Pentair Valves & Controls has launched the new Anderson Greenwood 5200 pilot-operated pressure relief valve to offer overpressure protection for challenging economizer applications in heat recovery steam generators (HRSGs). The 5200 is specifically designed to withstand the high temperatures and pressures in HRSGs in combined cycle power plants, while meeting the stringent ASME section 1 code requirements for both steam and water.
The latest pressure relief valve from the Anderson Greenwood portfolio provides stable performance levels in steam and hot or flashing water, offering plant operators effective boiler protection in overpressure situations. As a modulating pilot-operated valve, the 5200 will only open in proportion to the overpressure, eliminating valve chatter when exposed to water or water flashing into steam. At the same time the new valve boasts a full nozzle design and metal main valve seat, allowing it to withstand higher temperatures up to 538°C. As a result, the valve achieves maximum tightness during the critical start-up processes and after relief cycles, allowing the system to operate closer to set pressure without valve leakage. This not only reduces maintenance frequency and costly shutdowns, but also increases production capacity, allowing operators to increase overall system output. The 5200 can easily be installed to replace existing spring loaded valves and only requires a single adjustment for set pressure changes.
“The 5200 was designed specifically for HRSG boiler economizer applications and meets the severe service demands of both steam and water…,” said Cliff Marsh, Global Product Manager.