The special configuration of the body and rotor of the newly designed HP high pressure rotary valve by DMN Westinghouse does not only protect product against degradation, it also does not allow any axial air leakage. This means that this valve has an air leakage reduction of one third against other standard high pressure valves.
The DMN-Westinghouse HP rotary valves with specially designed inlet are very suitable for applications in the metering and pneumatic conveying of granular formed products under a high pressure of maximum 3.5 bar g. The configuration of the body, rotor and seals has been specifically developed to minimise degradation of the product which runs through it, whilst retaining the best possible pocket filling efficiency.
The HP valves are supplied with a 316 stainless steel body and aluminium end covers, in order to have maximum protection against wear. The standard full end disc rotor is made of 316 stainless steel and has 12 fixed blades. Due to the state of the art manufacturing facility, a high accuracy and tight rotor clearances can easily be attained. The end covers have outboard bearings, lubricated and sealed for life. The special construction of the shaft sealing guarantees the lowest air leakage. All models offer optimum venting through the large vent hole, so a maximum product flow into the vented pockets is guaranteed. DMN-Westinghouse fits SEW drives as their standard.
The HP valves are available in three consecutive sizes from 200 to 300, covering a capacity range of the rotor from 8.3 to 30 litre per revolution at 100% filling. The standard models are suitable for handling products up to a temperature of +80°C and a maximum pressure difference of 3.5 bar.