Zenit APG550 4.00kW 415v Cast Iron High Head Pump (Max 490LPM/380kPa)

The Zenit APG550 is a heavy-duty, high-head submersible pump from the Zenit Grey Series, engineered for clear water, rainwater, and seepage in demanding civil, industrial, and commercial applications. With a maximum head of 38 metres and flow rates up to 490 litres per minute, the APG550 is the perfect solution for pressurised water transfer, decorative fountains, irrigation, and any application that requires high-pressure reliability.

Its rugged cast iron construction, high-head impeller, and robust mechanical seal system deliver outstanding durability and safe operation — even in potentially explosive atmospheres, thanks to ATEX Ex d flameproof certification.

FEATURES

• ATEX Certified Ex d — Flameproof for explosive environments (II 2G Ex db IIB T4 Gb, Ex h IIB T4 Gb)
• High Head Hydraulic Design — Consistent high-pressure performance for fountains and irrigation
• High Efficiency — Up to 50.1% hydraulic efficiency for lower energy costs
• Rugged Cast Iron Construction — Casing and impeller made from EN-GJL 250 cast iron
• Stainless Steel Shaft (AISI 431) — Corrosion-resistant with secure tapered impeller coupling
• Dual Silicon Carbide Mechanical Seals (2SiC) — Enclosed in a large oil chamber with integrated leakage detection sensor
• Leakage Detection System — Monitors the oil chamber to protect the motor and seals
• Anti-Clogging Hydraulic Profile — Special hydraulic design helps expel solids and prevents fouling
• Universal GAS Cable Gland — Protects the power cable from turbulence and aggressive liquids
• Pressurised Factory Testing — Every unit is tested to guarantee perfect seal and assembly integrity
• Stainless Steel Handle — Durable handle for lifting and positioning

SPECIFICATIONS

• Brand: Zenit Pumps
• Series: Grey – APG High Head
• Power Supply: 415 V, 50 Hz (Three-phase)
• Rated Power (P2): 4.00 kW / ~5.5 HP
• Max Flow Rate: 490 L/min (8.2 L/s)
• Max Head: 38 m (3.8 bar / 380 kPa)
• Outlet Size: G 2” – DN32 (EN 1092-2)
• Impeller Type: High head impeller
• Free Passage: 8 mm
• Motor Poles: 2 Pole (~2876 RPM)
• Motor Type: Dry asynchronous motor with thermal protection and leakage sensor
• Max Liquid Temperature: 40°C
• pH Range: 6 – 14
• Max Fluid Density: 1100 kg/m³
• Max Starts per Hour: 30
• Hydraulic Efficiency: 50.1%
• Noise Level: <70 dB (submerged)
• Ingress Protection: IP68
• Insulation Class: H
• Cable: 10 m (4G1.5 + 3x1)
• Construction Materials:
• Pump Case & Impeller: Cast Iron EN-GJL 250
• Shaft: Stainless Steel AISI 431
• Seals: 2 x Silicon Carbide (2SiC) + V-Ring
• Gaskets: NBR
• Coating: Bi-epoxy 200 µm, sea water resistant
• Screws: Stainless Steel A2-70
• Weight: ~57.6 kg (excluding ring stand and guiding system)
• Certification: ATEX Ex db IIB T4 Gb, Ex h IIB T4 Gb
• Warranty: 12 Months (Parts & Labour)

APPLICATIONS

• Stormwater and wastewater treatment plants
• Civil sewage and lifting systems
• Livestock farms and agricultural wastewater
• Underground car parks and stormwater pits
• Industrial water treatment and process waste
• Ideal for liquids containing suspended solids, filaments or low-density sludge