Winston Engineering Case Study

Case Study 4 Title: Positive Displacement Pump Faulty Findings & Observation: 1. All parts were in good condition upon dismantling pump from the skid. 2. Technician discovered that the plug near air inlet was not unplugged and it needed to be replaced with 1/4" muffler for this model ( XPS1530/SSAAA/TWS/TF/STF ) 3. Pump only achieved 50% when it was assembled to the skid. Possible causes on the findings and observations: 1. Spill stop having 3/4" pneumatic actuator valve gas restricted air flow significantly. 2. Pump eventually achieved 100% performance by changing 1" filter regulator. Solution and Conclusion: 1. Diaphragm pump air inlet and outlet can't be downsized, it has to be one size up for all kind of fittings. centre block was not unplugged  centre block has been unplugged. rigid pipe was installed, inflexibility can cause fitting or muffler plate to crack. 3/4" fittings was installed on air discharge ...

Case Study 3 Title:  Pump leaking from stuffing box  Findings & Observation: 1. Water  leaking from stuffing box when outlet valve partially closed. 2. Pump back plate was assembled at wrong position (flush plan 01) Possible causes on the findings and observations: 1.  upon the reassembly of pump , pump run with fully open outlet valve – no leaking found. When  outlet valve was  partially closed at 4.5 barg, the stuffing box started to leaking very badly. 2.  During priming stage, we suspect the pump inlet pipe could be too long and it's without a foot valve. (water is muddy and can’t see much) 3. Technician  found shaft protection sleeve loose – easy to withdraw from pump shaft. The shaft protection sleeve O ring likely to be worn or broken. Solution and Conclusion: Recommendations: 1. Replace shaft sleeve O ring as factory has wrongly installed a slightly smaller size of O ring that results in p...