Line-shaft Vertical Type Sump Pumps (API Class VS4)

The model SIW is a single stage, closed single suction, volute type, line shaft vertical type pump.
No mechanical shaft seal type pump can be provided.(Model SIWN) Mechanical seal is not required for this model, so initial and maintenance cost can be saved. This model is suitable for non-hazardous and non-flammable service.
Semi-open impeller pump can be provided.(Model SIWO)
This model is suitable for pit drainage application.

Heavy duty construction is in 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 to start and operation
The pumps are usually under flooded suction, therefore ensure the elimination of priming and air handling problems.
Easy maintenance
Flanged spigot fit is adopted for casing and column for permanent alignment and easy maintenance.
High reliability
Strong design of the driver mount ensures stable pump operation.
Small installation space and easy installation
Shipment of preassembled pump (excluding the driver) simplifies field installation.

The driver mount is appropriately designed to prevent resonance which is the cause of vibrations.

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

Pump shaft with ample strength and rigidity minimize deflection and vibration.

Flanged spigot fit maintains precise alignment and as a result, prolongs bearing life.
In the case of no shaft sealing, pumping liquid flows out from the upper hole of column pipe in order to not reach up to floor level.

Closed clearance bushings minimize the shaft deflection.
These bushings are lubricated by pumping liquid(Standard).
These bushings can be lubricated by external source as an option.

Closed or semi-open single suction impeller is designed to meet the wide range of specific operating condition with the maximum efficiency.
The impeller is dynamically balanced to meet the API610 requirement.