The model 800 pilot block is the key control element of all OCV filter separator float controls, the sole purpose of which is to allow only the discharge of clean, water-free fuel from the filter separator.
POWER: Filter separator vessel pressure
ACCELERATOR VALVE: Bonnet of accelerator pilot on discharge slug valve
WATER DRAIN: Bonnet of automatic water drain valve
EXHAUST: Atmospheric drain line
Equipped with the proper counterweight float, the float will “ride” the interface between water and fuel in the filter separator sump. Depending on the water level, the Model 800 will route filter separator pressure from the POWER port to the other components in the system as follows:
FLOAT DOWN: The accelerator pilot bonnet is pressurized, allowing the slug valve to open and discharge fuel. The water drain valve bonnet is vented, keeping it closed.
FLOAT IN MEDIAN POSITION: Both the accelerator and water drain valve bonnets are pressurized. The slug valve remains open and discharging fuel, while the water drain valve opens and begins discharging accumulated water.
FLOAT UP: The accelerator bonnet is now vented, causing the slug valve to close. The bonnet of the water drain valve remains pressurized, and water continues to be discharged.
Body, end caps, internals: Stainless Steel
Seal repair kit: P/N 920010
MAXIMUM PRESSURE: 300 PSI (20.7 bar)
OPERATING TEMPERATURE: 32°-120°F (0°-49°C)
The 800 pilot is used on four different float assemblies, as shown below. For details on these models, refer to the individual model sheets.
|800B||Bottom-mount / 7.5” dia. Flange|
|800C||Side-mount / 4” Victaulic connection|
|800D||Side-mount / 8” dia. Flange|
|800H||Bottom-mount / 10” dia. Flange / Low-profile float|