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Jerguson ® Level Gages

JergusonOne of the simplest techniques for indicating liquid level is by means of a direct reading device with which the level can be seen visually. A common method of providing such visual indication is by installing direct reading gages in the vessel itself. These direct reading gages are placed at different locations or points to indicate the liquid height. More often, separately mounted gage glasses are used to provide a continuous indication of level over a certain vertical distance on the vessel.

The transparent glass gage consists of a one piece central chamber with cover plates oneach side that hold the two glass windows. The chamber and cover plates have machined recesses that keep all the parts aligned and prevent the gaskets and cushions from shifting. When the level of caustic or acidic fluids is indicated, the inside surfaces of both glasses are lined with a protective coating of transparent mica. After prolonged exposure to high temperature, chemically-treated water, the mica will become opaque. This discoloration indicates that the mica has failed and water is now in direct contact with the glass. When this happens, the glass should be changed, before it fails. See Glass Example

The glass itself is also tempered for resistance to both mechanical and thermal shock. Care must be taken when assembling the unit and tightening the bolts to prevent glass failure. It is safest to use the crossover method of tightening by starting at the center and working outwards.

Besides being suitable for caustic and acidic liquids, the flat glass is also suitable for dirty materials, high pressure steam applications and other service where it is necessary to illuminate the glass from the rear.

The reflex gage is best suited for clean, colorless, non-viscous, and non-corrosive fluids including light and heavy hydrocarbons. This gage has special optical properties that create a sharp line of demarcation at the liquid level. A dark area represents the liquid in the glass gage contrasted by a light area above the liquid.  Our Gage & Valve Selector Slide Rule is shown to the right (can't get that from the competition !)

Select a Pressure Range and Series (Model):
 
Jerguson Level Gauges
Low Pressure Jerguson ® Series 300L is 300# ANSI Rated SEE PAGE
Standard construction includes a solid one-piece chamber machined from bar, bar stock covers, tempered glass, steel bolts and nuts.  Series 300L gages are available with carbon steel or stainless steel chambers.  The Series 300L replaces the old Series 12 which replaced the old Series 5 gages.  One of the simplest techniques for indicating liquid level is by means of a direct reading device with which the level can be seen visually.
   
Jerguson level gage
Large Chamber Jerguson ® Series L10 for Boiling Liquids SEE PAGE
These gages are designed to give an accurate liquid level reading of liquids that have a tendency to surge or boil. These gages are highly effective in (1) reducing the boiling effects of entrained gas being released under lowered pressure, (2) the liquid itself being vaporized when pressure reaches a critical low point, and (3) boiling caused by temperatures exceeding the boiling point of the liquid.  When the liquid being gaged has an unusually low boiling point the gage and valves should be installed and the gage equipped with a non-frosting unit.
   
Jerguson Gage
Medium Pressure Jerguson ® Series 20 for Pressures Up To 3270PSI @ 100ºF SEE PAGE
Standard construction (for Series 20 Gage) includes a one-piece chamber machined from bar, forged steel covers,tempered glass, alloy steel bolts and nuts. Select reflex glass (prismatic) Style Glass or transparent (clear) glass gage. The recessed gasket seats aid in positioning and retaining the gasket. (FM Approved - See FM Certificate)
   
Jerguson Series 32 Gage
High Pressure Jerguson ® Series 32 for Pressures up to 4000psi @ 100ºF SEE PAGE
Standard construction (for the Series 32 Gage) includes a solid one-piece chamber machined from bar, steel covers, tempered glass, alloy steel bolts and nuts. Select reflex gage (prismatic) Style Glass or transparent glass gage. Recessed gasket seats prevent gasket movement. Series 32 gages are available in a variety of materials to meet specific corrosive conditions.
   
Jerguson Gage
High Pressure Jerguson ® Series 40 for Pressures Up To 5000 psi @ 100°F SEE PAGE
Heavy-duty high pressure Series 40 Jerguson Gages are available in both reflex and transparent (shown above) types. (Reflex gages assembled with a single plain glass for greater strength.) These gages are designed and manufactured to the highest industry standards. Their dependability under difficult high pressure operating conditions is well known in the process industries
   
Jerguson Gage
High Pressure Jerguson ® Series 51 SEE PAGE
Offset union bonnet with a renewable seat and forged body (Carbon Steel & 316SS). 3/4" screwed inlet by 3/4" tubular glass by 1/2"drain. Ballcheck of stainless steel shut-off flow in event of tube breakage. Stainless steel trim. Offset bodies permit the swabbing of glass by removing plugs from vent and drain.