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

The model RTH is horizontal, axially split, two stage, single or double suction, double volute, centerline support, between bearings process pump.
The RTH is suitable for low NPSH, large capacity and middle pressure 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 design and double suction impeller design, or opposite impeller stage arrangement reduces radial force and thrust force balance of the pump, achieving stable 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.
This ensures satisfactory seal performance.
Centerline support design prevents misalignment caused by thermal expansion.
Side suction and side discharge nozzles are integrally cast with lower half casing, therefore allowing removal of the rotor without disrupting driver and piping connections.

Closed single or 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.
Opposite impeller layout or balanced construction of double suction impeller 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 API682 and API610.
Upon request, gland packing can be installed.

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.