Can a pump be operated on the left side?
Most pump manufacturers will usually specify how far, on either side of BEP, one of their pumps can be operated without subjecting it to some type of short term damage. It will often be stated as a percentage (80 to 120 percent of BEP), but it can take the form of a simple angled line on the right and left side of the performance curve.
How does a primary and secondary pump system work?
They operate as if they are two independent systems. Depending on the flow rates of the primary and secondary pumps, water can move forward, backwards, or not at all! If both pumps are sized for a flow rate of 10 GPM, when the primary pump is on and the secondary pump is off,…
How does a high head pump work with a secondary pump?
The high head pump P won’t circulate water through the secondary loop, because the common piping, “A” to “B,” is the path of least resistance. When the secondary pump comes on, it can pump away from the common piping, around its loop that includes “A” to “B,” and back to its own suction.
Can a primary secondary pump be hybridized?
Primary-secondary-tertiary designs may also be hybridized, meaning you don’t have to put a tertiary loop on every zone. Rather, you can isolate a high head loss zone with a tertiary pump while continuing to efficiently serve nearby zones with the secondary pumps. Figure 4 shows a primary-secondary-tertiary hybrid design.
Most pump manufacturers will usually specify how far, on either side of BEP, one of their pumps can be operated without subjecting it to some type of short term damage. It will often be stated as a percentage (80 to 120 percent of BEP), but it can take the form of a simple angled line on the right and left side of the performance curve.
They operate as if they are two independent systems. Depending on the flow rates of the primary and secondary pumps, water can move forward, backwards, or not at all! If both pumps are sized for a flow rate of 10 GPM, when the primary pump is on and the secondary pump is off,…
The high head pump P won’t circulate water through the secondary loop, because the common piping, “A” to “B,” is the path of least resistance. When the secondary pump comes on, it can pump away from the common piping, around its loop that includes “A” to “B,” and back to its own suction.
How does a secondary pump work in a VFD?
The secondary pump pulls water from the primary system and pumps it to the coils. • Add a Water Differential Pressure Transmitter near the end of the piping run (in an accessible location). • VFDs and pumps have minimum recommended operating speeds, typically about 20%.
What are the parts of a positive displacement pump?
There are various other parts of both Positive Displacement Pumps and Centrifugal Pumps such as wrist pin bushings, Cross Heads, Stuffing Boxes, Shim Packs, Screws, Screw Liners and Wear Rings etc. Each part or component in a pump plays a very crucial role in its efficient functioning.
Why is the left side of a wastewater pump dangerous?
Another type of low flow recirculation, known as discharge recirculation, occurs when water changes direction at the vane exit and reenters the vane. This will lead to cavitation that erodes the low pressure side of the vane. Wastewater pumps are especially prone to discharge recirculation due to the lack of vane overlap on most two vane impellers.
What kind of pump does a Simpson pressure washer use?
Pump types made by Kranzle: Wobble, Axial Cam. AAA Pumps is a pump made by FNA Group for use in their pressure washer. They own the brand Simpson Cleaning. Used by these brand pressure washers: Simpson. Pump types made by AAA: Axial Cam, Triplex.