G

KRAL G series three-screw pumps for the lubricating oil supply of rotating machinery such as compressors, gearboxes and turbines. Delivery rate 5 to 660 l/min, differential pressure up to 25 bar, temperature -10 to +120 °C with mechanical seal (up to 300 °C with magnetic coupling), viscosity 10 to 500 mm²/s (cold start up to 1,200 mm²/s). Horizontal or vertical installation, submersible or dry-mounted, axial or radial inlet rotatable in 90° steps, built-in tank variants. Construction according to API 676; ATEX options and marine approvals (ABS, BV, DNV, LR).

Key technical parameters

• Flow rate: up to 39.6 m³/h (660 l/min)
• Differential pressure: up to 25 bar
• Fluid temperature: -10 to 120 °C (300 °C with magnetic coupling)
• Viscosity: 10 to 500 mm²/s (cold start up to 1,200 mm²/s)
• Installation: Horizontal or vertical, submersible or dry-mounted
• Casing material: Nodular cast iron EN-GJS-400 or steel
• Screw material: Nitrided steel
• Seal: Mechanical seal, magnetic coupling, cartridge seal (API 682) or radial shaft seal
• Standard: API 676
• Approvals: ABS, BV, DNV, LR; ATEX II 3 G / 2 G

Media handled

• Liquids: Lubricating oil, Oil (mineral), Oil (synthetic)
• Media properties: Low viscosity

Applications and industries

• Lubricating oil supply for compressors, gearboxes and turbines
• Power generation
• Oil and gas
• Marine