29 October 2015
                              IMI CCI SriCity wins regional safety award
                              27 October 2015
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                              23 October 2015
                              IMI companies ‘act as one’ to deliver for customer
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                              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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                              Product - DS Series