What type of valve would be fitted with a...

Question 1 / 270705eccef9bbacbc34ba4d453d3

Question 1 of 270705eccef9bbacbc34ba4d453d3

What type of valve would be fitted with a quarter-turn power actuator, such as a rack-and-pinion?

Question 1 of 27070

What type of valve would be fitted with a quarter-turn power actuator, such as a rack-and-pinion?

🔍 Key Concepts

• Difference between linear-motion valves (gate, globe) and rotary-motion valves (butterfly, ball, plug) • What a quarter-turn actuator actually does in terms of valve stem rotation • Typical valves used for quick remote shutoff with power actuators on ships

💭 Think About

• Which of these valve types is fully opened or closed by turning the stem only about 90 degrees? • Which valves use a stem that moves up and down (linear travel) rather than rotating only? • On a ship, when you see a rack-and-pinion actuator, what style of valve disc or closure member is it usually turning?

✅ Before You Answer

• Identify which options are multi-turn linear valves versus quarter-turn rotary valves • Ask yourself: does this valve type normally show the stem rising or not when operated by handwheel? How does that relate to a power actuator? • Confirm which valve type is commonly paired with rack-and-pinion or pneumatic actuators for fast operation

Question 1 of 27070

What type of valve would be fitted with a quarter-turn power actuator, such as a rack-and-pinion?

Rising stem gate valve

Butterfly valve

Non-rising stem gate valve

Globe valve