WITNEAT PUMP Launches IH Series Chemical Pumps

A: The IH Series is designed to tackle various corrosive liquid transfer challenges. Below are several representative scenarios, each accompanied by key process parameters and selection considerations:

Scenario 1: Alkali and chlor‑alkali industry

Typical media include ammonia brine mother liquor in soda and ammonia‑soda production, ambient‑temperature caustic alkalis (10–32% concentration, 40–60°C) in chlor‑alkali production, and chlorine products and chlorates. These media are highly corrosive and may contain trace crystals, demanding high material integrity and seal reliability. The IH Series, with stainless steel wetted parts and single mechanical seals, performs reliably; for temperatures above 80°C, a double mechanical seal with cooling circulation is recommended.

Scenario 2: Metallurgy and electroplating

In processes such as electrolyte transfer for copper/nickel electrolysis (copper/nickel sulphate solutions with free acid, 50–70°C) and steel pickling waste acid (hydrochloric or sulphuric acid, 5–15% concentration, 60–85°C), the IH Series’ corrosion resistance and cavitation resistance ensure long‑term leak‑free operation. If the waste liquid contains minor suspended solids (<0.5 mm, <5% content), it remains suitable; higher solids content would require a pre‑filter.

Scenario 3: Fine chemicals and pharmaceuticals

When transferring organic solvents (e.g., acetone, ethanol, ethyl acetate), acid/alkali solutions, and reaction intermediates, these media are often flammable, volatile, or toxic. The IH Series can be equipped with double mechanical seals and a seal flushing system to achieve zero leakage, while the pump body can be mirror‑polished to prevent residue and meet GMP cleanliness requirements. The temperature range covers -10°C to 100°C, satisfying most synthesis and purification steps.

Scenario 4: Environmental protection and wastewater treatment

Acidic/alkaline wastewater from chemical parks and electroplating plants (pH 1–13, ambient to 60°C) often contains trace salts and corrosive ions. The IH Series can be used for lift pumping from collection tanks and for neutralisation circulation. For high‑salt wastewater, 316L or duplex stainless steel can be specified to significantly extend service life. Field data show continuous operation exceeding 8,000 hours in sulphuric acid waste (pH=2) without notable corrosion.

① Medium viscosity – The IH Series, as a centrifugal pump, has its performance curves calibrated with water. When fluid viscosity exceeds 200–500 cP, internal friction losses in the impeller increase sharply, causing significant reductions in head and flow, while shaft power rises exponentially. Forced selection can not only burn out the motor but also induce severe cavitation, shortening seal and bearing life. WITNEAT’s philosophy is “delivery with stability” – if the viscosity falls outside the pump’s economical operating range, our engineers will openly advise you of the risks, rather than sacrificing your long‑term maintenance costs for a short‑term order.

② Medium temperature – Standard IH Series pumps handle -20°C to 105°C. For higher temperatures, cooling measures (such as double‑seal cooling systems) enable service up to 300°C.

③ Solid particle content – The IH Series is intended for clean liquids with little or no solid content. For slurries or high‑solids media, alternative pump types should be considered.

④ Seal type – Packing seals or mechanical seals can be specified, with universal seal covers. For highly corrosive or valuable media, mechanical seals are recommended to ensure zero leakage.

⑤ Material matching – Select the appropriate stainless steel grade or fluoroplastic‑lined version based on the corrosivity of the medium, ensuring that wetted materials are fully compatible.

WITNEAT provides professional pre‑sales selection consulting services, helping customers choose the most suitable pump configuration based on a thorough understanding of operating conditions.