Ampco's newest pumps – the ZL Series rotary lobe pumps – are a perfect choice for sanitary and non-sanitary applications involving viscous fluids. The ZL Series' unique front-loading seal design provides faster maintenance, easier cleaning, and reduced downtime versus competitor's PD rotary pumps. Both rotors and product seals may be accessed by simply removing the front cover while the pump's process connections remain in place.

An optional, low-cost O-ring or PTFE lip seal provides for additional flexibility in unique applications. All available seal options fit into the same rotor case and may be easily field-replaced, even after the pump has been installed. Optional thermal jackets are also available for the pump cover and casing for applications where the pump needs to be heated or cooled. And, hardened materials of construction for the pumps' wetted components are available in order to accomodate abrasive fluid media.

Bi-wing type rotors and tri-clamp process connections are standard: optional single-wing, tri-lobe and multi-lobe rotors are available, as well as NPT, BSPP, DIN, and ANSI flange-type connections. The standard finish for the 316 Stainless Steel pump components is 32 Ra. An optional 16 Ra surface finish is available.

A specially-designed version of the ZL pump is also available for road-tanker applications.

ZL Series Primary Design Considerations:

• Less vibration and noise thanks to a precision-ground helical timed gear
• Improved ease-of-assembly and maintenance with front-loading design
• High efficiency bi-wing or tri-lobe rotors and other rotor configurations are available
• Universal mounting for easy placement
• More hygienic than competing designs

ZL Series Features:

• Four modular designs
• Twelve displacements
• Flow rates to 440 gpm (1,660 lpm)
• High flow rate to 880 gpm (3,330 lpm)
• Pressures to 170 psi (11.7 bar)
• Viscosity to 100,000 cp
• 316 Stainless Steel contact parts standard, 316L optional
• EHEDG and 3A certified

ZL Series Shaft Seal Features:

• Unique Front-Loading Mechanical Seals
• Solid Seal Face
• Clean and Compact
• Fitted with the Pump On-line
• Various Seal Options
• Less Down Time and More Productivity
• Lower Maintenance Cost
• No entrapment to Seal Area
• Available Seal Materials: Silicon Carbide, Tungsten Carbide, Titanium Carbide, Carbon, Stainless Steel