Ali & Sons Oilfields Supplies & Services Division Ali & Sons Oilfields Supplies & Services Division

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Ali & Sons Oilfields Supplies & Services Division
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  • Ali & Sons Oilfields Supplies & Services Division
  • About us
    • Who We Are
    • What we do?
    • Vision & Mission
    • Our Goals
    • Management
    • Organizational Chart
    • Our Commitment to Safety
    • Our History
  • Our Divisions
    • Mechanical
    • Instrumentation & Control
    • Chemical & Process
    • Drilling & Workover
  • Sustainability
    • Sustainability
    • Complaint Form
    • Code of Conduct
    • Code of Ethics
    • Anti Corruption Policy
    • QHSE Policy
    • Corporate Social Responsibility Policy
  • Media
    • Photo Gallery
    • Newsletter
    • Brochure
    • News
  • More
    • Our Partners
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Media

News

ESD (Emergency Shutdown) and partial stroke testing

Posted by ASOS on October 1st, 2015

17-inside

In many process plants, a shut-off valve in a safety loop is usually equipped with a solenoid valve for emergency shutdown and with limit switches for position feedback. The mere shutoff valves remain unused in one position during normal operation over a period of many months or years even.

A special test procedure was developed, which allows partial stroking of the valves without causing any drastic interruptions in the production process. The valve is only partially stroked to test it, which does not perceptibly impair plant operation. This allows the plant operator to verify whether the valve will shut down in the event of emergency.

The SAMSON Type 3730-3 Electropneumatic Positioner, which has also been enhanced to include an ESD function, has been designed to perform partial stroke tests on the valve. The combination of certified components and positioner functions meets all the necessary safety requirements.

The positioner can be mounted on the valve in addition to the solenoid valve or to replace it. It allows the valve to be moved precisely to follow the set point within the valve’s working range. The partial stroke test completely integrated into the positioner detects a sticking valve caused, for example, by corrosion. Test schedules are made flexible and can be prolonged, if necessary. The required test validation can be performed simply by using the corresponding instrumentation and initiating it over a commonly available SIS logic solver.

News Archives

  • 5th October 2017

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    Shamis Bin Ali Al Dhaheri...
  • 18th October 2015

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  • 7th October 2015

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  • 1st October 2015

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Media

News

ESD (Emergency Shutdown) and partial stroke testing

Posted by ASOS on October 1st, 2015

17-inside

In many process plants, a shut-off valve in a safety loop is usually equipped with a solenoid valve for emergency shutdown and with limit switches for position feedback. The mere shutoff valves remain unused in one position during normal operation over a period of many months or years even.

A special test procedure was developed, which allows partial stroking of the valves without causing any drastic interruptions in the production process. The valve is only partially stroked to test it, which does not perceptibly impair plant operation. This allows the plant operator to verify whether the valve will shut down in the event of emergency.

The SAMSON Type 3730-3 Electropneumatic Positioner, which has also been enhanced to include an ESD function, has been designed to perform partial stroke tests on the valve. The combination of certified components and positioner functions meets all the necessary safety requirements.

The positioner can be mounted on the valve in addition to the solenoid valve or to replace it. It allows the valve to be moved precisely to follow the set point within the valve’s working range. The partial stroke test completely integrated into the positioner detects a sticking valve caused, for example, by corrosion. Test schedules are made flexible and can be prolonged, if necessary. The required test validation can be performed simply by using the corresponding instrumentation and initiating it over a commonly available SIS logic solver.

News Archives

  • 5th October 2017

    Ali & Sons Oil Field...
  • 9th November 2015

    Shamis Bin Ali Al Dhaheri...
  • 18th October 2015

    ASOS presents paper on Sour...
  • 7th October 2015

    Ali & Sons Oilfield...
  • 1st October 2015

    ESD (Emergency Shutdown) and...
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