Zenit GRG 1000 Cast Iron Grinder Pump with Multi-Channel Open Impeller & Rotary Knife (Max 500LPM/530kPa)

The Zenit GRG 1000 is the most powerful model in the GRG series — a premium-grade grinder pump engineered for high-pressure transfer of sewage and heavily contaminated wastewater. Designed with a multi-channel open impeller and an advanced rotary knife cutting system, it delivers exceptional performance in industrial and municipal environments where solids, fibres, and long discharge lines present operational challenges.

With a maximum head of 53 metres (530 kPa) and a flow capacity of up to 500 litres per minute, the GRG 1000 is ideal for pumping stations, remote sewer pits, and industrial applications that demand maximum lift and reliable solids reduction.

FEATURES

• Integrated Rotary Knife Grinder System – Chromium steel blades grind solids before reaching the impeller
• Multi-Channel Open Impeller – Robust cast iron design ensures efficient hydraulic performance
• High Head Capability – Delivers up to 460 kPa (46 m) of head, ideal for long pumping lines
• Heavy-Duty Cast Iron Construction – Built to last with EN-GJL 250 cast iron body and impeller
• Dual Mechanical Seals – Silicon carbide (2SiC) seals in an oil chamber for long life and reliability
• Stainless Steel Shaft – AISI 431 shaft with tapered coupling ensures strength and corrosion resistance
• Anti-Clogging Design – Efficient solids expulsion and reduced impeller fouling
• Wet Installation – Suitable for fixed or portable sump setups (base plate sold separately)

SPECIFICATIONS

• Brand: Zenit Pumps
• Series: Grey – GRG
• Product Type: Submersible Grinder Sewage Pump
• Rated Power (P2): 10.0 kW / 13.4 HP
• Power Supply: 415 V (Three-phase, 50 Hz)
• Max Flow: 500 L/min
• Max Head: 53 m (5.3 bar / 530 kPa)
• Impeller Type: Multi-channel open impeller
• Grinder System: Rotary knife and counter-ring (Chromium steel)
• Free Passage: 0 mm
• Outlet Size: G 2” BSPF (DN32 or DN40 optional flange)
• Pump Body & Impeller: Cast Iron EN-GJL 250
• Shaft Material: AISI 431 Stainless Steel
• Seals: Dual Silicon Carbide (2SiC) + V-ring in oil chamber
• Ingress Protection: IP68
• Insulation Class: H
• Max Liquid Temperature: 40°C
• Fluid Density: ≤1100 kg/m³
• pH Range: 6 – 14
• Starts per Hour: Max 30
• Noise Level: <70 dB
• Installation: Wet installation with ZENS9024.006 ring stand (optional)
• Certification: Optional ATEX Ex d / IECEx configuration available

APPLICATIONS

• Remote or underground sewage pits
• Civil and municipal wastewater lift stations
• Agricultural and livestock effluent pumping
• Sludge handling in industrial plants
• Pumping into narrow or high-lift discharge pipes
• Areas with high fibre or solid content in sewage