1. What is a peristaltic pump and how does it function?
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A peristaltic pump, or hose pump, is a positive displacement pump that uses rollers or shoes attached to a rotating rotor to compress a flexible hose. As the rotor turns, it pushes the fluid forward, creating a vacuum that draws in new fluid.
2. What is the main difference between a hose pump and a roller pump?
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Hose pumps use sliding shoes that compress the hose with high friction, suitable for high pressures up to 16 bar. Roller pumps use rolling bearings that reduce friction, lowering hose wear, and are ideal for pressures under 8 bar.
3. What are the main advantages of peristaltic pumps?
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Key benefits include complete isolation of the fluid within the hose, no mechanical seals or packings to leak, exceptional abrasion resistance for slurries, and dry running capability without damage.
4. How often should a peristaltic pump hose be replaced?
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Hose lifetime depends on the pump speed, pressure, and chemical compatibility. Parsa reinforced hoses typically last between 1,500 and 5,000 hours of continuous operation.
5. How can I maximize my peristaltic hose lifespan?
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By maintaining proper lubricant (silicone grease) in the casing, correctly calibrating roller/shoe shimming, operating at lower rotational speeds (under 60 RPM), and flushing the hose after use.
6. Do these pumps have self-priming capability?
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Yes. The complete occlusion of the hose coupled with its elastic recovery creates a strong vacuum, allowing the pump to lift fluids from depths of up to 9.5 meters of water without manual priming.
7. What hose materials are available?
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We supply Natural Rubber (NR) for abrasives, EPDM for corrosive chemicals and acids, NBR for oils and fats, and Silicone for sanitary pharmaceutical applications.
8. What parameters affect the pricing of a peristaltic pump?
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Pricing depends on the hose diameter (flow capacity), design pressure, casing materials, motor/gearbox brand, and specified hose material.
9. Can peristaltic pumps transfer fluids with large solid particles?
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Yes. These pumps can transfer fluids with up to 80% solids. They can handle particles with diameters up to 25% of the hose's inner diameter without clogging.
10. Are Parsa pumps manufactured domestically?
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Yes, all heavy castings, rotors, and industrial hoses are engineered and produced in Iran with coordination from our technical offices in Sweden.
