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SOLENOID VALVE (CON”T)
Foreign matter will cause the valve to stick, jam or leak. Any solenoid valve should be cleaned periodically. Solenoid
valves should be cleaned when the oil is changed due to contamination by foreign matter. Solenoids are designed for
use in relatively dry locations and in temperatures up to 115 Degree F. Weather-proof and special purpose solenoids
are available. There is always a slight hum when the solenoid is working; a slight click will be heard when the solenoid
opens properly as the core hits the plug at the tope of the core tube.
MAINTENANCE
Periodic Maintenance
DAILY: Visually check oil level in sight glass & color, oil flow through the solenoid & oil lines
Weekly: Check inlet filter
Every 3 Months/ 500-750 hours– Change oil
3000 Hours– Change exhaust filter.
Replace V-belt and Discharge valves
10,000– Replace bearings and seals. This is to be done by specially trained service personnel.
Change oil every 500-700 hours or as needed. Clean oil reservoir housing every 1000 hours to increase the life of the lubricating oil.
Darkening of the pump oil indicates pump wear or chemical reaction between the oil and the gases being pumped. White milky oil is
an indication of water contamination...use gas ballast to clear oil or change oil. Water can also be removed by draining water from the
pump (oil drain valve) before starting the pump.
DISCHARGE VALVES
Discharge valves are located inside the oil reservoir, under the oil baffle & valve plate. After draining oil from the pump, remove valve
assembly by removing the six (6) cap screws and valve gasket….inspect valve discs (26C), seat (26D) and springs (26B) for wear.
Change if required.
Repair kits
RP-50B: Pt#RKIT-RP50B-US
Repair Kit includes bearings, shaft seals, gaskets, o-rings, discharge valves & misc. hardware .
NOTE:
US Vacuum Pumps LLC is not liable for operational failure due to mistakes made by non-US Vacuum
personnel during the installation/operation or the utilization of non-US Vacuum parts
OXYGEN SERVICE PUMPS:
Do not use the RP-50WS pump in oxygen enriched applications that is identified as any application which has a process
gas that is 25% or more oxygen.
HYDROGEN SERVICE PUMPS:
Do not introduce atmospheric air into the pump when pumping hydrogen gas. Keep the gas ballast valve, suction vent
valve and oil mist filter suckback line valve CLOSED at all times. Only open above mentioned items when the pump is
safely isolated from the process by closing the inlet isolation valve.
