Axially Split Single Stage Between Bearings Pumps (API Class BB1)

The model SD-S is horizontal, axially split, single stage, double suction, double volute, foot support, between bearings process pump.
The SD-S is suitable for low NPSH, large capacity application.

Heavy duty construction is full compliance with API610
Seal chamber
Seal chamber dimensions are in full compliance with API682 and API610 standards, and dual seals can be installed with our standard seal chamber dimension.
Easy maintenance
Overhaul can be carried out without removing main piping and driver.
High reliability
Double volute casing reduces radial force. Double suction impeller provides thrust force balance.
The full-circular construction of the bearing housing and high precision dynamic balance ensure smooth operation and long bearing life.

The casing is designed in full compliance with API610. (design pressure, nozzle force and moment, etc.)
Casing gasket is appropriately selected to meet the specific liquid and the specific operating condition, ensuring satisfactory seal performance.
Side suction and side discharge nozzles are integrally cast with lower half casing, therefore allow removal of the rotor without disrupting driver and piping connections.
Double volute construction evenly distributes radial forces.

Closed double suction impeller is designed to meet the specific operating condition with the maximum efficiency and low NPSH-required.
The impeller is dynamically balanced to meet the API610 requirement.
Balanced construction of double suction reduces thrust loads and prolongs bearing life.

Renewable wear rings are furnished.

Shaft deflection is minimized for longer bearing life and shaft seal life.

Mechanical seal is applicable to all seal types and plans in accordance with API610 and API682.
Upon request, gland packing can be installed.

Bearings and lubrication systems are available in three configurations to meet service conditions and the requirements of API610.

ball radial and angular contact ball thrust / flooded lubrication
sleeve radial and angular contact ball thrust / oil ring lubrication
sleeve radial and tilting pad thrust / pressurized lubrication

Full circular bracket construction minimizes vibration of bearing housing. So pump vibration is much lower than the limit of API610.
If high temperature service is specified, suitable cooling system is furnished.