Bareshaft Pump
The SA progressive cavity pump is constructed with a bareshaft design — giving significant flexibility in drive configurations. It is mounted directly onto the pump body without the need for any couplings, and suited to almost all industrial sectors handling low-viscous to viscous media, with or without solids.
DesignEncapsulated Cardan Joint
FlexibilityBareshaft Drive Configuration
HygieneCIP / SIP Ready
MediaSolids & Viscous Fluids
Design No Coupling Required
ROTOMAC™ SA Bareshaft Pump
Part of the ROTOMAC S Range, the SA progressive cavity pump is built around a robust, encapsulated cardan joint known for its versatility and long service life. Its bareshaft design mounts directly onto the pump body — eliminating the need for external couplings and giving engineers significant flexibility when specifying drive arrangements.
All ROTOMAC SA pumps can be used across almost all industrial sectors, handling low-viscous to highly viscous media — with or without suspended solids.
Why bareshaft? A bareshaft configuration lets the drive arrangement be selected freely — direct motor mount, belt drive, gearbox, or other options — without being locked into a fixed coupling design. This makes the SA pump highly adaptable to existing skid layouts and retrofits.
Details & Configuration
Everything you need to know about the SA Bareshaft Pump — from core benefits to full technical configuration options.
Economical
Food grade pump with careful considerations for food & hygienic applications — delivering hygienic performance without the premium price tag of specialist sanitary pumps.
Low Pulsing Conveying
Low shear and virtually pulsation-free pumping allow gentle transfer of sensitive products — even whole pieces — without damage to product structure or texture.
Robust Construction
Uses robust encapsulated cardan joints known for their versatility and long service life — engineered to withstand demanding, continuous industrial duty without compromising reliability.
Easy Clean
Carefully designed for excellent cleaning results in cleaning processes such as Clean-in-Place (CIP) and Sterilisation-in-Place (SIP) — reducing downtime between production runs in hygienic applications.
- Discharge Port
- Available with gauge connection, flange connections conforming to ISO, DIN & ANSI standards.
- Rotor
- Wear resistant and corrosion-resistant materials. Optionally with hard surface treatment.
- Conventional Geometry
- With shorter pitches, the geometry is for high pressure applications.
- Extended Geometry
- With a small rotor diameter and a long pitch, the extended geometry attains lower surface velocities and extends the service life due to its large sealing line.
- Stator
- The seal on both ends is molded as an integral part of the elastomeric stator.
- Suction Housing
- With large cross section and designed for smooth flow conditions, with drain plug and connections for pressure/vacuum gauge. Flange connections in DIN or ANSI can be rotated in 90° increments.
- Robust Cardan Type Joint
- Heavy duty, robust, long lasting cardan type universal joint — it can handle more load due to its inherent design. These joints offer a longer service life than the conventional pin joint.
- Yoke Shaft
- Connects the drive shaft to the joint. With gland packing, the plug-in shaft is used as a shaft protection sleeve. Upon request, it is available with wear resistant coating.
- Shaft Sealing
- Available in gland packing and also with flushing lantern ring, single mechanical seal, as well as double mechanical seals.
- Close Coupled Drive Connection
- For easy dismantling of the pump and drive, enabling quick replacement of the rotating parts and shaft seals. The yoke shaft pin secures the shaft connection to the drive, and the water thrower protects the drive from contamination/gland leakage.
- Body
- For connection of pump and drive and to secure the assembly to the baseplate or directly to the foundation.
- Drive
- Geared motors, variable speed drives, or frequency controlled motors of all major manufacturers, directly flanged to the pump without additional couplings or guards. Covers made of stainless steel are available.
- Dry Run Protection
- Dry run protection monitors the temperature of the stator and shuts the pump down when the limit value is reached, to protect the pump from dry running.
- Overpressure Protection
- The pressure gauge switches off the pump as soon as a pre-set pressure is exceeded or not reached, protecting the pump from increased wear and tear or piping damage.
- Seal Support Systems
- We offer seal flush, quench, and barrier type support systems. Barrier type systems protect the shaft sealing by selectively supplying barrier liquid. Also available with flow meter on request.
- Retensioning Device
- With this device, a worn stator can be evenly readjusted at several points so that the clamping between the rotor and stator is once again optimal and pump performance increases.
- Standard Baseplate
- Suited baseplate for mounting with geared motor, for standard applications. Specialized features available as per custom requirements.
- Sealing Options
- Standard Gland PackingUniversal seal for hopper and standard pumps for sealing the plug-in shaft and suction casing or feed hopper. Also available with grease or lantern ring to shut off the media flow. Can also be supplied with upstream labyrinth seal and additional flush connection or lubricating device.
- Multiple Acting Mechanical SealMechanical seals arranged in a row. Available in "back-to-back", "face-to-face", or "tandem" sequence.
- Cartridge Mechanical Seal
- Ready-to-install pre-assembled units with supply connections and attachment brackets for quick replacement.
Technical Specifications
Need an SA Bareshaft Pump?
Share your flow rate, pressure requirement, fluid type, and preferred drive arrangement — our engineers will confirm the right SA pump configuration for you.
Email Us
contact@rotomac.orgCall Us
+91 7522 002204 (Sales)Head Office
D-4a, Panki Industrial Area, Site-1, Kanpur – 208022, India