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  1. Home
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  3. ケーエヌエフ・ジャパン KNF JAPAN
  4. Liquid transfer: direct liquid transfer and liquid level pressure transfer
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  • Dec 05, 2025
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Dec 05, 2025

Liquid transfer: direct liquid transfer and liquid level pressure transfer

ケーエヌエフ・ジャパン ケーエヌエフ・ジャパン KNF JAPAN
When there is a need to transfer liquids, two different approaches can be considered: direct liquid transfer and liquid transfer under pressure. What are the differences and potential limitations? When transferring liquids, engineers can choose to directly transfer fluids using liquid pumps. There is also a lesser-known method that utilizes the pressure difference created by a gas pump to indirectly transfer liquids. To select the best method for the application, it is important to understand the differences, advantages, and limitations of both transfer methods. If suction is required, the liquid vacuum method may be an option.
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FP1.7.jpg

KNF FP1.7 FP1.25 Pulsation Control Diaphragm Liquid Pump

Pulsation-reducing liquid pump, a high-output diaphragm liquid pump that significantly reduces pulsation generated during pump suction and discharge. Exhibiting at JASIS 2025.

We have reviewed the design of the pump itself as a liquid pump for pulsation reduction measures. Previously, pulsation reduction was achieved using dampers, but now the pump itself significantly suppresses pulsation. It features a high discharge specification. - FP1.7 Series / FP1.25 Series We have integrated the pulsation reduction damper with the pump. Two types are available: brushed DC motors and brushless DC motors. The brushless DC motor also allows for digital customization. We will be exhibiting at JASIS 2025, one of Asia's largest cutting-edge science and analysis systems & solutions exhibitions, where manufacturers of analytical and scientific instruments gather. Please visit our booth. We look forward to seeing you there. ■ Exhibition Name: JASIS 2025 ■ Date: September 3 (Wed) - 5 (Fri), 2025 (3 days) ■ Venue: Makuhari Messe International Exhibition Hall and Conference Center ■ Participation Fee: Free (Pre-registration required) ■ Booth Number: 6B-703

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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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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)

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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

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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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Related catalog(5)

KNF FP1.7 Pulsation-Damping Liquid Pump High Discharge Type

KNF FP1.7 Pulsation-Damping Liquid Pump High Discharge Type

PRODUCT
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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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ケーエヌエフ・ジャパン
Machine elements and parts
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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.

Dec 08, 2025

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Notice Regarding Year-End and New Year Holidays

  • NEW
  • COMPANY

We will be closed from December 27, 2025, to January 4, 2026. Inquiries during this period will be addressed sequentially after January 5. We apologize for the inconvenience and appreciate your understanding.

Dec 08, 2025

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Notice of Year-End and New Year Holidays

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  • OTHER

Thank you very much for your continued support. We, at Marpos Co., Ltd., will be closed during the following period: Closure Period: From Saturday, December 27, 2025, to Sunday, January 4, 2026. Inquiries received during the closure period will be answered sequentially after the start of business in the new year. We apologize for any inconvenience this may cause and appreciate your understanding. Sincerely,

Dec 08, 2025

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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)

Dec 08, 2025

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■■ Air Leak Tester | FLA-0200 / FLA-0201 series ■■ Fukuda's new flagship model. Equipped with mastering correction function, it enables high-precision measurements in a short time.

  • NEW
  • PRODUCT

Fukuda's new flagship model. - Masterless type (FLA-0200 series) - General type (FLA-0201 series) Two models of air leak testers. With the mastering correction function, high-precision measurements can be achieved in a short time. Please take a look at the catalog.

Dec 08, 2025

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