Why use a progressive cavity pump?

Their pressure capabilities and viscosity handling is unrivalled, which means that whilst they are quite expensive in design and large in footprint, they are often selected for applications when all other pumping technologies will fail.

What are progressive cavity pumps used for?

The design is best suited to highly viscous and lubricating fluids including oils, sludges, waste matter, biomass, pastes and grape pressing that may contain very large solids, as well as pumping viscous products over long distances.

Are progressive cavity pumps self priming?

Yes! A progressive cavity pump's tight tolerances mean it has excellent suction capabilities.

Can progressive cavity pumps handle solids in my fluid?

Yes they have excellent solid handling capabilities! However, it should be noted that abrasive fluids e.g. low viscosity/water based fluids containing solids may cause shorter stator wear.

Can these pumps be supplied with hopper?

Our progressing cavity pumps can be supplied with auger feed allowing non-flowing mediums such as dry sludge and waste matter to be pumped without clogging. We can also provide liquid injection ports which are popular when liquid waste is added to dry content waste to allow it to flow.

Can progressive cavity pumps run dry?

No! Even short period of dry running can result in damange to the rotor and stator, making dry run protection a must if there is risk of this.

Need help choosing the right pump or technical advice? Call the team on 01773 533 283.

Nova Rotors DHS-JHS Progressive Cavity Pump With Increased Hopper

Sludge pump

Key Specifications
Max Flow Rate	11333lpm
Max Head	480M
Max Temperature	150°C
Max Viscosity	1,000,000 cP
Solids	30mm
Sizes	3/4" to 24"

Datasheet

Enquire now about this product

The Nova Rotors Diamond series includes the DHS-JHS Progressive Cavity Pump, which comes with hopper and an enlarged auger screw for feeding the product into the pump. This allows it to handle products with an even higher level of dry solids than the DH. The standard DHS model can do up to 35% of dry solid, and for even higher concentration (up to 40%) there is the DHSB progressive cavity pump which has an motorised conveyor feed fitted above the inlet to ease the flow of solids into the pump.

The helical rotor pump can be constructed of a range of materials including carbon steel, stainless steel and cast iron, which makes it suitable for many applications including dehydrated sludge, water treatment, biowaste, minced meat, fruits and vegetables and bio-waste.

For more guidance on how this pump works and the applications it is used for, read our progressive cavity pump guide.

DHS - Enlarged auger screw compared to the DH for concentration of dry solids up to 35%
DHSB - Hopper with motorised conveyor feed for high concentration of dry solids up to 40%
Optional inspection port to view the solids
One stage stator with long pitch geometry to improve performance
The stator is sealed at both ends, no o-ring is required
Newly designed rubber sleeve to compensate for any sharp solids in the fluid
Numerous seal options including; single mechanical seal, packing seal, double mechanical seal and cartridge
Integrated bearing lubrication system
Very high priming capability
Reversible flow up to 3 bar as standard: Up to 12 bar with hydraulic balance.
Able to pump fluids with solids in suspension.
Capable of handling liquids with a viscosity up to 1,000,000cp
Low pulsations for shear sensitive fluids
230V, 3 Phase 50hz / 60hz motors available
API, ATEX, Food Grade EHEDG, 3A and Marine certification available

Key Benefits:

The Nova Rotors DHS-JHS Series Sludge Pumps with Hopper are available with the following material options:

Nova DHB-JHB1.jpg

How the Nova Rotor DHS Progressive Cavity Pumps Work – Animation

FAQs

It consists of a spiralled helical rotor (like a cork screw) that sits tightly inside a rubber stator/sleeve. As the rotor turns inside the stator, it forms a set of fixed-shaped cavities that progress along the length of the stator and force the fluid inside to move along with them as they turn.