Rotary lobe pump EP series

for wastewaterelectricself-priming

Overview
The EP series rotary lobe pump is engineered for continuous operation under extreme conditions and high differential pressures. It handles abrasive, chemically aggressive and flammable media and is suitable for medium temperatures up to 200 °C. The pumps deliver pressures up to 18 bar with low pulsation and very quiet operation thanks to a helical high-performance gearbox.

Key benefits

• High efficiency from a one-piece, flow-optimized housing with low dead space
• Continuous high-pressure capability (up to 18 bar differential)
• Operates with media up to 200 °C
• AirGap separation to protect gearbox and transmission in case of leakage
• Low vibration and quiet running due to helical gearbox
• Multiple sealing options to meet industry standards including API-Cartridge (EP only)

Features (detailed)

• Helical high-performance gearbox: reduced vibration levels, enabling high differential pressures and long service life
• One-piece housing: flow-optimized, low dead space design that improves efficiency and simplifies cleaning and maintenance
• AirGap: atmospheric separation between gearbox and pump chamber to prevent liquid ingress into the gearbox
• CIP/SIP capable: design supports easy cleaning, flushing and disinfection
• Material options: abrasion-resistant gray cast iron (standard), ADI, stainless steel; optional duplex or nickel-based alloys; wear-resistant coatings and heat treatments available
• Lobe variants: wide selection of geometries and materials (NBR, NBR white, EPDM variants, CSM, FKM, PU, stainless steel, nitrided steel); straight, double-wing, 3/4/6-wing and HiFlo lobes for pulsation-free pumping
• Axial and radial wear plates: high wear-resistant special steel to extend maintenance intervals and reduce downtime

Options

• Radial and axial wear plates
• HiFlo® lobes for pulsation-free pumping and improved suction
• ATEX-compliant versions for explosive atmospheres
• Speed sensor for precise flow and drive-speed monitoring
• Seal options: Quality-Cartridge, CoX-Cartridge, API-Cartridge (API for EP only)

Models

• EP136 — example model in the EP series designed for high demands and high pressures

Application areas
The EP series is used where abrasive, chemically aggressive or hot media must be pumped reliably: oil & gas, chemical and petrochemical industry, paints and varnishes production, sugar production, tank farms and other heavy industrial applications requiring high operational reliability.

Technical specifications

• Max differential pressure: up to 18 bar
• Max medium temperature: up to 200 °C (depending on configuration)
• Suitable media: abrasive, chemically aggressive, low- to high-viscosity liquids, flammable media
• Housing: one-piece, flow-optimized, low dead space
• Gearbox: helical high-performance gearbox (quiet, low vibration)
• Protection: AirGap separating gearbox and pump chamber
• CIP/SIP capable: yes (low dead space design)
• Materials: gray cast iron, ADI, stainless steel; optional duplex or nickel-based alloys
• Lobe materials and geometries: multiple options including HiFlo lobes
• Sealing options: Quality-Cartridge, CoX-Cartridge, API-Cartridge (EP series)
• Optional features: ATEX version, speed sensor, wear-resistant coatings