1. Valves And Flow Controls Industrial Automation Control For Sale
  2. sku: 11917048077288983
  3. KNF NMP830KNDC

KNF NMP830KNDC Miniature Diaphragm Pump

Nmp830kndc Knf Miniature Diaphragm Pump

( Brand: Knf ), ( Manufacturer Part Number: NMP830KNDC ), ( Part Type: Pump ), ( Country Of Origin: Switzerland )

Review KNF Miniature Diaphragm Pump

The **KNF NMP830KNDC** is a high-performance, compact **miniature diaphragm pump** engineered for precision fluid transfer, vacuum generation, and sensitive applications where space efficiency and reliability are paramount. Part of KNF s renowned **NMP series**, this pump delivers exceptional performance in a footprint as small as 83 mm in diameter, making it an ideal solution for laboratory settings, medical devices, aerospace instrumentation, and automated industrial processes. Its **dual-diaphragm design** ensures smooth, pulsation-free operation, minimizing shear stress on delicate fluids while maintaining consistent flow rates and pressure stability. Constructed from **high-grade stainless steel (AISI 316L) and corrosion-resistant materials**, the NMP830KNDC is built to withstand harsh environments, including exposure to aggressive chemicals, sterile conditions, and temperature fluctuations, making it suitable for both cleanroom and industrial applications. The pump s **hermetically sealed magnetic drive system** eliminates the need for external seals or lubricants, reducing maintenance requirements and preventing contamination a critical advantage in pharmaceutical, biotech, and semiconductor manufacturing. With a **maximum flow rate of up to 12 L/min (at 0 bar)** and a **vacuum capability of down to -80 mbar**, it excels in applications requiring precise fluid handling, such as peristaltic pumping, sample aspiration, or vacuum-assisted processes. Its **silent operation** and low vibration levels further enhance its suitability for sensitive analytical instruments and precision machinery. The NMP830KNDC is equipped with **KNF s proprietary NMP control electronics**, offering intuitive digital interfaces for flow rate adjustment, pressure monitoring, and diagnostic feedback, ensuring seamless integration into automated systems. Whether used for **liquid transfer, gas evacuation, or vacuum sealing**, this pump combines durability, precision, and compact design to meet the demands of modern engineering and scientific research.

**Pros and Cons of buying a KNF NMP830KNDC Miniature Diaphragm Pump**

The KNF NMP830KNDC is a compact, oil-free diaphragm pump designed for precision fluid handling in laboratory, medical, and industrial applications. Below is a detailed analysis of its advantages and limitations.

### **Pros**

1. **Oil-Free Operation**

The pump uses a dry-running diaphragm design, eliminating the need for lubricants or oil. This reduces contamination risks in sensitive applications such as pharmaceuticals, biotechnology, and cleanroom environments.

2. **Compact and Lightweight**

Its miniature size (120 mm 120 mm 100 mm) makes it ideal for space-constrained setups, such as benchtop laboratories or portable systems. The lightweight construction also simplifies installation and integration.

3. **High Precision and Repeatability**

The pump delivers consistent flow rates and pressures, making it suitable for applications requiring accurate dosing, such as HPLC (High-Performance Liquid Chromatography), gas chromatography, or sample injection systems.

4. **Wide Flow Range**

With a maximum flow rate of 300 mL/min and a maximum pressure of 1 bar (or higher with optional configurations), it accommodates various fluid handling needs, from low-volume aspiration to moderate-pressure applications.

5. **Quiet Operation**

Diaphragm pumps are generally quieter than positive displacement or centrifugal pumps, reducing noise in laboratory environments.

6. **Versatile Media Compatibility**

The pump can handle a wide range of fluids, including gases, liquids, and aggressive chemicals (depending on material compatibility), provided they are within the specified limits (e.g., viscosity, temperature).

7. **Low Maintenance**

Since it lacks moving parts like gears or impellers, wear and tear are minimized. The diaphragm and valves are the primary components requiring occasional inspection or replacement, extending the pump s operational lifespan.

8. **Energy Efficiency**

Diaphragm pumps are typically energy-efficient, consuming less power than larger or more complex systems for similar flow requirements.

9. **Compatibility with Control Systems**

The pump can be integrated with electronic controllers for precise flow regulation, making it suitable for automated processes in research and industrial settings.

10. **Cleanability and Hygiene**

The absence of internal lubricants and the ability to disassemble for cleaning make it easier to maintain hygiene standards, which is critical in medical and food-grade applications.

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### **Cons**

1. **Limited Maximum Pressure**

While the standard model supports up to 1 bar, some applications may require higher pressures. Optional configurations or specialized models may be needed, increasing cost.

2. **Flow Rate Limitations**

The maximum flow rate of 300 mL/min may be insufficient for high-volume applications. Larger pumps or multiple units may be required for scaling up.

3. **Material Restrictions**

The pump s materials (e.g., PTFE, PVDF, or stainless steel) may not be compatible with highly corrosive or abrasive fluids without customization, potentially requiring additional filters or seals.

