HIGH-PRESSURE FORGED GATE VALVES S43 WORK AS A SHUT-OFF ELEMENT IN THE PIPING SYSTEM OF U.S. STEEL KOŠICE, SLOVAKIA’S LARGEST STEEL PLANT

For the largest Slovak steel manufacturing and processing company U.S. Steel Košice, we have repeatedly produced high-pressure forged gate valves with external by-pass designation S43. The High-Pressure Forged Gate Valves S43 were installed in a piping system where they work as a shut-off element between the boilers K6 and K? and turbines, the medium is steam, at an operating temperature of up to 540 °C and a pressure of up to 10 bar. Both boilers are now fully operational.

We started manufacturing High-Pressure Forged Gate Valves S43 in 2012 in response to the latest trends in the energy industry and today they are installed in a number of conventional power plants and industrial facilities in various countries such as Germany, Kazakhstan, Latvia, the Czech Republic and Slovakia. lt is not unusual for us to deal with special customer design requirements and we routinely make design modifications to our existing products according to customer requirements.

IMPLEMENTATION OF ARAKO

For this order, were manufactured 4 pieces of Forged Gate Valves S43 with external by-pass of DN 350/275 and DN 300/250 for PN 250 with weld ends. The gate valve body was forged from material 1. 7715, into which a flexible wedge is inserted via a self-sealing bonnet.

The sealing surfaces of the seat rings, which are pressed into the body and secured by welding, as well as the sealing surfaces of the wedge, were coated with Stellite 6. The sealing of the bonnet and gasket was solved by means of special graphite seals. The protection of the pressure increase in the intermediate space of the body was solved by making an external double by-pass DN 25 with connection to the central part (space above the wedge).

For external by-passes, were used two High-Pressure Shut-Off Globe Valves V46.2 ON25 PN 250 made of material 1.7715 and operated by handwheels. Both forged gate valves were operated by a combination of electric actuator ZPA Pečky + gearbox AUMA GK35.2.

During the entire production process, the Forged Gate Valves S43 were subjected to all mandatory checks according to European standards. The specific requirements of this order were managed and the forged gate valves were dispatched to the customer’s full satisfaction through the mutual cooperation of design, technology and of course our manufacture.

OTHER PRODUCTS USED?

ln this project, High-Pressure Shut-off Globe Valves V46.2/40.2 DN 25 PN 250 and High- Pressure Lift Check Valves Z15.2 DN 25 PN 250 were also delivered from our product portfolio.

ARE YOU INTERESTED IN MORE INFORMATION?

lf you are interested in the information in our reference, have questions or are interested in clarification, or if you have a similar project and need advice, contact ARAKO Sales Manager: Kamila Bučková      kamila.buckova@arako.cz