US Divers Steel Scuba Cylinder with J-Valves
Overview of Vintage US Divers Steel Scuba Cylinder with J-Valve
US Divers Co., a prominent name in mid-20th-century diving equipment, produced steel scuba tanks often paired with J-valves and backplates. These setups were standard before the widespread adoption of submersible pressure gauges (SPGs).
J-Valve Functionality
The J-valve was a safety feature designed to provide a reserve air supply. When the tank’s pressure dropped to a predetermined level (typically around 300–500 psi), the valve would restrict airflow, signaling the diver to ascend. Pulling the reserve lever would then restore full airflow, granting access to the remaining air .
Tank Specifications
Vintage US Divers steel tanks commonly had the following characteristics:
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Capacity: Approximately 72 cubic feet
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Working Pressure: Rated at 1800 psi
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Dimensions: Around 24 inches in height with a 7-inch diameter
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Design Features: Often featured a round bottom and were painted yellow for visibility .
Backplate and Harness System
These tanks were typically mounted using a metal backplate with adjustable harness straps, allowing divers to carry the tank securely on their backs. This setup was standard before the development of modern buoyancy compensators.
Collecting and Purchasing Vintage Equipment
For enthusiasts and collectors interested in vintage scuba gear:
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eBay frequently lists vintage US Divers tanks and components. For instance, a 1960 US Divers J-valve (Model J-60) was recently available for display purposes .
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ScubaBoard hosts discussions and classifieds where members share information and sell vintage diving equipment .
If you’re considering acquiring such equipment for diving purposes, ensure it undergoes proper inspection and testing by certified professionals, as vintage gear may not meet current safety standards. For display or collection, these pieces offer a fascinating glimpse into the history of scuba diving.
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