Delrin® and Sustakon® are both semi-crystalline thermoplastics that are used in many industries today. In the reciprocating plunger pump world, these thermoplastics are used in the disc or valve seat of the plate valve, spherical valve, or Durabla® valve and can play a key role in the reliability, durability and longevity of these valves. Since the valves are exposed to a variety of often harsh environments, it’s important to understand which thermoplastic is better suited for each application. Let’s take a closer look at them individually, and then we’ll do the apple to apple test.Read More >>
When selecting a reciprocating pump valve, it’s important to understand many critical details about the pumping application, including the pressure rating and temperature, viscosity, and composition of the fluid being pumped. Is the fluid corrosive? Will it contain abrasive solids? If so, how large might the particulates be? For example, in some mining applications, it makes more sense to select a pump valve that is engineered to withstand small solids and other abrasive materials.Read More >>
We are at it again! Triangle Pump Components, Inc. (TPCI) has trademarked more products to distinguish us from the rest of the pack. With so many products on the market today, trademarked names can help identify the efficient, quality products from the generic ones. So without further delay, here are our newly trademarked products . . .
In a perfect reciprocating pump system, suction and discharge valves should gently open and close as the plunger reaches its full stroke extension into the fluid end or full point of retreat back toward the power end. However, we all know we don’t live in a perfect world and this perfect functionality is never the reality. There is always some lag time in the opening with any model pump valve. The problem is - the more lag, the greater the problem for the pump.Read More >>
UPDATE: Triangle Pump Components, Inc. (TPCI) is proud to announce that the CavPack® Valve Set, Resista® AR Valve, and the DynaRod® Extension Rods have been granted "Registered" trademark status!
Below is a review of the meanings behind the newly registered product names.
Spherical valves are just one of the many valves working in high-pressure applications today in reciprocating pumps. It is a common belief that a valve is a valve and that they are equal regardless of type. While this is true in the sense that all valves allow or inhibit the flow of fluids, there are minute differences that make one valve preferable over another in any application. Let’s take a brief look at the most common types of valves used in reciprocating pumps with some of the advantages and disadvantages of each.Read More >>
Reciprocating pumps are useful in various applications. These specialized pumps have countless uses, but their main use is to pump liquids.Read More >>
Industrial applications that require high-pressure system components often rely on plunger pumps for successful operation. These pumps see frequent use in process technology and cleaning applications.Read More >>
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 >>