1. Symptom: The pump cannot open
the reason:
(1) The inlet valve core is broken so that the valve cannot be opened
(2) There is water in the cylinder
(3) Rocker pin off or taper pin off
(4) Damage to the piston rings of gas and oil cylinders
(5) cylinder wear clearance is too large
(6) Poor contact of valve plate and valve seat
(7) Insufficient steam pressure
(8) The piston rod is in the middle position, causing the valve to close
(9) The valve plate of the discharge valve is reversed and the outlet is closed.
Approach:
(1) Replace valve or spool
(2) Open the drain valve to eliminate water in the cylinder
(3) Install the rocker pin and replace the taper pin
(4) Replace gasoline cylinder piston ring
(5) Replace cylinder or piston ring
(6) scraping valve plate and valve seat
(7) Adjust steam pressure
(8) Adjust the position of the piston rod
(9) Correctly install the discharge valve
2. Symptom: Pumping out
the reason:
(1) The inlet temperature is too high to produce vaporization, or the liquid level is too low for inhaled gas
(2) The inlet valve is not opened or opened small
(3) Loose piston nut
(4) The inlet and outlet are connected due to the blow-off of the inlet valve gasket
(5)Cylinder liner wear, piston ring failure
Approach:
(1) reduce the inlet temperature, ensure a certain liquid level or adjust the number of reciprocations
(2) Open the inlet valve to a certain opening or adjust the number of reciprocations
(3) Tighten the piston nut
(4) Replace the inlet valve gasket
(5) Replace cylinder liner or piston ring
3. Failure phenomenon: produce noise or vibration
the reason:
(1) Excessive piston stroke or evacuation
(2) Loose piston nut or piston rod nut
(3) loose cylinder liner
(4) After the valve breaks, the fragments fall into the cylinder
(5) Anchor screw loosening
(6) Looseness of the crosshead center frame connection
Approach:
(1) Adjusting piston stroke and reciprocation times
(2) Tighten piston nut and piston rod, nut
(3) and tighten cylinder liner screws
(4) Remove debris from cylinder and replace valve
(5) Fixed anchor bolts
(6) Repair or replace the crosshead
4. Failure phenomenon: oil leakage from the gland, leakage
the reason:
(1) The piston rod is worn or the surface is not smooth
(2) Damaged packing
(3) Packing gland is not tightened or the packing is insufficient
Approach:
(1) Replace the piston rod
(2) Replacement of packing
(3) Filling or tightening the gland
5. Failure phenomenon: cylinder piston rod overheating
the reason:
(1) Oil injector check valve failure
(2) Insufficient lubrication
(3) The packing is too tight
Approach:
(1) Replace the check valve
(2) Adding lubricant
(3) loose packing gland
6. Failure symptoms: unstable pressure
the reason:
(1) Poor valve closing or uneven spring force
(2) The piston ring is not flexible in the groove
Approach:
(1) Polishing valve or replacement spring
(2) Adjustment of piston ring and groove
7. Failure symptoms: insufficient traffic
the reason:
(1) Poor valve
(2) Excessive gap between piston ring and liner
(3) Too few strokes
(4) stroke is too short
Approach:
(1) Grinding or replacing valves, adjusting springs
(2) Replace piston rings or liners
(3) Number of adjustment strokes
(4) Adjustment stroke

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