If it is necessary to increase the operating...

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Question 1 of 2066636eee28f7522a1c51ee0a

If it is necessary to increase the operating head pressure of the refrigeration system using the device shown in the illustration, what should be done? Illustration RA-0014

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Question 1 of 20

66636eee28f7522a1c51ee0a

If it is necessary to increase the operating head pressure of the refrigeration system using the device shown in the illustration, what should be done? Illustration RA-0014

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🔍 Key Concepts

• This is a condenser water-regulating valve for a refrigeration system that uses spring force vs. bellows force to control water flow and head pressure. • Increasing operating head pressure means the refrigerant pressure must get higher before the valve opens to allow more cooling water. • Part "2" adjusts the spring compression, while part "4" encloses the pressure-actuated bellows that reacts to condenser pressure.

💭 Think About

• Ask yourself: to make the system run at a higher head pressure, should the valve open sooner or later as pressure rises? • Which adjustment—changing the spring setting at "2" or mechanically affecting the bellows at "4"—would change the pressure at which the valve starts to open? • If the bellows force represents refrigerant pressure pushing the valve open, does increasing or decreasing spring compression make it harder for the bellows to move the valve?

✅ Before You Answer

• Be clear that higher operating head pressure = valve stays more closed until a higher pressure is reached. • Identify which part in the illustration is clearly drawn as an adjustment screw for spring tension (look at the threads and locknut). • Verify that the bellows at "4" is a sensing element, not normally something you adjust directly in service to change the set pressure.

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Question 1 of 2066636eee28f7522a1c51ee0a

If it is necessary to increase the operating head pressure of the refrigeration system using the device shown in the illustration, what should be done? Illustration RA-0014

Back

Question 1 of 20

66636eee28f7522a1c51ee0a

If it is necessary to increase the operating head pressure of the refrigeration system using the device shown in the illustration, what should be done? Illustration RA-0014

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

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