In a reciprocating pump, air vessels are used to

🔑 Key Points
→ The air vessel in a reciprocating pump is a cast iron closed chamber with an opening at its base.
→ It is fitted to the suction and delivery pipes near the cylinder of the pump.
→ The vessel helps achieve a continuous supply of liquid at a uniform rate and reduces power required to drive the pump.

📌 Important Points
→ The use of an air vessel reduces acceleration and friction heads, thereby reducing the work needed and power consumption.
→ Power savings are 84.8% in a single acting reciprocating pump and 39.2% in a double acting reciprocating pump.

📝 Additional Information:
→ Air vessels are essential for improving efficiency in reciprocating pumps.