1. The two spring balance safety valves were located on the outer firebox. 2. The earliest types employed a simple spring balance attached to a pivoted bar. 3. It will be replaced by electronic and spring balances . 4. On the foremost boiler section was the steam dome with a safety valve and spring balances . 5. Brockway-Smith makes spiral spring balances , and you could order new ones through your local lumber dealer. 6. In your case the spring balances failed, perhaps because they were not strong enough or were defective. 7. Spring balances come in different sizes.8. Some double-hung windows may have tubular-type spring balance or a spring-tape balance mechanisms to control the sash movement. 9. With a boiler pressure of, these were the first South African engines to use Salter spring balance valves. 10. The two spring balance safety valves were located on the steam dome and dome of the outer firebox.
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