Tubular Gauge Glass

Borosilicate tubular gauge glass is available in three service grades and in any diameter or length needed. All tubular glass is cut to length to your specification. Sealpro stocks each grade in 1/2", 5/8" and 3/4" outside diameters.

____Clear & Red LineRed ______________________Line Heavy Wall_________________

All glass tube's internal pressure exert a bending force on the tube and therefore, the longer the tube the higher the likelihood of breakage due to this bending. Also, where corrosive material such as steam is in the tube, the wear on the tube further weakens its resistance to pressure. Red Line Heavy Wall is recommended for steam service.

Table of Contents

 

Flat Gauge Glass

These glasses are designed for use in armored-type liquid level gauges. They are manufactured of borosilicate glass under carefully controlled conditions to provide a high-strength tempered glass with the greatest degree of visibility. The three basic gauge glass types available are noted below:

• Type A, Plain is designed for moderate-pressure steam boilers and for liquid level indicators.

• Type A, High Pressure will take non-steam pressure up to 5000 psi.

• Type B, Reflex is made for extra ease in locating liquid levels. This gauge glass has vertical prisms extending the full viewing length of the glass. The prism side faces the liquid. The sections of the prisms not covered with liquid reflect light brilliantly. Thus the liquid level stands out extra clearly from a great distance away.

Corrosives:

The borosilicate glass used to manufacture these products is outstanding for chemical services. Certain limitations, however must be recognized.

Some materials reduce the useful life of the gauge glass by chemical action: e.g. hydrofluoric acid (HF); hot concentrated phosphoric acid; sodium and potassium hydroxides above 125° F; steam or superheated water above 250° F. Except for HF, protection from reagents such as these may be supplied by using a mica shield to cover the glass. Reflex glasses cannot be shielded.

NOTE: When these protective coverings wear out, the entire assembly should be replaced.

Alkaline solutions attack glass very slowly at room temperatures, but as temperature is increased over 100°F, the corrosion rate rises rapidly.

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____Type A Plain __Type A HP__Type B Reflex ___________Mica Shield_________

Glass Gaskets, Washers & Friction Rings

BUTLER BEVEL GAUGE GLASS SEAL

A Premium gasket for steam / water service. Prevents cloudiness and errosion of OD of gauge glass due to steam leakage by-passing top seal. Selected sizes available.

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Water Gauges

Chain Lever Water Gauges

Chain Lever Water GaugesLever on standard 12 foot chain allows operator to open and close valves that would be beyond reach. Valve stems operate on quarter turns.

• Rated 250 PSI @ 400°F and 500 PSI @500°F

For 1/2" pipe use 5/8" OD glass x 12" long

For 3/4" pipe use 3/4" OD glass x 16" long

Note: Service ratings are subject to pressure/temperature ratings of gauge glass.

• Use on large boilers with inconvenient columns.

• Automatic and manual models.

• Furnished with 12 feet of chain.

Square Pattern Water Gauges

Available with 1/2" (ASTM B-16 brass bar stock) or 3/4" (B-584 cast brass) NPT male pipe connections. Four guard rods and EPDM gauge glass gaskets standard. Other Packings available.

• Standard 1/4" needle drain valve in lower arm.

• Pet cock or Apollo© ball valve drain on request.

• Ball checks and polished finish standard on some items.

• Rated 200 PSI @ 400°F, 400 PSI @ 100°F.

Note: Service ratings are subject to pressure/temperature ratings of gauge glass.

Chain Operated

Gauge Cock

......For use on water columns beyond reach from the floor.

• Spring loaded lever• Teflon® seat• Optional 6' chain• Rated to 250PSI

Compression

Gauge Cock

........For draining expansion tanks, other liquid storage vessels.

• Rated up to 125 PSI • Soft metal seat/ stuffing box• Stainless steel ball seat/ stuffing box