1. The cylinder clearance volume of the acetylene compressor is too large, which will reduce the suction volume. Elimination method: adjust the cylinder clearance packing or piston rod wear caused by leakage. Repair or replace the seal or piston rod. Insufficient supply of lubricating oil reduces air tightness and causes leakage. Elimination method: disassemble and inspect the suction and exhaust valves, and find that the valve is short of oil, and the amount of lubricating oil should be increased.

2. There are metal particles between the valve seat and the valve plate, and the acetylene compressor leaks due to the lax closing, which affects the air volume. Elimination method: disassemble and clean, if the valve cover of the suction valve is hot, the fault is on the suction valve, otherwise it is on the exhaust valve. The new suction valve spring is too rigid when first used, causing the opening to be slow; after the spring is used for a long time, the valve is not opened in time due to fatigue, resulting in air leakage. Elimination method: Check the spring rigidity, or replace the appropriate spring. The valve plate and the valve seat are not uniformly worn, thus causing air leakage due to lax sealing and affecting the air volume. Elimination method: repair by grinding, or replace with new valve plate and valve seat.
3. The suction valve of the acetylene compressor is not raised enough, the flow speed is accelerated and the resistance is increased, which affects the air volume. Elimination method: adjust the lift height and replace the appropriate lift limit ring. Cylinder wear (especially unilateral wear) exceeds the maximum allowable limit, and the gap increases, causing air leakage and affecting the amount of air. Elimination method: Repair by boring or grinding, and replace with new cylinder liner in serious cases.
Through the above introduction and analysis of how to solve the insufficient pumping of acetylene compressor, hope it helps you.