A non-rising stem gate valve should...

Question 1 / 205eccef9bbacbc34ba4d4538f

Question 1 of 205eccef9bbacbc34ba4d4538f

A non-rising stem gate valve should __________.

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Question 1 of 20

5eccef9bbacbc34ba4d4538f

A non-rising stem gate valve should __________.

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🔍 Key Concepts

• Non-rising stem gate valve construction and how the disk moves when the stem turns • Why operators sometimes "back off" slightly after fully opening a valve • The difference between ensuring full flow and preventing the stem from jamming or seizing

💭 Think About

• Think about what happens inside the valve body when the stem stops moving upward but the hand wheel keeps turning a bit more. • Consider how thermal expansion or corrosion could affect a stem that is left hard against its mechanical stop. • Ask yourself which option best balances getting full open flow while still allowing the stem and gate to move freely later.

✅ Before You Answer

• Verify which choice avoids leaving the stem jammed or bound at the end of its travel. • Check which option would make it easier to close the valve later, even if it is hot or slightly corroded. • Eliminate any choice that could place unnecessary stress on the stem threads or gate when the valve is fully opened.

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Question 1 of 20

A non-rising stem gate valve should __________.

be completely opened with the hand wheel locked hard at the end of the last opening turn

be opened to the end of the last opening turn, then rotate the hand wheel in the closing direction by approximately 1/4 of a turn

be opened by 1/2 of the total number of turns available from full closed to full open

be opened as much as needed, regardless of how little the gate has been moved from its seat

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Question 1 / 205eccef9bbacbc34ba4d4538f

Question 1 of 205eccef9bbacbc34ba4d4538f

A non-rising stem gate valve should __________.

Back

Question 1 of 20

5eccef9bbacbc34ba4d4538f

A non-rising stem gate valve should __________.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed