**Product Specifications:** - **Model No.:** NP-L - **Impeller:** Open - **Usage:** Pumps - **Pump Type:** Centrifugal - **Drive Type:** ZVZ/CRZ/CV/DC - **Power:** Motor/Diesel - **Capacity:** 2.34–7920 m³/h - **Discharge Size:** 20 to 550 mm - **Head:** 6–50 m - **Trademark:** Naipu - **Transport Package:** Packed in wooden boxes or as per customer request - **Specification:** International Standard - **Origin:** China - **HS Code:** 8413701090 --- **Product Description:** The **Naipu® NP-L series** is a rugged, heavy-duty centrifugal slurry pump designed for medium to lower head applications. It combines the proven design of the NP-AH(R) series with high-efficiency impellers, offering an attractive initial cost and reliable performance. The pump is ideal for demanding industrial environments where durability and efficiency are essential. Featuring interchangeable liner options—ranging from metal to various grades of elastomer—the NP-L series can be customized to suit different applications, including chemical processing, heavy minerals, plant water supply, thickener overflow, paper and pulp, and slag granulation. This pump is known for its robust construction, ease of maintenance, and ability to handle low-abrasive slurries efficiently. Its design ensures long service life, reduced downtime, and improved operational efficiency. --- **Key Features:** - High-efficiency impellers for better performance - Durable construction with optional materials for harsh environments - Flexible power options (motor or diesel) - Wide range of capacities and discharge sizes - Available with multiple drive types for different applications - Easy to maintain and service --- **Technical Parameters:** | Model | Max Power (kW) | Capacity (m³/h) | Head (m) | Speed (rpm) | Efficiency (%) | NPSH (m) | Impeller Vane Count | Impeller Diameter (mm) | |-------|----------------|------------------|----------|-------------|----------------|-----------|----------------------|------------------------| | 20A-NP-L | 7.5 | 2.34–10.8 | 6–37 | 1400–3000 | 30 | - | 4 | 152.4 | | 50B-NP-L | 15 | 16.2–76 | 9–44 | 1400–2800 | 55 | 3.5–8 | 5 | 190 | | 75C-NP-L | 30 | 18–151 | 4–45 | 900–2400 | 57 | 3–6 | 4 | 229 | | 100D-NP-L | 60 | 50–252 | 7–46 | 800–1800 | 60 | 2–3.5 | 4 | 305 | | 150E-NP-L | 120 | 115–486 | 12–51.5 | 800–1500 | 65 | 2–6 | 4 | 381 | | 200E-NP-L | 120 | 234–910 | 9.5–40 | 600–1100 | 64 | 3–6 | 4 | 457 | | 250F-NP-L | 120 | 396–1425 | 8–30 | 500–800 | 77 | 2–10 | 5 | 550 | | 300S-NP-L | 560 | 468–2538 | 8–60 | 400–950 | 79 | 2–10 | 5 | 653 | | 350S-NP-L | 560 | 650–2800 | 10–59 | 400–840 | 81 | 3–10 | 5 | 736 | | 400ST-NP-L | 560 | 720–3312 | 7–51 | 300–700 | 80 | 2–10 | 5 | 825 | | 450ST-NP-L | 560 | 1008–4356 | 9–48 | 300–600 | 80 | 2–9 | 5 | 933 | | 550TU-NP-L | 1200 | 1980–7920 | 10–50 | 250–475 | 86 | 4–10 | 5 | 1213 | --- **Construction Materials:** | Component | Standard Materials | Optional Materials | |----------|--------------------|--------------------| | Liners | Chrome Alloy, Natural Rubber | Acid Resist™ Neoprene, Butyl, Nitrile, Hypalon | | Impellers | Chrome Alloy, Natural Rubber | Acid Resist™ Neoprene, Butyl, Nitrile, Hypalon | | Casing | SG Iron | N/A | | Base | SG Iron | MS, Fabricated | | Expeller | Chrome Alloy or SG Iron | Acid Resist™ | | Expeller Ring | Chrome Alloy or SG Iron | Acid Resist™ | | Shaft Sleeve | SG Iron | Acid Resist™ | | Seals | Rubber and Nitrile | Neoprene, Viton | --- **Applications:** - Chemical Processing - Heavy Minerals - Plant Water Supply - Thickener Overflow - Paper and Pulp - Slag Granulation The **NP-L series** is a versatile and durable solution for industries that require reliable and efficient slurry pumping systems. Whether you're dealing with low-abrasive materials or need a pump that can withstand tough conditions, the NP-L series offers the right combination of performance and value.

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