Tyco Flow Control Introduces New Pilot Operated Pressure Relief Valve

Tyco Flow Control, a unit of Tyco International, today announced the launch of its newest pilot operated pressure relief valve, the Anderson Greenwood 5200.  The 5200 is designed to withstand the high temperatures and pressures that are prevalent in heat recovery steam generators in combined cycle power plants, while meeting the stringent code requirements of the American Society of Mechanical Engineers (ASME).

Tyco Flow Control’s engineers designed a valve that could meet increasing temperatures and pressures and give plant owners the security of premium seat tightness close to set point.  The 5200 boasts a metal main valve seat, as opposed to the resilient seat commonly used in pilot operated pressure relief valves.  The metal seat allows the valves to withstand higher temperatures – up to 1000⁰ F.

In addition, the 5200 is a modulating pilot operated valve, rather than a spring-loaded or snap-acting pilot valve.  This unique feature enables the valve to open in proportion to the specific overpressure needed while providing maximum tightness during the critical start-up processes and allows the valve to operate closer to set pressure without leakage.

“The 5200 is a unique safety valve that provides our power customers with the reassurance they need to meet code requirements and higher temperatures, while having a reliable product that reduces the chance of leakage during critical applications,”
said Cliff Marsh, Global Product Manager, Pilot Operated Pressure Relief Valves.
“This is another extension of our broad portfolio of customisable valves and controls products that customers rely on to meet the most critical safety needs in the power industry.”

Tyco Flow Control developed this pressure relief valve to serve specifically as a safety valve in economiser applications in gas-fired power plants.  An economiser uses waste heat to pre-heat boiler feedwater prior entry to the steam drum in gas-fired plants.

In the process, flashing water often reaches extremely high pressure and temperature, and code requires that all parts must meet the stringent pressure relief requirements of ASME Section I.  With its metal seat, the 5200 meets ASME Section I certifications for capacities in both steam and water.

The 5200 is the next model of Anderson Greenwood Series 5100 pressure relief valves, which was introduced in 2008 and was the first non-flowing, modulating pilot operated pressure relief valve that became certified under ASME Section I.

The 5200 increases the temperature capability of Tyco’s ASME Section I pilot pressure relief valve offering. It will be available to order beginning in September 2012.