These coatings are being developed to protect the interior surfaces of sulphuric acid pumps and other equipment to enhance their lifespan in extremely adverse operating conditions.

http://www.sulphuric-acid.com/techmanual/strong%20acid/sa_acidpumps.htm#:~:text=In%20a%20sulphuric%20acid%20plant,Submerged%20and%20Horizontal%20Centrifugal%20Pumps.&text=Submerged%20vertical%20centrifugal%20pumps%20for,the%20industry%20for%20several%20reasons.

Chas. S. Lewis & Co., Inc.

Lewis offers pumps specifically developed for 93 to 99% sulphuric acid and oleum service up to 2000 m³/h (8000 USGPM) capacity and 10 to 50 m (30-165 ft) liquid head. Pumps are available in sizes 2½ through 14 in standard material specifications and lengths to 12 ft. Custom lengths are available on request.

Features of Lewis Pumps are:

• LEWMET® nickel-chrome allow used for critical parts which are subject to high velocity, corrosion and abrasion such as impellers, wear rings, journals, and bearings.
• Casing and other major parts supplied in Lewis Process Iron with a large corrosion allowance for extended life.
• Matching joints incorporate acid proof O-rings and sealed cap-nut bolting to prevent corrosion of vital mechanical components.
• One piece Carpenter 20 Cb-3 shafts of premium yield strength, straightened and fitted with PTFE cover for high temperature duty.

All Lewis Pumps feature a shaft seal that is not exposed to the liquid being pumped. A simple stuffing box is sufficient to seal the rotating shaft in tanks that operate at or near atmospheric pressure. For applications where the pump tank is under pressure or vacuum a deeper stuffing box is available with provision for a lantern gland for use with an external sealing medium such as instrument air.

JH Pumps

JHB sulphuric acid pumps are designed and manufactured for sulphur chemistry applications. They are submerged vertical centrifugal pumps, which have been provem in the market for years. Capacities are up to 3200 m³/h and 55 m head with a single impeller and 210 m with 2 impellers.

Features of JH Pumps are:

• Patented special alloy for wetted parts
• Low maintenance
• Less power consumption
• More reliable performance
• Two types of shaft seals that are leak free and easy to maintain
• Lower shaft bearing made of high chromium nickel alloy that is lubricated by the pumped fluid
• Double support structure at driven end with a double row angular contact ball bearing to balance axial force
• Grid coupling that features accurate alignment and vibration absorption

FRIATEC-Rheinhütte GmbH & Co

Rheinhütte offer vertical submerged centrifugal pumps in capacities up to 1200 m³/h.

The features of the Rheinhütte pump are:

• Compact double volute casing to balance out radial loads
• Closed impeller
• Low flow velocity giving minimal corrosion damage
• Shaft column separate from discharge pipe
• Modular construction
• 22 pump sizes with 5 different shaft diameters and thrust bearing lanterns
• Materials (1.4136 HRS, Sigub) are available to handle concentrated sulphuric acid (99-99.5%) up to a a temperature of 260°C (500°F).
• All wetted shaft sleeves sealed with O-rings, therefore no crevice corrosion

Ensival-Moret S.A.

Ensival-Moret produce a vertical submerged centrifugal pump for strong acid service with capacities up to 1600 m³/h. The pump differs in design from the other suppliers in that the central column that houses the pump shaft is also used to bring the liquid up and out of the pump.

The features of the Ensival-Moret pump are:

• Fully relieved gland packing
• Multi-stage construction if required to achieved required head
• Fully symmetrical pump casing which enbles the submerged bearings to operate under zero load
• Stuffing box protected the bearing in the gaseous pahse against corrosion by acid vapours

Two different arrangements are available which differ in the way the acid exits the central column. Arrangement 2 is shown in the picture.

There are many manufacturers and suppliers of horizontal centrifugal pumps suitable for sulphuric acid service. The key is the right selection of materials and specification of the right type of seal.

Hydrogen Generator Applications for Our Pumps

Hydrogen is an abundant resource but requires processing. Hydrogen must be separated from other elements in order to be used in other applications. Magnetic drive pumps are used to supply water and pressure to the process.

March pumps are built for complex applications like these. A commonly used pump, the 893-10, is a seal-less centrifugal magnetic drive pumps capable of a maximum flow of 2.7 gallons per minute at 1 foot with a shutoff head of 10.5 feet, or 4.5PSI. This hydrogen generator pump is designed to tolerate a maximum internal pressure of 50PSI and maximum liquid temperature of 190 Fahrenheit.

https://www.marchpump.com/applications/mag-drive-pumps-hydrogen-generators/

Seeking a pump for the chemical Sulfuric Acid, March Pumps has many choices! From 5 GPM to 200 GPM, March Pumps has a pump for Sulfuric Acid for the application.

https://www.marchpump.com/applications/chemical-transfer/sulfuric-acid-pumps/