DuPont™ Kalrez® – Total Cost of Ownership Analysis
The drive to reduce costs and environmental concerns have caused many design and processing engineers to turn to perfluoroelastomer sealing parts as the most cost-effective sealing solutions. The value-in-use of perfluoroelastomer can be proven in operating conditions where conventional elastomers fail. Even under less arduous conditions, DuPont Kalrez perfluoroelastomer seals can be the best solution, as they can last significantly longer than conventional sealing solutions.
Economics depend on the total system cost
When considering the economics of elastomeric seals, it is vital to look beyond the total cost related to the sealing solution. The total system cost in use is the sum of the cost of the O-ring seal plus the installation cost plus the downtime cost (including loss of productivity through leakage and clean-up costs).
In the fall of 2002, Chestnut Hill Academy teachers Peter Randall and Rob Ervin were looking for a way to get students excited about engineering and technology.
That led them to found Team 1218, the academy’s award-winning robotics team.
Team 1218 began with four curious students and two willing mentors. The team had very few resources in the beginning, using an empty closet as its shop and a hall as the build space.
Despite the rookie team’s inexperience and limitations, its passion and dedication was the driving force to winning both the 2003 Philadelphia Regional and Rookie All-Star award.
Gallagher Fluid Seals is a proud sponsor of Team 1218. The students’s achievements with the program and afterwards as alumni are only matched by the dedication of the faculty leaders and mentors.
At the time Team 1218 was founded, CHA had an engineering graduation rate of exactly 0%. The school quickly recognized the importance of a robotics program to the students and the community, and began to fund the team in 2003 in hope that it would encourage more students to become scientists and engineers.
In this post, we’ll talk about the common types of O-Ring applications, and their impact on O-ring sizing and hardware design.
Static Axial Seals
When designing grooves for static axial seals, the first consideration is whether the pressure is coming from inward or outward.
In situations involving outward pressure, the outside diameter of the groove is primary, and the groove width is the primary consideration for the inside diameter. For inward pressure, the inside diameter is primary. This ensures that the O-Ring needs to move the least distance to seal the extrusion gap.
Parker’s combination of advanced seal design technology and material expertise has produced a reliable zero-leak rod seal package for hydraulic cylinders for greater equipment output which:
Extends useful cylinder life
Maximizes equipment uptime
Extends maintenance intervals
Integral to the design of the zero leak seal package are the characteristics of Parker’s Resilon™ polyurethane material – designed for extended temperature range, wear resistance, compression set resistance, and overall toughness.
We’ve spent the past few entries on this blog discussing O-rings. Now we’d like to talk about the design and performance differences between elastomeric O-rings and Quad-Rings™.
The O-ring is a doughnut-shaped circular cross section seal that can be used nearly anywhere in the sealing industry. The Quad-Ring™, a 100% retrofit option for any O-ring application, can and will outperform an O-ring in many technical areas.
O-Rings are solid-rubber, doughnut-shaped seals used to block the passage of a gas or liquid when pressed between two mating surfaces.
They are amongst the most widely utilized seal designs in the world. Due to the number of ways they can be utilized, there are essentially an endless number of O-Ring sizes.
But despite the wide range of O-Ring sizes, every O-Ring has the same two dimensions: the inner diameter (ID), and the cross-section (CS). To attain an adequate seal, it must achieve proper compression, approximately 18-20% in the cross sectional characteristic.This creates a boundary to keep fluids in and contaminants out.
Pumps that operate with a diaphragm have been in use since the mid-1800s because of their simplicity and effectiveness.
That isn’t to say these pumps have remained unchanged in all that time. More than 150 years of innovation and technical improvements in diaphragm profiles and elastomeric material sciences have secured their use for a wide range of pumping and reciprocating applications.
The design and utilization of diaphragms in pumping applications is a vast topic, yet it is one that Gallagher Fluid Seals’ application engineers have mastered by approaching the manufacturing and design of diaphragms with a step-by-step process.
The result is diaphragms that are expertly designed and made from the most appropriate material and crafted in a way that optimizes cost and manufacturability. Freudenberg-NOK Sealing Technologies are our vital partners in this process, and are worldwide leaders in the diaphragm field.
Technology is always moving forward, but some things stand the test of time.
One of those things is the O-Ring, which was first patented in 1896. What is an O-Ring? It’s a doughnut-shaped loop designed to prevent the passage of liquids or gases. It’s one of the simplest precision mechanical pieces ever produced, and continue to be one of the most widely-utilized sealing products.
O-Rings can be made from plastic or metal, but for the purposes of our blog, we’ll focus solely on rubber – or elastomeric — O-Ring design.
An O-Ring, also known as a “torus,” works in tandem with the glands in which they are installed. The gland is normally cut from the metallic hardware, and works with the O-Ring to seal. The gland and the O-Ring must be designed together to insure top performance.