SGK Internal Arc Gear Pump

Model: SGK

High-Temperature Positive Displacement Arc Gear Pump (up to 250°C)

The SPEW SGK Series Internal Arc Gear Pump is a high-temperature, high-performance rotary pump built for demanding industrial applications. Its precision-engineered round arc design, combined with full-body jacketing and heavy-duty metallurgy, provides leak-free, stable, and energy-efficient pumping up to 250°C.
Ideal for bitumen, asphalt, heavy oils, and polymer systems, the SGK ensures smooth flow, thermal reliability, and long-term operational safety — a benchmark of SPEW engineering excellence.

Description

The SPEW SGK Series is a high-temperature Internal Arc Gear Pump engineered for handling viscous, thermally sensitive, and heavy industrial fluids at elevated temperatures up to 250°C without performance loss or leakage risk.
Built on the proven round arc internal gear principle, the SGK pump ensures smooth, pulse-free flow and consistent volumetric performance across a wide viscosity range.
It is specially designed for bitumen, asphalt, heavy fuel oils, polymers, resins, waxes, and thermal fluids used in process industries, ensuring continuous and reliable operation under severe thermal conditions.

The SGK’s rugged construction, heat-resistant materials, and optional jacketed body and bearing housing allow for uniform heat distribution, preventing thermal distortion and maintaining optimal fluid properties throughout operation.

Features

High-Temperature Capability – Designed to operate continuously at temperatures up to 250°C with proper thermal expansion control.
Construction – Non jackets high Temerature casing & internal Gears,sealings.
Round Arc Gear Profile – Provides smooth, quiet, and non-pulsating flow while minimizing wear and internal leakage.
High Viscosity Handling – Ideal for fluids ranging from 50 cSt to over 500,000 cSt such as bitumen, tar, and heavy oils.
Reversible & Self-Priming – Allows bidirectional flow for transfer and recirculation applications.
Durable Bearing System – Designed with high-temperature bearings and thermally balanced shafts for long service life.
Material Versatility – Available in Cast Steel, Stainless Steel, Alloy Steel, or Ni-Resist for superior heat and corrosion resistance.
Seal Options – Equipped with high-temperature mechanical seals or graphite-packed glands suitable for hot fluid service.
High Reliability – Engineered for continuous-duty operation with low maintenance and exceptional mechanical stability.

Structure

The SGK pump consists of an internally meshing rotor and idler gear enclosed within a heavy-duty, Non jacketed casing. The thermal design ensures uniform temperature distribution and stable clearances during operation.

Main Components:

Casing: High Temerature casing Provides heating/cooling through seffecient heat absorbing & thermal expansion and keeping efficient circulation.
Rotor & Idler Gear: Machined from heat-treated alloy steel with round arc profiles for uniform torque transmission.
Shaft Assembly: Balanced and supported on high-temperature bearings with minimal radial loading.
Front & Rear Covers: Fully jacketed with optional temperature sensors or drain connections.
Seal Arrangement: High-temperature mechanical seal or graphite packing based on medium compatibility.
Optional Relief Valve: Built-in bypass for overpressure protection.