Topline L Series

High-Pressure Plunger Metering Pump for Demanding Industrial Applications

The L Series plunger pump is engineered to handle extreme operating conditions, supporting pressures up to 500 bar (7,252 psi) and flow rates up to 5,500 l/h (1,210 gph) in a single-head configuration.

Its robust design makes it ideal for severe industrial applications including high-pressure boiler feed, catalysts dosing, scale inhibition, and corrosion inhibitors.

Built to meet the highest standards in the metering industry, this positive return plunger pump features a modular head design capable of hosting multiple heads to precisely match process dosing needs.

A dedicated oil reservoir reduces the risk of contamination between process liquid and hydraulic system, ensuring long-term accuracy and operational safety.

Key Features

• Flow rate from 0.2 to 5,500 l/h (0.04 to 1,210 gph)

• Working pressure up to 500 bar or 7,252 psi

• Chemical-resistant coated cast iron enclosure

• ‍AISI 316 and PVC liquid end options

• Manual stroke length adjustment; electronic actuator available

• Built-in relief valve, air purge valve, and self-replenishing hydraulic system

• Integrated diaphragm rupture detection system

• Supports process fluid temperatures up to 280°C

• Steady-state accuracy ±1%, linearity ±3%, repeatability ±3%

• ‍API675 and ATEX 2014/34/UE compliant

• NEW: Configuration available for EC 1935/2004 Food Contact Regulation

‍

Applications

The L Series is ideal for high-pressure industrial dosing applications, including: