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Solenoid Valves

LFN Series 2-Way Isolation Solenoid Valve

This small (7 mm), 2/2, normally closed, bidirectional, low power valve features a media-separating diaphragm and chemically inert materials. It offers minimal internal volume, zero dead volume, fast response times, and excellent flushing to reduce reagent consumption. It is ideal for diagnostics and a variety of other medical and scientific applications, particularly when multiple valves are needed in extremely tight spaces. Each valve is customizable (higher pressure, etc.) and 100% tested to ensure performance.

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Key Product Facts
  • Zero Dead Volume & Low Internal Volume:9 µL
  • Low Power:900 mW
  • Lightweight:6 grams
  • Lohm Rate:3450 & 4050 Lohms (Cv = 0.005 - 0.006)
  • Operating Pressure:Vacuum – 30 psig

Product Information

General Specifications
Characteristic Specification
Operating Pressure Vac - 30 psig
Cycle Life1 10 M Cycles Min
Recommended Filtration 35 Microns or Finer
Response Time <5ms (Application Dependent)
20 ms Max2
Operating Temperature EPDM: 30°F to 120°F (-1°C to 49°C)
FKM & FFKM: 40°F to 120°F (4°C to 49°C)
Max Coil Temperature3 170°F (77°C)
Storage Conditions Temperature: -40°F to 175°F (-40°C to 80°C)
Relative Humidity: 85% Max, Non-Condensing
Weight 6 grams
Internal Volume 9 µl
Configuration Flange Mount
1Typical cycle life on water; actual cycle life will vary depending on application conditions.
2Typical response time based on air flow at 10 psig, 2 Hz, 68°F. Response times are application dependent and can be enhanced with the use of high speed drive circuits.
3To ensure solenoid coil temperatures remain within specification, duty cycle limitations may be required. Contact The Lee Company for recommendations specific to your application.
WETTED MATERIALS
Component Material
Port Head PEEK
Diaphragm Seal and Gasket FKM, EPDM or FFKM
Flow Curve
*Lohm rating of each valve model is based on air performance. Curves shown above depict empirical data from actual product performance on water.
Cross Section View
Flange Mount Configuration
Dimensional View
Flange Mount Configuration
This image is for reference only. All dimensions are in inches [millimeters].
Mounting Details
Flange Mount Configuration
This image is for reference only. All dimensions are in inches [millimeters].
Reference drawing number LSIX1001800A for complete specifications.

Part Numbers & Specifications

This table below contains the part numbers and technical specifications for this product. If you have specific questions, need a quote, or would like to request a handbook or drawing, click the red request button in the column on the far right.

Part Numbers & Specifications
PART NUMBER VOLTAGE (Vdc) OPERATING PRESSURE (PSIG) LOHM RATE1 (Cv) POWER CONSUMPTION (mW) SEAL MATERIAL Request Information
LFNA1250125H 12 Vacuum - 30 3450 Lohms (0.006) 900 FKM Request
LFNA2450125H 24 Vacuum - 30 3450 Lohms (0.006) 900 FKM Request
LFNA1250225H 12 Vacuum - 30 3450 Lohms (0.006) 900 EPDM Request
LFNA2450225H 24 Vacuum - 30 3450 Lohms (0.006) 900 EPDM Request
LFNA1250427H 12 Vacuum - 30 4050 Lohms (0.005) 900 FFKM Request
LFNA2450427H 24 Vacuum - 30 4050 Lohms (0.005) 900 FFKM Request
1Maximum Lohm rate on air. Reference the flow curve under the product information tab for typical flow characteristics on water.

Installation & Accessories

Accessories View
One LFN valve is shown installed onto the LSMX0509700B single-place manifold. Please note the valve is not included in the purchase of this standard manifold.
Replacement Parts & Accessories
PART NUMBER DESCRIPTION
LSWX0503110A Mounting Screw (#1-64 x 0.1875")
LSWX0508170A Gasket (EPDM)
LSWX0508200A Gasket (FKM)
LSWX0508290A Gasket (FFKM)
LSWX0609060A Lead Wire Connector, 6" Long
LSMX0509700B* Manifold, 1x, PEEK
LSMX0509520B* Manifold, 2x, PEEK
LSMX0509530B* Manifold, 3x, PEEK
LSMX0509540B* Manifold, 4x, PEEK
LSMX0509550B* Manifold, 5x, PEEK
Several standard manifolds are available to ease prototype setup, including single valve (1x) manifolds through five (5x) valve positions per manifold. Manifold part numbers include the manifold and mounting screws only. All solenoid valves are sold separately. Alternate materials and customized manifold designs are available upon request.
*Manifold has a shared header line which interconnects one port of each valve. There is an individual 062 Minstac connection to the second port of each valve. PMMA versions of these manifolds are not listed but are also readily available.

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The Lee Company has developed the Lohm Laws for defining and measuring resistance to fluid flow. The Lohm is defined such that 1 Lohm will flow 100 GPM of water with a pressure drop of 25 psi at a temperature of 80°F.

Lohms for Liquids Lohms for Gases