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SURVEYDurham Geo
2175 West Park Court |
| Back to MVP IV pump overview |
MVP IV Remediation PumpDescription
The image on the right shows an assembled pump on the left, and a dissasembled pump with components to the right. The thread together design provides complete access to all the internal components. This makes it possible to change pump loading configurations easily. If needed, the pump head can easily be removed to access the air inlet and exhaust valves as well. Positive Valve Shifting
The new free-floating actuating arm ensures a positive air valve shift. The design permits the use of larger and simpler air exhaust valves to eliminate air quality and stalling concerns. The poppet design valves provide a larger surface area improving air efficiencies. Every MVP IV pump includes the override feature allowing the pump and discharge line to be emptied from the surface reducing the pump’s weight during its removal. An additional ¼ in air line is required. The MVP IV features an all-stainless steel linkage system with Teflon® bushings with a synthetic glass resin float to insure reliability and chemical compatibility. Stainless steel floats are optional. For added durability, all MVP IV pumps have a stainless steel body. The MVP IV pump uses clampless barb fittings for the 3/4 in discharge and 3/8 in air exhaust lines. The air supply uses a 1/4 in PushLok® fitting. Quick connect fittings (TR-80910) are available as an option. Flow rates range from 8 gpm on top-loading pumps to 13 gpm on standard
pumps. Pump flow rates will be affected by the amount of head above the
pump. Should lower flow rates be required, the flow control valve TR-698 can
be
installed on the exhaust line of the MVP IV pump. This will allow the user
to restrict the air exhaust which regulates the fill time of the pump.
It is important to properly size the air supply and discharge lines to accommodate
for friction loss. For line sizing, refer to the Air
Flow and Pressure Loss table (pdf, 255 KB) and Water
Flow and Pressure Loss table (pdf, 241 KB). Loading Configurations
Top loading pumps are selected for pumping total fluids (LNAPL and ground water simultaneously). The top loading pumps will produce flow rates of up to 8 gpm — depending on the head above the pump. Water table draw-down will be maintained at a level corresponding to the top inlet of the pump. Shorter length pumps are available for lower drawdown requirements. See how the pump works >> Bottom loading pumps are selected for dissolved phase, DNAPL or leachate applications. When installing the pump, the head is positioned at the depth of the desired water table depression. During start-up, the pump fills from both the top and bottom inlet ports. As the water table depression zone stabilizes, the pump will fill from the bottom only. The bottom loading pump can be configured with a closed top to reduce the possibility of debris entering through the inlet. This may be particularly useful in leachate applications or applications where floating debris is present. See how the pump works >>
See Brochure for other types and configurations, and for the selection table for the MVP Series Pumps. For more information> Brochure (PDF
249 KB) Related items> MVP LS and MVP LD — leachate and condensate
pumps for use at landfills
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The
MVP IV Pump uses an internal float that responds to the fluid level
within the pump body to cycle the pump automatically, based on the recharge
of the well. As the pump fills with fluid, the float moves to the upper
position, activating the mechanical arm which opens the air inlet valve.
This allows air to enter the pump chamber, simultaneously pressurizing
the vessel and closing the upper and lower inlet check valves. The air pressure moves the fluid to the surface. As
the fluid is emptied from the vessel,
the float returns to the lower limit — off position — closing
the air inlet and opening the air exhaust valve. During the filling cycle,
air is vented through the exhaust port and the cycle is automatically repeated.
See how the 
The
air inlet and air exhaust valves are incorporated on the same side of the
pump to impart a mechanical advantage which makes the valve shift fully and
reliably. This leverage is seven times greater than would be available if
the valves were located on opposite sides of the pump head. 
