Model: SST Series Pumps
The SPEW SST Series Twin Screw Pump is a heavy-duty rotary positive displacement pump designed for continuous, stable, and efficient transfer of fluids across an extremely wide viscosity range. The pump is specifically engineered to handle low-viscosity, non-lubricating liquids as well as very high-viscosity and shear-sensitive fluids, making it suitable for a broad spectrum of industrial applications.
Unlike centrifugal pumps, the SST pump delivers predictable, pressure-independent flow, ensuring stable operation even under fluctuating system pressures. The pump utilizes two synchronized, non-contacting screws rotating in opposite directions inside a precision-machined casing. Fluid is transported axially in sealed cavities from suction to discharge with minimal internal turbulence, negligible pulsation, and low shear stress.
External timing gears ensure accurate synchronization of the screws, eliminating metal-to-metal contact and reducing wear. Bearings are positioned outside the pumped fluid zone, allowing the SST pump to operate reliably in high-temperature, abrasive, or contaminated services. The design supports bi-directional operation, self-priming capability, and tolerance to entrained gas, making it ideal for terminals, marine duty, oil & gas installations, and demanding process applications.
1. Non-Contacting Twin Screw Design
Feature:
Two precision-machined screws rotate without physical contact, synchronized by external timing gears.
Benefit:
2. Wide Viscosity Handling Capability
Feature:
Capable of pumping fluids from 1 cSt up to 3,000,000 cSt.
Benefit:
3. Near Pulsation-Free Flow
Feature:
Axial displacement of fluid through continuous cavities.
Benefit:
4. Bi-Directional Operation
Feature:
Pump can operate in both rotational directions without modification.
Benefit:
5. Self-Priming Capability
Feature:
Positive displacement principle with excellent suction characteristics.
Benefit:
6. Low Shear & Gentle Product Handling
Feature:
Minimal internal turbulence and controlled cavity movement.
Benefit:
7. External Bearings & Gearbox
Feature:
Bearings and timing gears are located outside the pumped fluid.
Benefit:
8. Flexible Sealing Arrangements
Feature:
Supports single, double, and cartridge mechanical seals with API flush plans.
Benefit:
9. VFD Compatibility
Feature:
Linear relationship between speed and flow.
Benefit:
1. Pump Structure Type
2. Casing Structure
3. Rotor & Shaft Structure
4. Bearing & Gear Arrangement
5. Sealing Structure
6. Mounting Structure
7. Protection & Auxiliary Structures
Delivering quality-engineered pumping systems for industries worldwide. Our mission is to provide precision, performance, and reliability in every pump we produce.