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Stahl-Armaturen PERSTA GmbH
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  5. PERSTA - High-Pressure Stop Check Valve ...

PERSTA - High-Pressure Stop Check Valve for Flow Control and Backflow Prevention

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The high-pressure stop check valve from PERSTA integrates the dual functions of a shut-off gate valve and a swing check valve in a compact design. Unlike traditional valves that suffer pressure loss when changing the medium's flow direction, this valve mitigates such losses, ensuring optimized pressure management. The innovative gate valve architecture uses one disc in the open position to also act as a swing check valve, closing swiftly to prevent backflow in conditions of pressure loss or reverse flow. The valve is constructed from high tensile strength forged steel, leading to superior durability and reduced weight, which lowers structural costs and contributes to enhanced plant efficiency. Tested over extended periods at the Marchwood CCGT Power Station, this valve demonstrated increased energy production and profitability. The valve is compatible with various media forms, tolerates temperatures up to 650°C, and can withstand pressures up to PN 630. It's available in sizes up to DN 450, accommodating diverse industrial requirements.
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The high-pressure stop check valve is the latest innovation from PERSTA. It combines the functions of shut-off gate valves and swing check valves in a single valve, without having to compromise on handling, wear, functionality or pressure loss. Combination solutions already exist on the market which ensure isolation and prevent backflow. However, their architecture is that of a traditional valve and changing the flow direction of the medium results in a significant drop in pressure. But this is not the case with our stop check valve!

Our stop check valve works like a conventional gate valve, with one of the two discs in the open position acting as a swing check valve. If the pressure decreases or the medium flows back, the stop check valve closes and any backflow is immediately prevented. In addition to its special design and functionality, the stop check valve can boast the usual level of PERSTA quality. Our use of forged steel and the accompanying higher tensile strength help to achieve above-average durability and lower overall weight. This reduces structural costs within the plant.

Before our in-house development was launched on the market, it had previously been subjected to a long-term maturity test at the Marchwood CCGT Power Station in the UK. Ultimately, energy production was increased by 0.8 megawatts based on 6000 operating hours a year. This represents an increase in profits of some EUR 230,000.

Media

Water, steam, oil, gas and other non-aggressive media.

Pressure

PN 630

Nominal size

bis DN 450

Temperature

Up to +650°C

Materials
  • 1.0460 / A105
  • 1.54151.7335 / A182 F12
  • 1.7383 / A182 F22
  • 1.63681.4903 / A182 F91
  • 1.4901 / A182 F92

Other materials upon request.