Mechanical Seal Centrifugal Pumps | Hygienic & ATEX | Seal Pumps and Valves

Why specify a mechanical seal rather than a packed gland

• No visible leakage, so no product loss and no contaminated floor.
• No gland adjustment or repacking as a routine maintenance task.
• Lower friction, and therefore a lower running cost.
• Suitable for hygienic duty, where packing cannot be cleaned or validated.
• Available in single or double arrangement, depending on the fluid.

Hygienic and ATEX construction

This range is built for explosive atmospheres as well as clean product:

• Centrifugal pump with Catex certificate for explosive atmospheres.
• Zone 1 or 2 (Category 2 or 3), temperature class T3, T4 or T5.
• Flameproof motor II 2G Exd IIC T5.
• Single or double Catex certified mechanical seal.
• Body-flange formed by microfusion, with the cold-stamped suction cover joined by screws.
• High hydraulic output from a semi-open impeller produced by microfusion techniques.
• GAS, DIN 11851 or DIN 2633 flange connections.
• Brushed matt finish and stainless steel baseplate.

Technical specifications

Typical applications

Alcohols, liquors, water, wine, beer, brine, acids, glycols, solvents, hydrocarbons and similar low to medium viscosity liquids. The AISI 316 wetted parts and hygienic flange options make the same pump suitable for food, beverage and pharmaceutical service as well as general chemical transfer.

Single seal or double seal?

A single seal is normally enough for water-like, non-hazardous liquids at moderate temperature. A double seal is specified when:

• the product must not leak to atmosphere at all (toxic, odorous, expensive),
• the pump runs dry or at low pressure intermittently,
• crystallising or polymerising liquids would damage a single seal face,
• the fluid needs a barrier or flush medium to stay stable.

Both arrangements are available Catex certified for the ATEX duties above.

Frequently asked questions

Frequently asked questions