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| 887 Challenger Series
www.natvac.com | 800.253.5500
System Requirements _______________________________________________
High Quality Components
• The 887 Challenger is a high performance vacuum pump and
requires compatible, high quality components as manufactured by
NVE�
Shutoffs
• We recommend the use of our portal/portal shutoff and our 12 gal-
lon scrubber/secondary shutoff�
Integral Final filter
• The 887 Challenger is fully equipped with an integral final filter.
Hose
• Use 4” or larger hose to pump your system� We recommend you
use a hose that can withstand high temperatures such as hot tar-
asphalt hose�
Pressure Relief and Vacuum Relief Valves
• Sufficient vacuum relief (at least one 1.5”) should be installed
between the vacuum pump and the moisture trap� This will allow
the vacuum relief valve to relieve vacuum to the pump even when
the moisture trap shut off ball activates shutting off flow of air to the
vacuum pump� Vacuum relief setting will vary depending on such
factors as vacuum pump RPM, ambient temperature, altitude of
pumping operation, etc� Your vacuum relief valve(s) should be set
such that the vacuum pump exhaust temperature does not exceed
380 degrees F after 30 minutes of operation with all tank valves
closed� An exhaust temperature gauge has been installed to assist
and monitor this process�
• Sufficient pressure relief valves (at least two 2”) should be installed
in the system� Pressure reliefs should be adjusted to a level
allowed by the vacuum/pressure tank manufacturer�
WARNING: The vacuum pump will likely put up far more pressure
than your vacuum pressure tank is designed to withstand. Over
pressuring your vacuum/pressure tanks can cause an explosion
resulting in death.