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Lohms represent resistance in a fluid system.
Lohm is a measure of resistance to flow. The higher the Lohm rate, the more restrictive the flow. The maximum Lohm rating of the part is your flow criteria for the part.
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Xover® 2- & 3-Way Isolation Solenoid Valve
Our newest pinch-tube valve features either a single-channel (2-way) or Y-shaped (3-way) elastomer tube, enabling fast, efficient fluid flushing and laminar flow.
Key Product Facts
  • Ultra-Low Carryover Volume: As low as 3.7 µL
  • Zero Dead Volume & Low Internal Volume: As low as 11 µL
  • Laminar Flow Path
  • Lohm Rate: 1000 & 3800 Lohms (Cv = 0.005 - 0.02)
  • Operating Pressure: Vacuum – 30 psig
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LSP Series 2-Way Isolation Solenoid Valve
This high flow, chemically inert pinch-tube valve enables excellent flushing and boasts only one wetted material; ideal for drain or waste lines in medical and analytical instruments.
Key Product Facts
  • Single Wetted Material: FKM
  • Zero Dead Volume & Low Internal Volume
  • Manifold Mounted
  • Lohm Rate: 330 Lohms (Cv = 0.06)
  • Operating Pressure: 15 psig
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LFR Series 3-Way Isolation Solenoid Valve
This 13 mm, high flow, chemically inert diaphragm valve controls aggressive fluids in diagnostics and analytical applications.
Key Product Facts
  • Inert Seal Material Options: FKM, EPDM, & FFKM
  • High Flow: Great for waste line applications
  • Long Cycle Life: 10 M cycles min
  • Lohm Rate: 700 & 1000 Lohms (Cv = 0.029 & 0.020)
  • Operating Pressure: Vacuum – 30 psig
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LFY Series 2- & 3-Way Isolation Solenoid Valve
This chemically inert pinch-tube valve has zero dead volume; great for flushing aggressive fluids in medical and scientific applications.
Key Product Facts
  • Inert Tube Material Options: FFKM & FKM
  • Zero Dead Volume
  • Low Internal Volume: 54 – 72 µL
  • Lohm Rate: 1000 Lohms (Cv = 0.02)
  • Operating Pressure: 15 psig
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LFV Series 2-Way Isolation Solenoid Valve
This 13 mm, chemically inert diaphragm valve controls aggressive fluids with extreme reliability in challenging diagnostics and analytical applications.
Key Product Facts
  • Inert Seal Material Options: FKM, EPDM, & FFKM
  • Low Internal Volume: As low as 11 µL
  • Long Cycle Life: 10 M cycles minimum
  • Lohm Rate: 1000 – 2000 Lohms (Cv = 0.020 – 0.010)
  • Operating Pressure: Vacuum – 30 psig
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LFN Series 2-Way Isolation Solenoid Valve
This small (7 mm), chemically inert, diaphragm valve controls aggressive fluids in tight spaces and offers zero dead volume, low internal volume, and low power.
Key Product Facts
  • Zero Dead Volume & Low Internal Volume: 9 µL
  • Low Power: 900 mW
  • Lightweight: 6 grams
  • Lohm Rate: 2500 Lohms (Cv = 0.008)
  • Operating Pressure: Vacuum – 30 psig
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