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Pumptec pumps are designed and manufactured to withstand rugged use and last for years. Operational conditions or other external factors like clogged nozzles or filters, worn seals, or pinched hoses may diminish performance over time. Use these pump troubleshooting tips to pinpoint and correct potential issues.
The most common cause for low performance is worn nozzles. Pumptec recommends that nozzles made from hard materials, not brass, should be used with our pumps. The erosion resulting from high-pressure water is powerful and will increase nozzle size, which will result in lower pressure over time.
Avoid the common mistake of adjusting the regulator bypass pressure higher to compensate for lower spray pressure. If increasing adjustment does not increase spray pressure, then replace the nozzle.
As the pump operates, the valves can begin to degrade from exposure to chemicals, heat, cavitation, and abrasives. The small pits in a valve disc or seat will allow small amounts of fluid to leak during each compression stroke and result in less flow going out the nozzle. A preventative maintenance schedule needs to be followed, especially when using harsh or abrasive chemicals.
The primary causes of water leakage are worn seals. Causes of worn seals include wear over time, lack of proper maintenance, abrasive fluids and excessive heat. It is important to monitor pump systems to determine causes of wear and fix them. Pumptec’s seal designs will reveal worn seals in the form of drips below the pump. The leakage would need to be substantial to noticeably affect performance. To prevent seal damage, avoid:
During reassembly, an O-ring can slip out and become pinched permitting water to leak out. It is typically necessary to replace a pinched O-ring because they become misshapen and will not seal properly afterward.
The integrity of connections needs to be maintained over time and this may require periodic inspection. Look for leaks from cracks in hoses or from fitting connections.
Occasionally pressure gauges can become fatigued and damaged causing malfunction. A good diagnostic practice is to replace the pressure gauge with a known good gauge as a check.
This primary flow control device can be harmed from debris in the fluid or simply worn out from use. The debris-damaged or worn seals in an unloader can allow fluid to leak out the by-pass, decreasing performance.
Most Pumptec pumps have stainless steel plungers standard. After extended use or pumping abrasive fluids, the plungers can become grooved, damaging the seal. Plungers with grooving are not reusable and need to be replaced. Pumptec packages plungers and seals together in kits because they should be replaced at the same time.
When excessively high temperature fluids are run through the pump, the seals and elastomers can become deformed and fail. Proper care must be taken to not exceed 140°F fluid temperature in the pump at any time, including idle time.
Pinched hoses and clogged filters will starve the pump of fluid and damage seals as a result of excessive vacuum. Operating the pump without any fluid can increase seal temperature and damage seals. Be sure you always have adequate amounts of fluid available to the pump.
Follow recommended Service schedules.