Envco – Environmental Equipment

Application
For LNAPL recovery in 2-inch and larger-diameter wells and up to 200-ft depths. Recovers light-end hydrocarbons with SSU values of 80 or lower.

Benefi ts
❖ Will not recover water
❖ Locates product/water interface
❖ Easy installation
❖ Pump fi eld proven for over 20 years
Additional system components may include:
■ Well Clincher
■ Overfi ll Protection Devices
■ Electric Air Compressor
■ SolarNAPL Compressor
■ Hoses and Tubing

Operation
Precise Positioning System (PPS)
The Precise Positioning System includes a surface-mounted pressure gauge to conveniently identify the product/water interface (PWI). When the F.A.P. Plus ZW is lowered into the well, the surface mounted gauge will show a drop in pressure indicating that the PWI has been reached. The system is then raised to accomodate expected water table fl uctuations and the pump will begin to cycle product to the surface. If the PPS shows no air pressure, it indicates that the Zero Water function is activated: the water table has risen high enough to turn the pump off. When the water level recedes and the pneumatic Zero Water switch is turned back on, the pump will cycle again and the PPS gauge will show an increase in air pressure.

ZW (Zero Water) feature
The intelligent logic incorporated in the F.A.P. Plus ZW will start or stop the pump based on the skimmer inlet position. When the water table rise exceeds the standard travel allotted by the skimmer, the fl oat will activate a pneumatic switch, shutting the air supply off and stopping pump operation. When the water table recedes and the skimmer inlet is at the proper product/water interface, the pneumatic switch is released, allowing the pump to re-start automatically. This feature ensures that only product is recovered. The F.A.P. Plus ZW pump will then lift recovered product to the surface and discharge the pumped product to a storage tank that can be fi tted with an optional Tank-Full Shut-Off unit.

F.A.P. Plus™ ZW Pump (TR-51640) - consists of a fl exible, special inner bladder and a fl exible Buna-N® hose which forms the outer pump body. The pump operates by alternately infl ating and defl ating the annular space between the inner bladder and the outer hose. When compressed air is applied, the inner bladder collapses, propelling the fl uid to the surface. When the air is exhausted, the inner bladder rebounds to its original shape, thereby causing a suction which pulls fl uid into the pump. The pump is capable of producing a suction of 17 inches of mercury, enough to recover viscous product and operate in deep wells up to 200 feet.

Ordering Information
TR-51640 F.A.P. Plus ZW™ Pump
Includes F.A.P. Plus ZW pump (TR-51640) and Coalescing Filter/Regulator (TR-748). (Requires skimmer - Order separately),