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February 18 2018 09:40
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7 Jun 2017

Product Focus - The XC Range

The Alco Valves Group Ltd is delighted to announce that its XC range of Double Block and Bleed Valves is now PR-2 qualified as per API-6A Appendix F to 1200 Cycles. 

Why PR-2 at 1200 cycles? 

The API 6A Appendix F PR-2 qualification ensures that the Alco XC range of Double Block and Bleed Valve is suitable for supercritical applications and provides confidence that the components within the valve can stand the most arduous conditions throughout its working life.  However, testing at 1200 cycles supersedes this international standard and demonstrates suitability for critical applications. 

What is API-6A Appendix F PR-2 qualification testing? 

API-6A is a specification for Wellhead and Christmas Tree Equipment.  Appendix F, PR-2 is a performance verification test of the valve and components within the valve. The PR-2 test under Appendix F ensures that the components within the valve are suitable for high and low temperatures whilst dynamically cycling under various pressure conditions to ensure the integrity of the seals and the mechanical components. 

The Alco XC DBB valve 

The XC DBB valve was tested to API 6A Appendix F PR-2 over 1200 cycles at full differential from open to close using water for the hydrostatic test. In addition, the valve was cycled over 20 times from open to close at plus 121⁰ C and 20 times from open to close at -29⁰ C in accordance with temperature classification P and U of the API-6A standard. The high and low-temperature cycle test was completed using nitrogen to ensure the integrity of the seals and mechanical components. All cycle testing was achieved at class 2500lbs (6,250 psi).  

The XC DBB valve although based on an ASME design and test standard is capable of passing a super stringent API test at 1200 cycles, which ensures a reliable long term product for your applications. If you wish to work safe, protect the environment and increase efficiency specify the Alco XC DBB.  

The Alco XC range of DBB valve is a quality engineered product designed and manufactured in the UK under ISO 9001 using the latest machine technology.  If you require further information regarding the XC range of qualifications please contact your nearest sales office.


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