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The Miguel Malvar-class frigate is a class of frigates designed and currently built by Hyundai Heavy Industries (HHI) for the Philippine Navy.It was previously known as the HDC-3100 corvette based on the company's product nomenclature system and the service's acquisition project name until it was reclassified to frigate "FF" and then to its current "FFG" guided-missile frigate designation.
Piston pumps can be made variable-displacement by inserting springs inline with the pistons. The displacement is not positively controlled, but decreases as back-pressure increases. Another variation is the variable-displacement vane pump, a type that has found usage in motor vehicle automatic transmissions, such as the General Motors Hydra-Matic.
Different types of pumps are suitable for different applications, for example: a pump's maximum lift height also determines the applications it can be used for. Low-lift pumps are only suitable for the pumping of surface water (e.g., irrigation, drainage of lands, ...), while high-lift pumps allow deep water pumping (e.g., potable water pumping ...
This is a list of major gas station chains in the Philippines. This includes the "Big Three", which refers to the top three companies in the oil industry: Petron, Shell, and Caltex. Historically, Seaoil was part of this grouping. [1]
Pentair plc (PNR) is an American water treatment company incorporated in Ireland with tax residency in UK, with its main U.S. office in Golden Valley, Minnesota. [6] Pentair was founded in the US, with 65% of company's revenue coming from the US and Canada as of 2017.
Specific Pump Power (SPP) is a metric in fluid dynamics that quantifies the energy-efficiency of pump systems. It is a measure of the electric power that is needed to operate a pump (or collection of pumps), relative to the volume flow rate. It is not constant for a given pump, but changes with both flow rate and pump pressure.