{"id":4068,"date":"2026-03-24T11:44:02","date_gmt":"2026-03-24T11:44:02","guid":{"rendered":"https:\/\/changyupump.com\/?p=4068"},"modified":"2026-03-28T12:00:11","modified_gmt":"2026-03-28T12:00:11","slug":"nitric-acid-pump-selection-guide-2026","status":"publish","type":"post","link":"https:\/\/changyupump.com\/pt\/blog\/nitric-acid-pump-selection-guide-2026\/","title":{"rendered":"Guia de sele\u00e7\u00e3o de bombas de \u00e1cido n\u00edtrico 2026"},"content":{"rendered":"\n

A nitric acid pump<\/strong> is a chemical transfer pump designed to move nitric acid safely without leaking, corroding, or overloading the motor. Because nitric acid<\/a> is both a strong acid and a powerful oxidizing agent, the pump material, seal style, and suction conditions all matter more than in ordinary chemical service. At Changyu Pump<\/strong>, with more than 20 years of industry experience, we help buyers match the pump to the real acid concentration and process conditions instead of guessing from a catalog name.<\/p>\n\n\n\n

\"nitric<\/figure>\n\n\n\n

Why does nitric acid need a special pump?<\/h2>\n\n\n\n

Nitric acid is difficult to handle because its chemical behavior changes with concentration and temperature. In dilute service, some stainless-steel<\/strong> options may be acceptable, but higher concentrations usually require PTFE, PFA<\/strong>, or FEP-lined<\/strong> construction because these fluoroplastics resist corrosion better in aggressive acid duty.<\/p>\n\n\n\n

Nitric acid<\/strong> is also relatively heavy, so pump sizing cannot follow water- service rules. Specific gravity affects motor load, impeller performance, and total head, which means the same pump can behave very differently once the acid is hot or more concentrated.<\/p>\n\n\n\n

Nitric acid pumps selection at a glance<\/h2>\n\n\n\n
Nitric Acid Condition<\/th>Recommended Pump Material<\/th>Seal Type<\/th>Main Risk If Wrong<\/th><\/tr><\/thead>
Dilute nitric acid<\/td>304L stainless steel or PTFE<\/td>Mechanical seal or magnetic drive<\/td>Corrosion and seal wear<\/td><\/tr>
Commercial nitric acid<\/td>PTFE \/ PFA lined<\/td>Magnetic drive preferred<\/td>Leakage and vapor escape<\/td><\/tr>
Fuming nitric acid<\/td>Pure PTFE \/ PFA<\/td>Sealless magnetic drive<\/td>Rapid material attack<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Note:<\/em> if concentration, temperature, and suction conditions are not matched to the pump design, the system can fail long before the pump reaches its expected service life.<\/p>\n\n\n\n

How to choose the right nitric acid pump?<\/h2>\n\n\n\n

Engineers at Changyu Pump<\/strong> emphasize that nitric acid<\/strong> selection starts with chemistry, then moves to hydraulics. A good pump choice should consider concentration<\/strong>, temperature<\/strong>, specific gravity<\/strong>, total head<\/strong>, suction conditions<\/strong>, and dry-run risk<\/strong>, not just flow rate.<\/p>\n\n\n\n

1. Match material to concentration and temperature<\/h3>\n\n\n\n

The first step is material compatibility. For lower concentrations, selected stainless-steel designs may work if the temperature stays controlled. For higher concentrations or fuming service, fluoroplastic-lined designs are usually the safer choice because they reduce corrosion risk and lower the chance of premature failure.<\/p>\n\n\n\n

2. Size for specific gravity<\/h3>\n\n\n\n

Nitric acid can be significantly heavier than water depending on concentration. That means motor power must be sized for the real liquid density, not for water-based assumptions.
What this means for you:<\/em> if the motor is undersized, it may trip, overheat, or fail during startup.<\/p>\n\n\n\n

3. Check total head and suction conditions<\/h3>\n\n\n\n

Pump selection should include total dynamic head, suction lift, suction line length, and friction loss in the piping. If suction conditions are poor, cavitation can damage the impeller and shorten pump life.
What this means for you:<\/em> even a chemically correct pump can still fail if the piping layout is not designed properly.<\/p>\n\n\n\n

4. Decide whether you need a seal or a sealless design<\/h3>\n\n\n\n

Mechanical seals can work in some acid-transfer jobs, but seal wear remains a maintenance risk. Magnetic-drive pumps remove the shaft seal and are often preferred when leak control is the priority.
What this means for you:<\/em> if your plant is focused on reducing leakage and maintenance, a sealless design may be the better long-term option.<\/p>\n\n\n\n

Which nitric acid pumps do we recommend?<\/h2>\n\n\n\n

Once the acid concentration and operating conditions are clear, the next step is to choose the right pump architecture. Some nitric acid duties need maximum leak prevention, while others need higher flow or stronger structure. Changyu Pump offers several models that fit different transfer conditions, so the best choice depends on your process rather than on one generic pump type.<\/p>\n\n\n\n

FZB Fluorine-Lined Self-Priming Centrifugal Pump<\/a><\/h3>\n\n\n\n

The FZB series is a practical choice when the liquid must be lifted from a lower tank or an underground source before transfer begins. Its self-priming design helps remove the need for manual filling of the suction line, while the fluorine-lined wetted parts provide the corrosion resistance needed for aggressive acid service.
What this means for you:<\/em> if your process involves suction lift, frequent restart, or line emptying, the FZB series can reduce startup trouble and improve operating safety.<\/p>\n\n\n\n

\"FZB<\/a>
Self-Priming-Pump<\/figcaption><\/figure>\n\n\n\n
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