Synchronized Two-Screw Pumps

Z-Series

represents the latest generation of synchronized, two-screw pumps designed for high flow rates, low-viscosity, non-lubricating, aggressive, or solid-contaminated media. Featuring a double-suction, contact-free spindle design via precision timing gears, the Z-Series ensures high suction capability and zero contact between pumping elements, maximizing service life in extreme environments.

  • Synchronized timing gears prevent rotor contact, allowing the handling of abrasive, non-lubricating, and low-viscosity fluids without wear.

  • Hydraulically balanced double-suction design eliminates axial thrust on bearings while delivering massive capacities up to 17,660 l/min (1,060 m³/h).

  • Built to meet international marine and petrochemical standards, including optional API 676 compliance, welded steel casings, and magnetic couplings.

  • Casing options in ductile iron or fabricated steel allow customized connection angles, sizes, and flange standards (DIN/ANSI).

Z-Series
Product Line Flange Diameter Shaft Seal Type Max. Pressure Poles / Drive Flow Rate (Capacity)
KRAL Z-Series (Z 80 – Z 150) DN 80 – DN 150 Single / Double Mech. Seal / Mag-Drive 25 bar (362 psi) 4 / 6 / 8 330 – 1,800 l/min
KRAL Z-Series (Z 200 – Z 300) DN 200 – DN 250 Single / Double Mech. Seal / Quench / Mag-Drive 25 bar (362 psi) 4 / 6 / 8 1,800 – 5,500 l/min
KRAL Z-Series (Z 350 – Z 450) DN 300 – DN 350 Cartridge Mech. Seal / API 682 / Mag-Drive 25 bar (362 psi) 4 / 6 / Gear 5,500 – 11,000 l/min
KRAL Z-Series (Z 500 – Z 600+) DN 400 + (Fabricated) API 682 Cartridge Seal / Hermetic Mag-Drive 25 bar (362 psi) 6 / 8 / Gear Drive 11,000 – 17,660 l/min
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