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  3. ケーエヌエフ・ジャパン KNF JAPAN
  4. 100,000 hours: KNF diaphragm pumps achieve astonishing longevity.
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  • Aug 07, 2026
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Aug 07, 2026

100,000 hours: KNF diaphragm pumps achieve astonishing longevity.

ケーエヌエフ・ジャパン ケーエヌエフ・ジャパン KNF JAPAN
The exceptional durability of diaphragm pumps is not a coincidence. At KNF, this durability is thoroughly pursued in the design. Pumps that operate for over 11 years under specified test conditions allow OEM manufacturers to enjoy benefits such as reduced failures, cost savings, and improved reliability in critical applications. Ten years is not enough—KNF demonstrates what long-term reliability means. The NMP 850.1.2, proven to withstand 100,000 hours of operation under specified operating conditions, has set a new standard for the lifespan of diaphragm pumps. This groundbreaking achievement is the result of outstanding engineering rooted in product development focused on reliability. A rigorous testing policy ensures that all products meet the highest standards. As a result, pumps have been realized that enable OEM manufacturers to build safer, more efficient, and more durable systems.
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NMP 850.1.2, completed 100,000-hour test of diaphragm pump | KNF
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nmp850kpdc.png

KNF NMP850 NMP850.1.2 Maintenance Procedure

This is the replacement procedure for the consumable parts diaphragm and valve. It can also serve as a reference for the maintenance procedures of other micropumps.

The maintenance procedures for the other gas pumps are generally similar, so please refer to them.

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NMP850K_DC-B_I.jpg

KNF NMP850 DC-BI Series Micro Diaphragm Pump

Integration of pump and motor, downsizing compared to conventional products, and improved durability. The long-selling micro gas pump NMP850 series.

- Customization is possible according to technical challenges. - Maintenance-free, contamination-free - High pump performance with a compact design - Long lifespan design, high durability - Variable flow rate (brushless motor) *Optional - No restrictions on installation direction Basic flow rate: 4.2 l/min Achievable vacuum level: 230 mbar abs Maximum allowable discharge pressure: 2.5 bar

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NMP850K_DC-B_I HP.jpg

KNF NMP850 DC-BI HP Series

Integrated pump and motor, downsized compared to conventional products, with improved durability. Evolution model of the NMP850 HP series.

- Maintenance-free, contamination-free - Long lifespan design - Compact size/high output design, no restrictions on installation direction - Compatible with wet gas and condensate gas - Well-balanced pressure reduction and pressurization characteristics - Variable flow rate (brushless motor) *Optional Basic flow rate: 7 l/min Achievable vacuum level: 220 mbar abs Maximum allowable discharge pressure: 2.2 bar

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NMP850KPDCB-2_KM54.png

KNF NMP850HP Series Micro Diaphragm Gas Pump

Evolution model of the long-selling product NMP850 series.

- Maintenance-free, contamination-free - Long lifespan design - Compact size/high output design, no restrictions on installation direction - Compatible with wet gas and condensate gas - Change to FDA-certified materials (optional) - Well-balanced pressure reduction and pressurization characteristics - Serial connection double head <50 mbar abs (optional) - Increased flow rate with double head type - Improved vacuum level with double head type (optional) Basic flow rate: 3.9 - 4.5 l/min (varies by material and motor) Achievable vacuum level: 230 - 300 mbar abs (varies by material and motor) Maximum allowable discharge pressure: 2.1 - 2.5 bar (varies by material and motor)

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NMP850KPDC.png

KNF NMP850 Series Micro Diaphragm Gas Pump

Long-selling NMP850 series micro diaphragm gas pump

- Customization according to technical challenges is possible. - Maintenance-free, contamination-free. - High corrosion resistance due to a wide variety of gas contact materials. - High pump performance despite a compact design. - Long lifespan design, high durability. - Variable flow rate (brushless motor). - No restrictions on installation direction. Basic flow rate: Single head 3.5 - 4.5 l/min (varies by material and motor) Double head 6.0 - 8.0 l/min (varies by material and motor) Achievable vacuum level: 230 - 300 mbar abs (varies by material and motor) Maximum allowable discharge pressure: 2.1 - 2.5 bar (varies by material and motor)

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NMP830KPDCB_HP.png

KNF NMP830HP Series Micro Diaphragm Gas Pump

Evolution model of the long-selling product NMP830 series.

