FZX
Liquid Ring Pump

Self-Priming Hygienic Centrifugal Pump for Product Recovery and CIP Return

What is the FZX?

The Fristam FZX Series Liquid Ring Pump is a sanitary, self-priming centrifugal pump engineered to handle liquids that contain entrained air or gas. With its specialized impeller and housing design, the FZX can maintain prime and create vacuum lift, making it an excellent choice for applications that require complete evacuation of tanks, pipelines, and CIP systems.

Where is it Used? (Key Applications)

The FZX supports a wide range of processes across the food, beverage, dairy, and pharmaceutical industries. Common applications include:

• CIP Return Systems – Ensures efficient and thorough removal of cleaning solutions from tanks and lines.
• Aerated Products – Transfers foamed or air-entrained liquids such as ice cream mix, sweeteners, and glycerin.
• Drum & Tote Unloading – Provides lift capability up to 23 feet for easy transfer from containers.
• Shear-Sensitive Products – Gently moves cream, liquid egg, and yeast while protecting product quality.
• Texturizing Applications – Smooths the consistency of products like sour cream and yogurt at high back pressure.

This sanitary liquid ring pump provides new capabilities for handling products with entrained air.

By using a specially designed impeller and housing, the FZX maintains its prime when other pumps become air bound. This feature makes the FZX more efficient for complete evacuation of tanks and lines during normal process or CIP.

How Does it Work? (Theory of Operation)

The FZX uses a turbine-style impeller with tight internal clearances to form a rotating liquid ring within the housing. This design creates sealed chambers that move liquid and air together, producing the suction needed to lift product and return solutions. The result is a pump that reliably handles mixtures of fluid and gas while maintaining consistent hygienic performance.

Key Features and Benefits

• Self-Priming Capability – Reliably transfers liquids with entrained air.
• Efficient Product Recovery – Thoroughly clears tanks and pipelines, reducing product waste.
• Optimized for CIP Return – Supports consistent and complete cleaning cycles.
• Water & Chemical Savings – Less residual solution reduces utility usage.
• Versatile Operation – Bi-directional design allows processors to both load and unload with a single pump.
• Durable, Hygienic Construction – 316L stainless steel wetted parts, long seal life, and 3-A approval.
• High Lifetime Value – Low maintenance design supports long-term reliability.

Available Options

Fristam offers configurations to meet diverse process requirements:

• Models: Seven sizes with flow rates up to 400 GPM and heads up to 250 ft.
• Seal Materials: Carbon, silicon carbide, chrome oxide stainless steel.
• Elastomers: EPDM, Viton®, Buna, Silicone, Kalrez® and equivalents.
• Surface Finishes: Standard 32 Ra, with optional 25 Ra, 20 Ra, 15 Ra, electropolish, or passivation.
• Pharma Package: Validation and performance testing, Class VI elastomers, low ferrite, and up to 15 Ra electropolished surfaces.
• Additional Options: Stainless steel flange support, casing drain, bearing block mounted, adjustable base with legs.