Q. What is a jet pump? I do not see any reference to it in your standards and would like to learn more about it.
Topic Sponsor
Top Pumps Articles
The Hydraulic Institute NPSHA Margin Work Group (1) recommended NPSH margins ranging from zero to four times the NPSHR (NPSHA÷NPSHR = 1 to 5). The higher values apply to pumps with high to very high values of suction energy, a term defined as the product of the diameter of the pump suction nozzle, pump RPM and the suction specific speed.
At their simplest, metering pumps are used to inject liquids at precisely controlled, adjustable flow rates, which is a process called metering.
Most three screw pumps are of the single suction design, but very large flow pumps are double suction. The vast majority of twin screw pumps are double suction designs, which effectively puts two single suction pumps in parallel in one casing. The double suction designs, both three-screw and two-screw, are inherently in hydraulic balance in the axial direction due to their symmetry.
OEM pumps and parts outperform replicated products, and can save thousands per year in operating costs.
Many pumps in power plants and other heavy industries are designed and custom engineered for specific applications. The repair and servicing of these pumps should also include careful engineering review.
It is common practice for the designer of a new centrifugal pump to model the new pump from an existing pump. Each dimension of the existing pump (except the shaft diameter) is multiplied by a modeling factor "F" to obtain each dimension of the new pump.
Standards for repair will begin with a standard for vertical turbine pumps.The pump industry is undergoing renewed interest in the technical aspects and quality of repairs.
The preferred method for starting reciprocating pumps; Critical speed for pumps; Timing gears on rotary pumps
Latest Pumps Articles
New resin and Kevlar bulk molding compound adds strength to pump wear parts
Hydraulic Institute has been creating pump standards since 1917
Solid-body plastic AODD pumps deliver the operational ability required for challenging abrasive-handling applications.
Computer-aided engineering enables the improvement of pump hydraulic performance in power plants.
Detuning devices solve high vibration problems in power station water circulating pumps.
Choosing the right enclosure to protect pump monitoring equipment is paramount.
"So easy that even a caveman can do it,” as stated in a popular TV commercial, could easily be used to describe today’s predictive maintenance tools because they work so well.
Charlie Jackson was unaware of any centrifugal pump manufacturer that knew how to calculate hydraulic axial thrust produced within liquid ends of their pumps.
Standards for repair will begin with a standard for vertical turbine pumps.The pump industry is undergoing renewed interest in the technical aspects and quality of repairs.
The performance of a centrifugal pump with a trimmed impeller will follow the affinity laws as long as that trim is relatively small.
Industry News
Columns and Blogs
The performance of a centrifugal pump with a trimmed impeller will follow the affinity laws as long as that trim is relatively small.
Standards for repair will begin with a standard for vertical turbine pumps.The pump industry is undergoing renewed interest in the technical aspects and quality of repairs.
Charlie Jackson was unaware of any centrifugal pump manufacturer that knew how to calculate hydraulic axial thrust produced within liquid ends of their pumps.
