Reciprocating plunger pumps are a type of positive displacement pump that drives liquid at high pressures in a variety of industrial applications. They operate by creating changes in pressure using a moving component known as a plunger which, on its outward motion, draws fluid into the chamber through the suction valve; then on its inward motion, opens up the discharge valve and pushes the fluid out a delivery pipe at a rapid velocity. Working with the plungers are the pump valves, plunger packing and stuffing box components to ensure optimal performance.Read More >>
Pump cavitation is a phenomenon that can wreak havoc on even the most durable and robust pumping systems. Blame is often unfairly cast on the construction of the pump itself. However, most times, cavitation is the result of poor system design, lack of maintenance, and improper understanding of the environmental factors that contribute to pump performance, such as sea level and vapor pressure.
The key to preventing pump damage lies in a sound understanding of a parameter called the net positive suction head (NPSH). To avoid cavitation, the pressure at all points of the fluid must remain above the vapor pressure; in other words, the available net positive suction head (NPSHa) must be sufficiently larger than net positive suction required (NPSHr) at the pump inlet.
The NPSHa is determined by the following formula:
NPSHa = Pa +/- Pg +/- Pz – Pvp – Pf – Pac
Pa = Atmospheric pressure
Pg = Gauge pressure at the supply tank
Pz = Head or lift pressure
Pvp = Vapor pressure of the liquid at its actual temperature
Pf = Pressure required to overcome friction
Pac = Acceleration pressure
Here, we will look at the various factors that affect the NPSHa value and how they influence cavitation.Read More >>
Triangle Pump Components, Inc. (TPCI) recently trademarked three product names for our reciprocating pump valves and components. These valves and extension rods, all of which meet ASTM and ISO 9001-2015 standards, feature names derived from various origins with significant meanings related to their features and applications.
Below is a closer look at the meanings behind three of our newly trademarked products.
June is National Safety Month—a time when the industrial sector focuses on key issues that can impact employee safety. As the summer months roll in, northern states get hot and southern states get even hotter, so ensuring employees stay safe and cool becomes a concern in facilities nationwide.Read More >>
Offering great versatility, mechanical seals are commonly employed to seal pumping equipment. However, there are still a number of pumps and devices that make use of compression packing for sealing purposes. Such pumps are used across a wide range of industries, including pulp and paper manufacturing, power generation, and water treatment, and play a critical role in supporting various industrial processes.Read More >>
To put it simply, pumps work based on the principle of pressure difference: Fluids flow from regions of higher pressure to regions of lower pressure, and pumps facilitate fluid transfer by creating a pressure difference, or pressure head.Read More >>