When two or more boilers provide steam flow...

Question 1 of 270705eccef9bbacbc34ba4d45655

When two or more boilers provide steam flow to a common main steam line, each boiler main steam line shall be fitted with a main steam stop valve and a/an __________.

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Question 1 of 27070

When two or more boilers provide steam flow to a common main steam line, each boiler main steam line shall be fitted with a main steam stop valve and a/an __________.

🔍 Key Concepts

• Steam distribution from multiple boilers to a common main • Purpose and function of a main steam stop valve versus other valves in the line • How to prevent reverse flow or boiler-to-boiler flow when several boilers share a header

💭 Think About

• Think about what could happen if one boiler is secured while the others are still online—what protects the idle boiler from pressure coming back through its line? • Which of these valve types can both be used as an isolating valve and provide automatic protection against backflow, especially during startup and shutdown? • Which option is specifically designed for high‑pressure steam service on boiler outlets in a multi‑boiler configuration?

✅ Before You Answer

• Verify which valve type combines features of a stop (shutoff) valve and a check (non‑return) valve in one body. • Confirm which valve is commonly installed on each boiler outlet to prevent reverse flow into an idle or lower‑pressure boiler. • Eliminate fittings that are primarily used as simple on/off isolation valves without automatic non‑return / backflow capability.