Pump maintenance for pulp and paper
A pulp mill pumps everything: fibrous stock that clogs, hot corrosive black liquor, aggressive bleaching chemicals and enormous volumes of white water. All feeding a machine that does not stop. Hydro Pumps maintains the sector's pumps with what it demands: materials for combined abrasion and corrosion, sealing that lives with fiber and fast response when production is at stake.
The pumps of the pulp and paper process
From chipping to the reel, every stage has a difficult fluid and a suffering pump.
Stock pumps
Pulp transport at varied consistencies — special impellers and seals that live with fiber.
Black and green liquor
Hot, corrosive, solids-laden fluids of the chemical recovery cycle — the plant's most severe service.
White water and machine circuits
Large flows in continuous recirculation feeding the paper machine — absolute reliability.
Bleaching chemicals
Chlorine dioxide, peroxide and caustic — corrosives demanding specific alloys and seals.
Vacuum and dewatering
Wire and press vacuum systems — their efficiency defines the machine's productivity.
Utilities and effluents
Intake, effluent treatment and the utilities sustaining continuous operation.
Fiber, heat and chemistry — the sector's triple challenge
Materials and sealing for the real service
Pulp and paper pumps fail at the combination: fiber abrasion, chemical corrosion and process temperature, all at once. We restore components with alloys and coatings selected for that combination — and specify sealing that lives with fiber without clogging or burning.
Stock pump impellers, liquor casings and white water assemblies leave the workshop with restored dimensions, G2.5 balancing and bench testing.
The machine does not wait
Paper machine downtime is measured in tonnes lost per hour. Our service to the sector prioritizes availability: fast inspection, urgent repair when needed and a spares strategy for the process's critical positions.
At planned general shutdowns, we come in with closed scope and parts in hand — the list of pumps overhauled within the window, documented pump by pump.
Severe service
Abrasion + corrosion + heat
Equipment
Stock, liquor, white water
Sealing
Fiber-specific solutions
Urgency
24/7 service available
Questions from pulp and paper operators
Do you service high-consistency stock pumps?
Yes — stock pumps across consistencies: restoration of special impellers, clearance restoration, sealing suited to fiber service and testing before return. For discontinued parts, we manufacture to drawing via reverse engineering.
What materials do you use for black liquor pumps?
Alloys selected for the combination of alkaline corrosion, temperature and solids in the liquor — typically stainless grades suited to the service, with coatings where erosion concentrates. Specification starts from the actual conditions of your plant's recovery loop.
Can you serve the mill's general shutdown?
Yes — it is the sector's typical routine: scope closed at prior inspection, parts and crew positioned before the window, simultaneous execution across multiple pumps and an individual dossier per equipment at the end of the shutdown.
And when a critical pump fails with the machine running?
Our 24/7 field service sends a crew for diagnosis and an immediate swap to the spare, while the damaged pump goes to urgent repair at the workshop. We also help build the spares strategy for positions that cannot wait.
Services and content for your sector
Pump Overhaul
Complete restoration for the sector's severe service.
Gland Packing & Seals
Sealing that lives with fiber, heat and chemicals.
24/7 Field Service
Machine at risk? Immediate field response.
Sulzer Pumps
Process pumps for pulp and paper.
Mill pumps that need a capable partner?
Talk to engineering — from the stock pump to the liquor, we serve the whole process across Brazil.