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Specialized Tools for Electrophysiology and Cell Biology Research

(FR-50, FR-55S) Flow Valves - Vacuum/Solution

Product Summary

Provides robust fine control of solutions in a gravity fed perfusion system, or for vacuum control in other applications.


  • Reproducible settings
  • Mates with standard PE-160 tubing
  • Available with on/off switch

The FR-50 / FR-55S is a convenient tool to adjust both solution flow rates or vacuum pressure in a variety of applications.

Solution flow is adjustable from zero to maximum (nominally 10 ml/min measured with a solution head of 30 cm), and both units have calibrated adjustment rings to faclitate returning to a predetermined setting.

The FR-55S includes a convenient on-off switch for interrupting the flow without disturbing any set settings.

Both holders are compatible with our In-line Solution Heater Holders which can provide a secure footing for either the FR-55 or FR-55S.

The FR-50 and FR-55S couple directly to standard PE-160 tubing.

Materials PTFE and Delrin
Input/Output Stainless Steel Tubing compatible with PE-160 Tubing



  1. F-series prostaglandin function as sex pheromones in the Korean salamander, Hynobius leechii
    Eom J, Jung YR, Park D
    Comp Biochem Physiol A Mol Integr Physiol. 2009 Sep;154(1):61-9. Epub 2009 May 18
  2. Paired Assessment of Volatile Anesthetic Concentrations with Synaptic Actions Recorded In Vitro
    McDougall SJ, Peters JH, LaBrant L, Wang X, Koop DR, Andresen MC
    PLoS One. 2008 Oct 8;3(10):e3372
  3. Differential Effects of Serotonin and Dopamine on Human 5-HT3A Receptor Kinetics: Interpretation within an Allosteric Kinetic Model
    Solt K, Ruesch D, Forman SA, Davies PA, Raines DE
    J Neurosci. 2007 Nov 28;27(48):13151-60

Customers from Europe and Australia can use the Multi Channel Systems - Online Shop to order Warner products or create quotes.

Order No. Model No. Product Description USA Price Order
64-0220 FR-50 Flow regulating valve Login Login
64-0221 FR-55S Flow regulating valve, with on/off switch Login Login
Accessories and Replacement Parts
64-0755 PE-160/10 Polyethylene tubing, PE-160, 10 ft Login Login
64-0756 PE-160/100 Polyethylene tubing, PE-160, 100 ft Login Login

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