PTFE Chemical Pump

Fluorine-lined centrifugal pumps are mainly used to transport corrosive chemical media. Since the corrosion-resistant fluoropolymer lining (PTFE or FEP) is applied to the inner wall of the pump and key flow parts (impeller, housing, etc.) through high-temperature sintering, a dense protective layer is formed, which completely isolates the contact between the medium and the metal. This enables the fluorine-lined centrifugal pump to resist the erosion of a variety of chemical substances, making it the "industry darling" for corrosive fluid transportation.   I. Applicable media for fluorine-lined centrifugal pumps 1. Strong acids Typical examples: concentrated sulfuric acid, hydrochloric acid, nitric acid, hydrofluoric acid, phosphoric acid   2. Strong alkalis Typical examples: sodium hydroxide (caustic soda), potassium hydroxide, ammonia   3. Organic solvents Typical examples: benzene, acetone, carbon tetrachloride, ester solvents   4. High purity and food grade applications Main application scenarios: electronic grade hydrofluoric acid, pharmaceutical intermediates, food additives   II. Main advantages of fluorine-lined centrifugal pumps 1. Excellent chemical stability The fluorine polymers in fluorine-lined centrifugal pumps are "immune" to more than 200 chemicals, especially in mixed acid environments (such as nitric acid + HF pickling solution) and alternating corrosion conditions.   2. Wide temperature range Low temperature performance: PTFE lining of fluorine-lined centrifugal pumps remains flexible at -196°C (suitable for liquid nitrogen delivery) High temperature resistance: FEP material of fluorine-lined centrifugal pumps can withstand 150°C continuously and short-term temperature resistance up to 200°C (e.g. hot concentrated sulfuric acid)   3. Enhanced comprehensive performance Impenetration resistance: High crystallinity and tight molecular structure prevent medium penetration Wear resistance: Carbon fiber/glass fiber modification triples wear resistance   4. Cost-effectiveness Service life: 5-8 years for fluorine-lined centrifugal pumps (the longest among corrosion-resistant chemical pumps) Reduced maintenance: fluorine-lined centrifugal pumps have fewer wearing parts, enhanced durability, and lower TCO   III. Operational considerations for fluorine-lined centrifugal pumps 1. Material compatibility Avoid: Reactive media (molten alkali metals: Na, K) Certain fluorinated solvents (e.g., perfluoroethers that cause expansion)   2. Operational limits Temperature threshold: PTFE ≤180°C, FEP ≤150°C Solid content: When the solid content exceeds 5%, use an open impeller or wear-resistant lining   3. Key practices Prevent dry running of fluorine-lined centrifugal pumps (fluorine polymers have poor thermal conductivity and there is a risk of overheating) Drain the medium thoroughly during long shutdowns to avoid crystal accumulation   Professional consultation is recommended For the best selection of fluorine-lined centrifugal pumps, consult a certified engineer or technical expert. Changyu Pumps and Valves - a leading manufacturer of fluorine-lined centrifugal pumps - is ready to provide tailor-made solutions!