FEATURES COMPARED (Click on item in the left column to go to details)

Transcription

1 Special points of interest: Two centrifuge manufacturers that produce machines with similar special features that distinguish them from the other brands that are present today on the North-American market. Features like the open scroll and the independent scraper have proven their advantages in the past. FEATURES COMPARED (Click on item in the left column to go to details) PIERALISI DRYCAKE/CBB Replace sludge discharge bushings 1-2 days Hardened steel Minutes Silicon carbide Replace sludge scraper mechanism 1-2 days 1 hour Access to liquids weir plates Difficult access Easy access Scroll feed inlet Open scroll construction Hard surfacing Standard: No protection Hollow steel structure Narrow slots Castolin Eutalloy CPS 1229 Standard: Tungsten carbide spray Solid bar steel Wide slots Tungsten carbide flame sprayed by hand G-FORCE High G machine up to 18.5 diameter 25.5 diameter Removing the rotating assembly 1/2 day 1 hour

2 SLUDGE DISCHARGE BUSHINGS Pieralisi Bushing CBB Bushing Replacing the sludge discharge bushings The sludge discharge ports are usually the first affected by wear of the decanter. All dehydrated solids are removed through these bushings. PIERALISI: The bushing have to be removed from the inside In order to replace the bushings, the scroll has to be removed from the drum. Consequently because of this operation, it is advisable to replace the seals and eventually even the bearings. Replacing the bushings represents almost the same labor as an overhaul, takes several hours and requires other parts to be re-placed. CBB: The parts are kept in place with an external mounting that can be replaced without special tools and only takes minutes MATERIALS OF CONSTRUCTION Pieralisi hardened steel CBB Standard: Silicon carbide

3 SLUDGE DISCHARGE BUSHINGS

4 SCRAPER MECHANISM Driven by a chain running around a copper bushing in order to replace the complete machine has to be disassembled Mechanism with gears and roller bearing. The slow moving bearings have unlimited life span. Limited lifespan because of wear of the soft bushing

5 SCRAPER MECHANISM

6 FEED INTAKE Hollow sheet metal Full bar sheet Pieralisi: Standard: no extra protection. The scroll is built around 4 hollow sheet metal that are welded together. When perforated, re-welding is virtually impossible. For larger models (jumbo and larger) a protection plate can be welded in. However, when this plate gets removed because of wear on the welds, extreme damage can be done to both the scroll and the drum interior. Because the pipes are hollow, the opening or solids intake with is reduced CBB: The scroll is built around 4 bar steel metal pipes that welded together. Even after extreme wear, it can always be repaired.

7 LIQUID WEIR PLATES

8 SCROLL Open scroll construction: Because of the open scroll construction, the feed pipe can be adjusted with an optimal precision. This can be done while the machine is in full operation Pieralisi: The scroll is built around 4 hollow sheet metal pipes that are welded together. When perforated, re-welding is virtually impossible. Slots are narrow, not leaving a lot of space for hardsurfacing. Standard: AISI304 CBB: The scroll is built around 4 full bars metal pipes that are welded together. The solid plate has a much longer life span and can always be built up by welding. Slots are wide for all models Standard: AISI 304

9 HARDSURFACING Castolin Eutalloy CPS 1229 Tungsten carbide flame sprayed

10 G-Force and dimensions Model Main motor power (kw) Drum revolution max rpm Centrifugal force max x g Slenderness ratio L/D Length Drum diameter inches Drum diameter (mm) Hydraulic capacity L/H Pieralisi Baby Pieralisi Baby Pieralisi Baby Pieralisi FP 600 / M Pieralisi FP 600 RS / M Pieralisi FP 600 2RS / M Pieralisi Jumbo Pieralisi Jumbo Pieralisi Jumbo Pieralisi Jumbo Pieralisi Mammoth Pieralisi Mammoth Pieralisi Giant CBB CD CBB CD 30 S CBB CD 30 SI CBB CD CBB CD 30I CBB CD 40 S 15-18, CBB CD 40 SI 15-18, CBB CD 40 18, CBB CD 40 I 18, CBB CD 50 S CBB CD 50 SI CBB CD CBB CD 50I CBB CD 65 S CBB CD 65 SI CBB CD CBB CD 65 I CBB CD CBB CD 80 I

11 REMOVING THE ROTATING ASSEMBLY