Remote valve operators are frequently fitted...

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Question 1 of 2066636eee28f7522a1c51f201

Remote valve operators are frequently fitted with a handwheel for local operation if the motor fails. If this is so, what is the procedure for local manual control?

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Question 1 of 20

66636eee28f7522a1c51f201

Remote valve operators are frequently fitted with a handwheel for local operation if the motor fails. If this is so, what is the procedure for local manual control?

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🔍 Key Concepts

• Motor-operated valves and how they can be operated if electrical power or the motor fails • Purpose of a clutch or disengaging mechanism between motor and valve stem • Risk of back-driving or damaging the motor/gearing when operating by hand

💭 Think About

• Think about what could happen inside the mechanism if you turn the handwheel while the motor is still solidly connected to the valve stem. • Ask yourself: is there usually a way to separate the motor from the valve stem before manual operation, or do we want them coupled together? • Which option best protects the motor and gear train from damage when operating the valve locally by hand?

✅ Before You Answer

• Check whether local handwheels are in fact commonly provided on remote motor-operated valves. • Consider whether a clutch or lever is usually moved to change from motor to manual mode. • Verify which position of that clutch/lever (engaged vs. disengaged) makes sense before using the handwheel.

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Question 1 of 2066636eee28f7522a1c51f201

Remote valve operators are frequently fitted with a handwheel for local operation if the motor fails. If this is so, what is the procedure for local manual control?

Back

Question 1 of 20

66636eee28f7522a1c51f201

Remote valve operators are frequently fitted with a handwheel for local operation if the motor fails. If this is so, what is the procedure for local manual control?

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

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