Centrifugal pumps
Centrifugal pumps (also known as rotary pumps, radial pumps or radial wheel pumps) are hydraulic continuous-flow machines.
For decades now, Speck has been developing and manufacturing application-specific centrifugal pumps and setting new standards, especially with its innovative modular heat transfer pump system.
With a cutting-edge testing area for tests up to 750 m³/h and 400 m, Speck boasts an outstanding framework for research, development and series testing.
Areas of application
- Particularly well suited for high flow rates at relatively low pressures or delivery pressures
- Suitable for clear liquids with no abrasive contamination or solid content
- The adjustment to the operating point takes place by changing the impeller diameter; higher delivery pressures or higher pressures are achieved with multi-stage designs.
- Normal-priming, not suitable for the delivery of gas shares
Design
- Centrifugal pumps have enclosed impellers with a cover plate, and both open impellers and back vanes for small pumps with an EC motor
- Alongside single-stage pumps with a volute casing or inline casing, Speck also offers horizontal, multi-stage pumps with modular design.
Close-coupled pumps with mechanical seal
Advantages
- Universally deployable pumps which are suitable for many applications
- Small dimensions
Description
- The motor shaft is the pump shaft
- Threaded connections
- Mechanical seal made from carbon, SiC and FKM. Other material designs are available upon request depending on the respective medium
- Grey cast iron, spheroidal graphite cast iron or stainless steel designs
- Tmax
Water up to 140 °C
Oil up to 160 °C
Further media upon request
Close-coupled pumps with magnetic coupling
Advantages
- Universally deployable pumps which are suitable for many applications
- High-quality, robust and reliable pumps for continuous operation
- Low-maintenance and safe in operation
- Small dimensions
- High motor efficiency
Description
- High-quality magnetic couplings
- Threaded and SAE flanges
- Spheroidal graphite cast iron or stainless steel designs
- PM synchronous motor (VSD)
- Operation with frequency converter only
- Tmax
Water up to 160 °C
Oil -100 °C up to +300 °C, higher temperatures on request
Close-coupled pumps with EC motors
Advantages
- High-quality and reliable pumps
- Extremely small dimensions
- SiC sleeve bearings
- Low-noise
- Drive without bearing
Description
- Pumps with magnetic coupling (…-MK), force transmission by outer magnet
- Pumps with canned motor (…-MM), force transmission by motor winding
- Drives with EC motor, 24 V, 12 V upon request
- Designs made from high-quality plastic and stainless steel
- Tmax
Water up to 80 °C
Oil up to 80 °C
Further media upon request
Heat transfer pumps
Advantages
- High-quality, reliable pumps for low- and high-temperature applications
- Safe in operation, easy to service and robust
Description
- Modular system with 6 model series
- Pumps with mechanical seal or magnetic coupling, with a volute casing or inline casing, with a base plate or bracket
- PN 16, bearing brackets 360 and 470
- Pumps with centreline mounting and/or double volutes
- Spheroidal graphite cast iron and stainless steel designs
- Tmax
Hot water up to 160 °C, up to 180 °C upon request
Heat transfer oils from -100 °C to 350 °C, up to 400 °C upon request - ATEX II 2GD IIC cb TX
Boiler feed pumps
Advantages
- Reliable and universally deployable boiler feed pumps
- Modular system with 4 sizes
Description
- Horizontal pumps with modular design, with mechanical seal or stuffing box packing
- Robust external shaft bearings
- Hydraulically balanced impellers
- Grey cast iron or spheroidal graphite cast iron designs
- PN 40 and PN 63
- Tmax
Water up to 120 °C
Oil up to 120 °C
Further media upon request