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Armored Gauges Available Also!
Click here for details |
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Clark Reliance boiler trim and water columns |
What is a water
gauge?
A
water gauge is a device that allows the liquid
level in a vessel to be visually inspected.
Water gauges are required by the ASME Boiler and
Pressure Code on steam boilers, and are also
useful in many other applications, such as
monitoring the amount of oil in an oil tank.
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Things to remember...
Care must be given to ensure the proper
selection of a water gauge. Special
attention must be given to temperature/pressure
requirements and to the service media (water,
steam, oils, chemical agents, etc.). Some
items to keep in mind include: |
- Pressure
Ratings may be influenced by limitations of
the valve body, gage glass, & gage glass
gasket. As temperatures increase, pressure
ratings decrease. The larger the glass diameter
and the longer the glass length, the lower the
pressure rating.
- Temperature Ratings may also be
influenced by limitations of the valve body,
gage glass, and gage glass gasket.
- Use Guard Rods and Tubular Gage
Glass Protectors to help protect glass from
accidental breakage. Some applications require
glass protectors.
- Use Redline Gage Glass where pressures
permit to allow for easy reading of the gauge.
Use large diameter (3/4") glass for increased
visibility.
- Use Automatic Ball Checks to help
minimize the risk of property damage or personal
injury. Vertically rising automatic ball checks
conforming to ASME requirements are available.
- Boilers operating above 400 psig require two
water gauges.
- All water gauges on all steam boilers must be
1/2" NPT or larger.
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Safeguard Armored Tubular Level Gauge |
 Safeguard
Armored Tubular Liquid Level Gauge
Available in all Carbon Steel, all Stainless
Steel, or Carbon Steel with Stainless Steel
wetted parts.
Lengths up to 10 feet.
As low as 1/10th the cost of armored flat glass
gauges. |
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20-200 & 20-250 Series
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 Heavy Pattern
Bronze Water Gauges
All standard 20 Series features but with a heavier valve body pattern for higher service ratings.
Available with 3/8, 1/2, and 3/4 male NPT fittings
Ball checks standard on 20-250 models
Polished finish on 25-200 valves
Rated: 200 psig @ 400°F, 400 psig @ 100°F |
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20-300 & 20-350 Series
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 Square Pattern
Bronze Water Gauges
Available with 1/2" (ASTM B-16 brass bar stock) or 3/4" (B-584 cast bronze) 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 standard on 20-350
Rated: 200 psig @ 400°F, 400 psig @ 100°F |
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20-400 Series
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 Side Mounted Handwheel
Water Gauges
Side-mounted handwheels allow water gauge operation in hard to reach places; with all the 20 Series design features.
Ideal forconcealed jacketed type boilers
Brackets and guard rods standard: 20-407, 20-408
EPDM standard gauge glass gaskets Compact requires minimum space Rated: 125 psig @ 350°F, 300 psig @ 100°F |
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24-600 & 24-650 Series
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 Chain Lever
Water Gauges
Lever 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 psig @ 400°F, 500 psig @ 100°F
Use on large boilers with inconvenient columns
Automatic and non-automatic models Furnished with 12 feet of chain |
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20-800 Series
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 Bronze Expansion
Tank Gauges
Use for all types of liquid level verification; available with 3/8" or 1/2" NPT male pipe connections. Aluminum or plastic composition hand wheels; EPDM gauge glass gaskets standard.
Ball checks standard for 20-800 models. Equipped with two brass guard rods.
Rated: 125 psig @ 350° F, 300 psig @ 100°F |
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20-700 & 20-710 Series
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 Bronze Expansion
Tank Gauges
Available with 3/8" or 1/2½", male NPT connections; EPDM gauge glass gaskets and ¼1/4" needle drain valve in lower arm are both standard.
20-710 has plug in top arm to insert
glass straight through 1/4" pet cock or Apollo
ball valve. Rated: 125 @ 350°F, 300 psig @ 100°F |
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23-600 Series
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 Stainless Steel
Expansion Tank Gauges
Holds all 316 stainless steel-compatible liquids. In lower arm shut-off valve and stainless steel drain valve.
250 psig @ 406°F: maximum working pressure
Two stainless steel guard rods
High pressure glass standard |
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24-300 Series
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 Bronze Liquid
Level Gauges
Automatic and non-automatic direct reading gauges in shank pipe sizes 1/2" and 1/4".
Heavy pattern bronze valve body
Guard rod bracket to accommodate four guard rods Drain valve - 5/16 diameter full-blow ball valve with safety handle PTFE reinforced gauge glass gasket and stem packing are standard High pressure gauge glass gaskets are standard Automatic- conforms to ASME power boiler code requirements for automatic water gauges - ball checks in upper and lower arms Rated: 500 psig @ 100°F, 250 psig @ 400°F |
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23-400 & 23-450 Series
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 Stainless Steel Liquid
Level Gauges
Ideal for handling alcohol solvents, acetic acid and ketones. Automatic models conform to ASME requirements; aluminum and composition handwheels.
PTFE reinforced gauge glass, stem packings
Chemical resistant PTFE seat
5/16" dia. Full flow all SS drain valve with safety handle
Guard rod bracket to accommodate four SS guard rods
Rated: 500 psig @ 450°F
High pressure gauge glass standard |
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Gauge Glass Protector
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 Reduces risk of injury and damage from broken exploding glass; maximum length: 50".
No. I-2733* 5/8" Glass Protector
No. I-2734* 3/4" Glass Protector
Made to fit most water gauges
Not available on 23-400, 23-650, 24-300; 24-600 models
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for
your boiler and water gauges