- Maintenance-free, contamination-free - Long lifespan design - Compact size/high output design, no restrictions on installation direction - Compatible with wet gas and condensate gas - Change to FDA-certified materials (optional) - Well-balanced pressure reduction and pressurization characteristics - Serial connection double head <50 mbar abs (optional) - Increased flow rate with double head type - Increased vacuum level with double head type (optional) Basic flow rate: 5 l/min~ Achievable vacuum level: 230 mbar abs Maximum allowable discharge pressure: 3 bar (0.3 MPa)

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NMP830KNDC.png

KNF NMP830 Series Micro Diaphragm Gas Pump

Long-selling NMP830 series micro diaphragm gas pump

- Customization according to technical challenges is possible. - Maintenance-free, contamination-free - High corrosion resistance due to a wide variety of gas contact materials - High pump performance despite compact design - Long lifespan design, high durability - Variable flow rate (brushless motor) - No restrictions on installation direction Basic flow rate: Single head 2.1 - 3.1 l/min (varies by material and motor) Achievable vacuum level: 250 - 350 mbar abs (varies by material and motor) Maximum allowable discharge pressure: 1.0 - 1.4 bar (varies by material and motor)

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NMP830K_DC-B_I HP.jpg

KNF NMP830 DC-BI Series Micro Gas Pump

Integrated pump and motor, downsized compared to conventional products, with improved durability. Long-selling micro pump NMP830 series.

- Customization is possible according to technical challenges. - Maintenance-free, contamination-free - High pump performance despite compact design - Long lifespan design, high durability - Variable flow rate (brushless motor) *Optional - No restrictions on installation direction Basic flow rate: 2.5 l/min Achievable vacuum level: 250 mbar abs Maximum allowable discharge pressure: 1.4 bar

  • Other pumps

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NMP830K_DC-B_I HP.jpg

KNF NMP830 DC-BI HP Series Micro Gas Pump

Integrated pump and motor, downsized compared to conventional products, with improved durability. An evolved model of the long-selling NMP830 series.

- Maintenance-free, contamination-free - Long lifespan design - Compact size/high output design, no restrictions on installation direction - Compatible with wet gas and condensate gas - Well-balanced pressure reduction and pressurization characteristics - Variable flow rate (brushless motor) *Optional Basic flow rate: 5 l/min~ Achievable vacuum level: 230 mbar abs Maximum allowable discharge pressure: 3 bar (0.3 MPa)

  • Other pumps

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Related catalog(8)

KNF NMP850 Series Micro Diaphragm Gas Pump

KNF NMP850 Series Micro Diaphragm Gas Pump

PRODUCT
  • E-book viewing
  • Catalog download

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KNF NMP850 DC-BI HP Series Micro Diaphragm Gas Pump

KNF NMP850 DC-BI HP Series Micro Diaphragm Gas Pump

PRODUCT
  • E-book viewing
  • Catalog download

Contact this catalog

KNF NMP850 DC-BI Series Micro Diaphragm Gas Pump

KNF NMP850 DC-BI Series Micro Diaphragm Gas Pump

PRODUCT
  • E-book viewing
  • Catalog download

Contact this catalog

KNF NMP850HP Series Micro Diaphragm Gas Pump

KNF NMP850HP Series Micro Diaphragm Gas Pump

PRODUCT
  • E-book viewing
  • Catalog download

Contact this catalog

KNF NMP830 Series Micro Diaphragm Gas Pump

KNF NMP830 Series Micro Diaphragm Gas Pump

PRODUCT
  • E-book viewing
  • Catalog download

Contact this catalog

KNF NMP830 DC-BI HP Series Micro Diaphragm Gas Pump

KNF NMP830 DC-BI HP Series Micro Diaphragm Gas Pump

PRODUCT
  • E-book viewing
  • Catalog download

Contact this catalog

KNF NMP830 DC-BI Series Micro Diaphragm Gas Pump

KNF NMP830 DC-BI Series Micro Diaphragm Gas Pump

PRODUCT
  • E-book viewing
  • Catalog download

Contact this catalog

KNF NMP830HP Series Micro Diaphragm Gas Pump

KNF NMP830HP Series Micro Diaphragm Gas Pump

PRODUCT
  • E-book viewing
  • Catalog download

Contact this catalog

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Please take a look at the technical document for the leak test, the "Technical Manual"!

