Monthly Archives: April 2021
- April 30, 2021
When Vesconite Bearings’ team visited knife-gate valve manufacturer A.C.Valves to fully understand how its client was using low-friction wear-resistant Vesconite polymer guide strips in knife gates, the company was manufacturing two valves for a mine that had experienced a break-down.
The 20” valves had been requested the day before and the mine’s supplier was due to pick them up on the day of Vesconite’s visit to the company, which can manufacture 200 – 300 knife gate valves a month depending on the size of the valve.
A.C.Valves director Collin Scott notes that the mine required two narrow-design Wafer Ring Flange (RF) bi-directional valves, which are A.C.Valves’ most popular design and the design that uses Vesconite as a guide strip.
The valves, which handle light and medium slurries, are relatively thin and are designed in keeping with mining company plant designs that require small compact plants.
- April 28, 2021
In the Oil & Gas industry, the need for elastomers to seal higher pressures for sustained periods of time with minimal damage is abounding. Applications such as drilling tools, completions equipment, blow out preventers, and subsea pressure control systems now routinely require or exceed 15,000 psi with both liquid and gas media for functional testing and qualification. Parker meets this challenge, providing a best-in-class extrusion and rapid gas decompression resistant hydrogenated nitrile (HNBR) compound called KB292.
One of the most common failure modes for seals utilized in high pressure applications is known as extrusion or nibbling. This failure method emerges when the seal material is forced into a clearance gap that is present between the mating substrates and gradually can be cut, nicked, or chewed away.
- April 22, 2021
The shape and size of irregularities on a machined surface have a major impact on quality, performance (leakage), and longevity.
The quantification and management of surface irregularities, through the measurement of surface roughness, is necessary to maintain high product performance.
Part 4 of our video series on Surface Finish will examine filtering. The full table of contents is below:
Part 4 will discuss:
1. Cut-off Length / Filter
- Internationally recognized cut-off filters of varying lengths
2. Surface Profiles
- Measured
- Primary
- Roughness
- Mean Line
3. Profile Lengths
- Traversing/Tracing Length
- Evaluation Length
- Sampling Length
- April 20, 2021
Style 1303-FEP Packing resists heat, pressure and chemicals. It's compliant with the most stringent VOC and VHAP emissions regulations.
Garlock Style 1303-FEP combines the low emissions performance of engineered sets with the flexibility and convenience that comes with spool stock compression packing.
Specifications of Style 1303-FEP
- Min. Temperature: -328°F / -200°C
- Max. Temperature: 850°F / 455°C (1,200°F / 650°C Steam)
- Max. Valve Pressure: 4,500 psi / 310.3 bar
- Min. Temperature: -328°F / -200°C
- April 15, 2021
Difficult seal applications come from all industries and sectors of the economy.
While far-reaching operating conditions certainly consume their fair share of engineering hours, often one constraint also probes the boundaries of sealing technology and design ingenuity: limited hardware space.
The Client’s Issue
A manufacturer was using a pneumatically actuated cylinder to dispense a chemical in a production process. The piston was drawn back in the cylinder thus filling it with the chemical product. The piston was then pushed forward to dispense the chemical out of a nozzle.
- April 13, 2021
Have you been frustrated with going through multiple design iterations when rubber components are failing due to high stresses or your device has been leaking due to insufficient compression? Have you lost months and months of precious time having to recut tools and make design changes?
FEA takes out the guesswork
Finite element analysis, also known as FEA, is an effective tool used in design iterations. It allows for different design ideas, options, and alterations to be quickly, effectively, and precisely compared.
Using FEA can improve both the speed and quality of product design as well as reduce the overall cost. Rubber parts, such as silicone diaphragms, septums, seals, valves, tubing, and balloons are critical components in today’s medical devices that can benefit from the use of FEA.
- April 09, 2021
The shape and size of irregularities on a machined surface have a major impact on quality, performance (leakage), and longevity.
The quantification and management of surface irregularities, through the measurement of surface roughness, is necessary to maintain high product performance.
Part 3 of our video series on Surface Finish will examine important elements of why and how we measure surface finish. The full table of contents is below:
Part 3 will discuss:
1. Why we measure Surface Finish
2. Types of surface roughness
- Linear
- Areal
3. How we measure surface finish
- Contact methods
- Non-Contact methods
4. Contact & Non-Contact measurement considerations
- April 07, 2021
High temperature gasketing excels in the harshest conditions—intense heat and high pressure. These high performance gasket materials have been laboratory tested for fire safety. They maintain an effective seal during pressure and temperature fluctuations, and their excellent torque retention lowers leakage rates and reduces maintenance time.
This blog post will examine the five types of high temp gasket material that GFS carries from Garlock and Thermoseal Klinger.
- Garlock Style 9800
- Garlock Style 9850
- Garlock Style 9900
- Garlock Therma-Pur 4122-FC Ring Gasket
- Klinger PSS High Temp
- April 01, 2021
Rod Seals are the most important seal within any hydraulic sealing system. Rod Seals prevent leakage of hydraulic fluid to the outside. Additionally, Rod Seals help contribute, in combination with a Wiper Seal, to preventing contamination of the environment. GFS Rod Seal profiles are available as single acting (pressure from one side) or double acting (pressure from both sides).
This blog article will discuss the different profile, their recommended applications, and operating parameters.
