Chemical Technology June 2015

Stafsjö expands range with the new high pressure slurry valves

The SLH and SLX have epoxy-coated fully lugged valve bodies in nodular iron with integrated purge ports. The reinforced seats are flexible in an axial way and seals towards each other in the bore when the valve is in the open position, thus protecting internal parts and the gate from the abrasive high pressure media. Upon closure, the seats are displaced axially, forming a seal with the gate until it forms a complete closure of the bore and gives a bi-directional tight shut-off. The seats also form a sealing face on the valve flanges saving the need for gaskets. The gate is supplied in high strength stain- less steel, coated to give a hard and high wear and corrosion resistance surface. For security reason the valves are always sup- plied ready to be locked in either opened or closed position. The gland box, with three layers of TwinPack TM and a box bottom scraper, gives the gate guidance during operation and makes sure that a first-rate sealing is preserved. Both SLH and SLX have solid top works to give excellent stability during operation. In the standard collection of actuators and ac- cessories there are several types to choose

from and regardless of what was originally supplied with the valve, any exchange of actuator and/or accessories can easily be performed on site. For more information contact Fred Venter, on tel: +27 11 397 2833, email: fred.venter@ valve.co.za, or go to www.valve.co.za.

Stafsjö continues to focus on engineering and manufacturing of high pressure valves and introduces the SLH and SLX for really demanding applications with slurry and other abrasive media. Since the introduction of Stafsjö’s first slurry valve, the SLV, in 2009, applications requiring extreme performance require- ments at really high pressures have become common. In order to win large slurry proj- ects, Stafsjö realized that it needed to have high pressure slurry valves in its product range. Now that it has them available, Maria Persson, Sales and Marketing Director at Stafsjö says she is looking forward to bid- ding on upcoming projects. Stafsjö’s SLH is able to cope with pres- sures up to 20 bar, while the SLX can cope with pressures as high as 50 bar. Just like Stafsjö’s other slurry valves, the SLH and the SLX are designed to give a tight shut-off, independent of pressure direction. The flow capacity is maximized with a full bore and minimal seat cavity, and at the same time, stresses and wear on the equipment are minimized, resulting in long service life of the valve and related process equipment.

FOCUS ON PETROCHEMICALS

19

Chemical Technology • June 2015