  • NEW
  • CATALOG

Fukuda Co., Ltd., which develops, manufactures, and sells leak testing equipment to inspect airtightness and sealing performance, provides a technical document that clearly explains the methods and theories of airtight testing, titled "Technical Manual." We are offering it as a PDF file. Please take this opportunity to download and view it!

Sep 30, 2026

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Please take a look at Fukuda's packaging container air leak test device!

  • NEW
  • PRODUCT

● What is a packaging container air leak test device? It is a leak testing device that identifies the peeling, tearing, and presence of pinholes in packaging containers for pharmaceuticals and other products, conducting a Container Closure Integrity Test (CCIT). It can be applied to a wide variety of packaging containers, including flexible packaging, bottle containers, and glass containers, primarily in pharmaceutical packaging. The measurement method employs the <sealed chamber method (pressure change leak testing method 1)>. A sample is placed in the chamber, and by applying pressure or vacuum and measuring the pressure change within the chamber, quantitative inspection is performed. It can be used in various scenarios, including offline manufacturing, inline manufacturing, CMC laboratories, quality control laboratories, and stability testing. * The containers subject to inspection are referred to as "work" or "samples." Here, specific samples are referred to as "samples" to differentiate the terminology.

Sep 30, 2026

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Please take a look at Fukuda's sealed product air leak testing device!

  • NEW
  • PRODUCT

What is a sealed product air leak test device? It is an air leak test device that inspects the airtightness, sealing performance, and waterproofness of electrical equipment and packaging containers (cosmetics, food). It tests for leaks in products such as smartphones, tablet devices, keyless switches, wristwatches, bottle containers, and cosmetic containers (eyeliner, mascara).

Sep 30, 2026

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■■ Leak test for pouch containers such as packed rice! | MSQ-2003 series ■■ Packaging container air leak test device, pinhole inspection device, and full inspection device.

  • NEW
  • PRODUCT

The pinhole inspection for packaging engineering is fully automated, eliminating packaging defects based on certain quality standards. The judgment results and operational status can be managed via a monitor screen. - Quantitative management of quality standards for the pinhole inspection process - Ensuring the quality of the product's shelf life - Establishing evaluation criteria for the manufacturing process, achieving quantitative quality assurance - Slim and space-saving design that can be connected to existing production lines - Quick changeover for product variety switching can be handled in a short time by exchanging chambers - Fully domestically produced, allowing for rapid maintenance and troubleshooting - Example target works: pillow packaging, packaged rice (packaged cooked rice), etc. *Please consult us regarding the use of this product for pharmaceuticals.

Sep 30, 2026

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Fukuda's leak test, leak inspection, leak detection, leak test, integrity test.

  • NEW
  • PRODUCT

Fukuda Co., Ltd. has been pursuing leak detection for 60 years and is committed to advancing the future of leak testing. 【 Supporting Various Leak Tests: Air Leak Test / Gas Leak Test (Hydrogen Gas, Helium Gas) 】 We develop, manufacture, and sell leak testing equipment to inspect airtightness and sealing properties. We will propose the appropriate testers and devices for each inspection target. 【 Target Industries and Examples of Inspection Targets 】 - Automotive Industry: Engines, FC components, valves and piping, various parts - Electronic Components Industry: Smartphones, keyless switches, various small sensors - Pharmaceuticals / Food / Cosmetics Industry: Bottle containers, syringes, vials, eye drop containers, pillow packaging, PTP packaging We will propose the most suitable leak testers for each industry. 【 ISO Certification 】JIS Q 9001:2015 (ISO 9001:2015)

Sep 30, 2026

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