Udor KAPPA 43 GR3/4 — 10.5 GPM (40 L/min) Diaphragm Pump

Pairing the KAPPA 43’s 40.0 L/min (10.5 GPM), 38 bar (560 PSI) output with a petrol-ready gear reduction box, the KAPPA 43 GR3/4 mounts directly onto a 3/4 inch shaft from a 4–6.5 HP engine. The reduction gearing steps the engine speed down to the pump’s 550 RPM without needing a belt drive, keeping the whole unit self-contained. At 39 lbs it is one of the heavier KAPPA petrol pumps, reflecting its higher-flow capability for demanding boom spraying jobs.

Specifications

Model	Udor KAPPA 43 GR3/4
Flow Rate	40 L/min (10.5 GPM)
Max Pressure	38 bar (560 PSI)
Speed	550 RPM
Drive Configuration	Gear reduction for 3/4″ shaft petrol engine, 4-6.5 HP
Weight	17.7 kg (39 lbs)
Type	Diaphragm Pump

Applications

• High-volume petrol boom sprayers
• Vineyard and orchard contractor spraying
• Trailer-mounted petrol spray units
• Standalone spraying away from mains or battery power
• Upgrading from a smaller GR3/4 KAPPA pump

Key Features

• Gear reduction for 3/4 inch petrol engine shaft, 4–6.5 HP
• 38 bar (560 PSI) maximum pressure
• 40.0 L/min (10.5 GPM) flow
• Desmopan diaphragm, anodised aluminium body
• No belt drive required

Technical Documents

• Udor KAPPA 43 GR3/4 Parts Schematic (PDF)
• All Udor Kappa Series Documents

Parts & Service

AES Waterblasters carries genuine Udor spare parts, diaphragm kits and valve kits for the Kappa series, with expert service and repairs from our Auckland workshop. Contact us on 09 271 4782 for parts, servicing or advice on the right pump for your application.

Related Models

Part of the Udor Kappa Series. Other models in this series:

• Udor KAPPA 7 12-Volt — 7.6 L/min (2 GPM)
• Udor KAPPA 15 12-Volt — 13.3 L/min (3.5 GPM)
• Udor KAPPA 15 GR3/4 — 13.3 L/min (3.5 GPM)
• Udor KAPPA 18 DC — 16 L/min (4.2 GPM)
• Udor KAPPA 32 — 36 L/min (9.5 GPM)
• Udor KAPPA 43 GR3/4LP — 40 L/min (10.5 GPM)