Z (3000 / 5000 / 11000)

KRAL Z series two-screw pumps for aggressive, low- or non-lubricating and contaminated media, with flexible horizontal or vertical connection arrangements and external bearings. Three sizes (3000, 5000 and 11000) with a delivery rate of 330 to 17,660 l/min (20 to 1,060 m³/h), differential pressure up to 25 bar, temperature -40 to +300 °C and viscosity 0.7 to 100,000 mm²/s. Housing in ductile iron or welded steel, solid or engineered screws, heating electrical, by medium or steam; approvals ABS, BV, DNV-GL, LRS, RINA, ATEX group II category 2 and manufacture according to API 676 possible.

Key technical parameters

• Flow rate: 20 to 1,060 m³/h (330 to 17,660 l/min)
• Differential pressure: up to 25 bar
• Fluid temperature: -40 to 300 °C
• Viscosity: 0.7 to 100,000 mm²/s
• Installation: Horizontal (ZBH, ZEH, ZTH) or vertical (ZBV, ZEV)
• Casing material: Ductile iron or welded steel
• Screw material: Solid or engineered
• Seal: Single or double-acting mechanical seal
• Standard: API 676 possible
• Approvals: ABS, BV, DNV-GL, LRS, RINA; ATEX II 2

Media handled

• Liquids: Crude oil, Fuel oil, Diesel, Lubricating oil
• Media properties: Low viscosity, High viscosity, Abrasive

Applications and industries

• Marine
• Power generation
• Oil and gas
• Aggressive and contaminated media