4. **Cost**

As a precision instrument, the KNF NMP830KNDC is more expensive than basic diaphragm pumps or other fluid handling devices. The initial investment may be higher, though long-term reliability can offset this.

5. **Sensitivity to Particulates**

Like all diaphragm pumps, it can be affected by debris or particulates in the fluid, which may clog valves or damage the diaphragm over time. Filtration may be necessary in dirty environments.

6. **Limited Temperature Range**

The pump s operational temperature range is typically between 0 C and 60 C (or similar, depending on the model). Extreme temperatures may require additional cooling or heating systems.

7. **Noise at High Frequencies**

While generally quiet, some users report slight vibrations or noise at higher speeds, which may be noticeable in sensitive environments.

8. **Dependence on Power Supply**

Like all electronic pumps, it requires a stable power source. Fluctuations or outages can disrupt operation, though this is a common issue across most laboratory equipment.

9. **Replacement Parts Availability**

While KNF is a reputable brand, replacement diaphragms, valves, or seals may not be readily available from third-party sources, potentially increasing downtime if parts are delayed.

10. **Learning Curve for Installation**

Proper installation, including correct tubing connections and calibration, may require technical expertise. Improper setup can lead to reduced performance or damage.

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### **Conclusion**

The KNF NMP830KNDC is an excellent choice for applications requiring **precision, oil-free operation, and compact design**, particularly in laboratories, medical devices, or cleanroom environments where contamination and maintenance are critical concerns. Its strengths lie in its **reliability, cleanliness, and adaptability** to a variety of fluids. However, its **limited flow rate, pressure constraints, and higher cost** may make it less suitable for high-volume or high-pressure industrial processes where larger or more robust pumps would be more appropriate.

For users prioritizing **accuracy, hygiene, and space efficiency** in moderate-flow applications, this pump is highly recommended. Those needing **higher pressures, larger volumes, or extreme temperature resistance** may need to consider alternative models or supplementary equipment.

### **Recommendation**

**Buy the KNF NMP830KNDC if:**

- You require an oil-free, compact pump for laboratory, medical, or cleanroom applications.

- Your fluid handling needs involve moderate flow rates (up to 300 mL/min) and pressures (up to 1 bar).

- Contamination control, ease of cleaning, and low maintenance are priorities.

- You are willing to invest in a high-quality, durable pump for precision tasks.

**Consider alternatives if:**

- You need higher pressures or flow rates beyond the pump s specifications.

- Your application involves highly abrasive or extreme-temperature fluids without proper material upgrades.

- Cost is a major constraint, and a more basic or lower-cost pump would suffice for your needs.

For most precision fluid handling tasks where reliability and cleanliness are paramount, the KNF NMP830KNDC is a well-justified purchase. Always verify compatibility with your specific fluids and system requirements before finalizing the decision.

Details:

30 Day Warranty. Pulled out from a Brand New industrial enclosure. Location: Bin 6. Please look at the pictures, you won't be disappointed.

Up for sale is a Preowned KNF NMP830KNDC Miniature Diaphragm Pump.

part #: nmp830kndc prices

  • $110.00-$295.00

specifications valvplu:

  • brand: Knf
  • mpn: Nmp830kndc
  • part type: Pump
  • country of origin: Switzerland

payments valvplu:

  • credit card: Visa
  • other
  • wallet: Paypal

offer valvplu:

  • best offers: True
  • quantity: 1
  • availability: In Stock
  • sold: 0
  • started: April 12, 2026
  • options: Ship-to-home

seller valvplu:

  • city: Apopka, Florida
  • # reviews: 200
  • rating: 100.0%

shipping valvplu:

  • type: Calculated
  • carrier: USPS
  • transit: 4-10 Days
  • class: Standard, Expedited
  • cost: $8.97
  • service: USPS Ground Advantage, USPS Priority Mail

general valvplu:

  • Pumps Pump Accessories > Vacuum Pumps > Diaphragm Pumps
  • condition: Used

returns valvplu:

  • method: Money back
  • policy: Returns Accepted
  • paid by: Buyer
  • time: 30 Days
part type: pump, country of origin: switzerland,
category: business & industrial > pumps pump accessories > vacuum pumps > diaphragm pumps, sku: 11917048077288983,
Knf NMP830KNDC Is Similar To:
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4 offers $110.00–$295.00 USD
  • Used. Offer #1 priced at $295.00 + $9.69 shipping estimate = $304.69* total. Up for sale is a Preowned KNF Miniature Diaphragm Pump.+$9.69 shipping
  • Used. Offer #2 priced at $110.00 + $41.00 shipping estimate = $151.00* total. KNF NEUBERGER B 24V, NMP 830 KNDC for RECIF Load Port.+$41.00 shipping
  • New – Open box. Offer #3 priced at $127.50 + $18.00 shipping estimate = $145.50* total. Pmax: +100kPa(1.0bar). (KORNIT DIGITAL ,KNF.+$18.00 shipping
  • New – Open box. Offer #4 priced at $341.96 + $78.92 shipping estimate = $420.88* total. +$78.92 shipping

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