*mydirectindustry

Catalogs
RUHRPUMPEN
Split Case.

Split Case.

Product catalog summary

Overview
The document details the ZM I to III Axially Split Case, Heavy Duty API 610 Process Pump (BB1) by Ruhrpumpen, highlighting its innovation and reliability for demanding applications in industries such as oil fields, refineries, and petrochemical plants.

Specifications
The ZM pumps come in 60 standard sizes with 9 bearing assemblies, handling capacities from 150 to 10,000 m³/h and heads from 16 to 400 m. They operate at temperatures from -10° to 220°C and ambient temperatures down to -55°C. The discharge pressure can reach up to 40 bar, with discharge branch sizes from 150 to 800 mm.

Applications
These pumps are suitable for pumping various liquids including crude oil, liquid hydrocarbons, and different types of water, as well as chemical solutions. They are also used in tank farms and fire-protection systems.

Design and Construction
The pumps feature axially split, single-stage double volute casings with side-side suction and discharge branches. They are foot-mounted, with options for centerline mounting for higher temperatures. The design includes double volutes to reduce radial forces and optimized suction chambers for low NPSH values.

Materials
Constructed from materials like cast iron, carbon steel, and chrome-nickel steel, the pumps meet API 610 standards with wear rings and impellers.

Bearing Assembly and Shaft Sealing
The pumps have robust shafts with low deflection, using antifriction or sleeve bearings, and options for hydrodynamic bearings. Shaft sealing options include mechanical seals and soft packings.

Maintenance and Operation
Designed for easy maintenance, the pumps have removable upper casing halves for rotor access and can be driven by electric motors, diesel engines, or turbines, with variable speed drive options.

Performance and Testing
The pumps are tested at 1.5 times the maximum discharge pressure, ensuring reliability and efficiency under stringent quality standards.

Mechanical Features
The pump features ample stuffing-box chambers for mechanical seals, tapered shaft ends, and antifriction bearings. Thrust bearing assembly is on the non-driven side, with angular contact ball bearings absorbing axial forces. Heavy-duty designs use tilting pad bearings and sleeve bearings, with oil supply and cooling systems available.

Quality Control
Pressure-containing parts undergo comprehensive quality control, with tests confirmed by certificates. The casing is tested at 1.5 times the maximum allowable working pressure, with a minimum corrosion allowance of 3.2 mm.

Connections and Bearings
Drain and vent connections are provided at the lowest and highest points of the pump casing, with options for different valve types. Oil-rings supply lube oil to bearings, controlled by constant-level oilers.

Impeller and Casing Design
The impellers are double suction type, minimizing axial thrusts and ensuring low NPSHR levels. They are dynamically balanced and made using a ceramic-core process for optimal surface structure. Replaceable impeller and casing wear rings meet API 610 requirements. The pump casing features a double volute design to minimize radial forces.

Dimensions
Detailed dimensional drawings and tables are provided for various pump sizes, including ZM I, II, and III models, covering suction and discharge nozzle sizes, and various height and width measurements.

All RUHRPUMPEN catalogs and technical brochures

Archived catalogs

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

Brand list