CGI Series
The CGI series are horizontal centrifugal pumps according to ISO 2858/EN 22858. The series is designed for particularly challenging applications with extra high demands for operational reliability. The service-friendly pumps are compact in size and highly reliable. The robust pump casing in cast iron with thick plastic liners ensures a very strong and reliable pump. The CGI series is an improved version of the previous CGD series.
Typical applications:
Sulfuric acid (H2SO4), Hydrochloric acid (HCl), Sodium hypochlorite (NaOCl), Nitric acid (HNO3), Caustic soda (NaOH), Phosphoric acid (H3PO4), Iron chloride (ZnCl2).
Material combinations
Suitable for pumping acids and bases. Media-contacting parts are in thermoplastics (PP, PVDF, PE-UHMW) and O-rings in (EPDM-FPM-FEP or FFKM). The series is available with a wide range of shaft seal types such as lip seal, single or double mechanical seals in internal or external design.
Open or closed impellers
Standardly supplied with partially open impellers that can handle some impurities, but can also be supplied with closed impellers for clean media upon request.
Accessories
- Drain hole
- Drip pan
- Thermo siphon system for double mechanical seals
Technical Structure and Advantages
- Front cover and back plate in S235JR-EN1025, guarantee strength and reliability even under harsh conditions.
- Linings in extra strong PP, PVDF, or PE-UHMW
- Hydraulically balanced impeller in PP, PVDF, or PE-UHMW. Partially open model for particle-laden and enclosed for clean fluids
- Shaft sleeves in PP, PVDF, or PE-UHMW protect the shafts. Rotate with the shaft but independent of the impeller
- Standardized mechanical shaft seals
- Extra strong front metal plate in S235JR-EN1025 carbon steel.
- Discharge flange in two halves, made of S235JR-EN1025 carbon steel.
- Single-row radial bearing.
- Balanced shaft in 42CrMo4 carbon steel (special alloys available on request), oversized for effective absorption of axial and radial forces and protected by sleeve in PP, PVDF, or PE-UHMW.
- Single-row radial bearing.
- Bearing housing in corrosion-resistant G25 cast iron.
Mechanical Shaft Seals
Elastomer Bellows Seals
Mechanical shaft seals for mildly aggressive, clean, and non-high-temperature media. Static and rotating rings in SiC, springs and holders in SS316 not in contact with the medium, elastomers in EPDM or FPM. Available as external type (B6E-B6EC), internal (B6I – B6IC – B6IH), or double mechanical type (B6EDF – B6EDFC).
PTFE bellows seals
Mechanical shaft seals for highly aggressive media and high temperatures. Static and rotating rings in three different material combinations (SiC-SiC, SiC-Al2O3, Al2O3-PTFE-C), PTFE bellows, springs, and holder in SS316 (non-media contacting). Available as an external type (JRS - JRS1 - JRA) or double mechanical type (JR2S - JR2S1 - JT2P - JR2A).
Seal with O-ring in elastomer
Mechanical shaft seal for moderately aggressive, clean, and non-extremely hot media. Static and rotating rings in two different combinations (SiC-SiC, Carbon-graphite-SiC), spring and retainer in Hastelloy C276, O-ring in EPDM or FPM. Available as an internal type (UMG-UMS) or double mechanical type (UM2G-UM2S).
Find out more about Chemical Pumps and CGI from Lobe
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