Home Doughton Mfg. Company
Over 50 Years in the Lubrication Equipment Business
1-800-783-3621

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Shut Off Valves

Steel Tubing & Fittings
The Most Inexpensive System Based on Time, Labor & Material

Features

  • No random Lengths
  • Uniform 25' Pieces, Available in protective cartons
  • Same or next day shipment on most orders
  • Fittings available that will fit both High & Low pressure tubing Completely reusable and easy to assemble
  • Accessories:
    • Reducing adapters
    • Low medium & high pressure shut off valve
    • Tube benders
    • Deburring tools
  • Single source of supply

Tubing is available in the following sizes and wall thickness

High Pressure
Tube Size & Wall
Working Pressure
5/8" 0.083
8100 PSI
3/4" 0.095
7700 PSI
7/8" 0.109
7500 PSI
1" 0.120
7250 PSI

Low Pressure
Tube Size & Wall
Working Pressure
5/8 0.035
2500 PSI
3/4 0.035
2100 PSI
7/8 0.049
2200 PSI
1" 0.049
2200 PSI

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O-Ring Seal Tube Fitting

The Lenz O-Ring Seal Tube Fitting that actually "Thinks for itself"

It is as though the fitting has a built-in brain or computer that tells it to seal tighter under pressure, reverses it's seal under vacuum, and continues to seal at zero pressure since the elastometric o-ring has a capacity for remembering it's original shape.

The O-ring is the simplest, most ingenious, and effective way of sealing.

The Locking nut and tapered ring holding the tubing works in much the same manner as the o-ring, holding the tube tighter under pressure -in effect making a "mechanical weld."



O-Ring Seal Fittings Are Assembled As Easy As A-B-C!

  • The Only Tube Fitting of Their Kind
  • Why They Are Exclusively Different
  • How They Save You Time and Cost
  • How They Perform
  • How to Assemble
How To Split Ring Grips
Note the taper. As nut is tightened the ring is wrapped around the tube, gripping it in like manner to a locking collet in a chuck. This principle grips and locks tighter and stronger as the pressure increases. Note that the nut has nothing to do with the seal...It is separate!

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