Auto molding PTFE seals and seats offer a wide variety of benefits, especially for high-volume production runs. In this blog post, we cover some background on both PTFE and auto molding (also known as compression molding) and discuss why this particular manufacturing process is often preferred by engineers for both seals and ball valve seats.
Finding the right sealing solution for aerospace applications involves a host of considerations, especially when it comes to the jacket material. However, there is one high-performance solution that rises to the top over and over: PTFE aerospace seals.
Aerospace Seal Challenges
Aerospace sealing solutions can face a wide range of harsh environments that can include exposure to extreme temperatures, high pressures, and corrosive chemicals such as de-icing liquids and aviation fuels. There is also the ever-present demand for energy-efficient solutions, critical requirements related to safety, and compliance with industry standards.
In addition, aerospace seals must often perform in potentially explosive or flammable environments. There are other constraints in aerospace applications as well, such as the need to minimize weight and promote energy efficiency. And looking to the future, there will also be demand for more environmentally friendly, sustainable solutions.
Advanced EMC Technologies’ Teflon PTFE seals are one of their frontline products, in continuous demand across many industries. The seal offers perfect static and dynamic sealing for the most demanding applications. Other key features include low friction, chemically resistant, dry/lubricated running used in many industries such as fluid handling, semiconductor, aerospace and instrumentation..
Talking about it, a senior executive with the company said, “The component is an integral part of the equipment across industry sectors. It can withstand extreme temperature, chemicals and pressure. Sealing jacket is made of resilient PTFE and can be energized by an internal spring when needed which applies a load to the sealing element at low pressures. It has unlimited shelf life and controlled friction/load.”
Spring energized seals have a resilient seal jacket and compensates for jacket wear, hardware misalignment or eccentricity. Polymer seal jackets materials include Virgin PTFE, Carbon/Graphite PTFE, Moly/Filled PTFE, Glass/Moly PTFE, Polyimide/Filled PTFE, UH/Polymer PE, 60% Bronze / filled PTFE and PCTFE / KEL F. FDA approved low friction Virgin PTFE is excellent for light duty service, cryogenic applications and low molecular weight gas service.
Carbon/Graphite PTFE offers superb resistance to heat and wear. Good in liquids and steam, it is recommended for dry or semi-dry applications. The executive added for Glass/Moly PTFE, “It works well for high pressure applications and is impressive in hydraulic, steam and water. The material is abrasive in rotary service against soft metals.”
Polyimide/Filled PTFE seals are outstanding in dry service with low wear rate in vacuum and inert gases. It has very low abrasion to dynamic mating surfaces. UH/Polymer PE has higher friction than PTFE compounds. Static and slow dynamic PCTFE / KEL F is best grade for cryogenic applications. 60% Bronze / filled PTFE excels at very high rotary speeds with low pressure.
About Advanced EMC Technologies
Advanced EMC Technologies is an acclaimed company offering industrial grade polymer seals and bearings. The company deals in PEEK polymer seals, spring energized Teflon seals, PTFE rotary shaft seals, polymer bearings and bushings, precision components, nylon bushings and several other such products. The company provides quality products to meet budget and service expectations to clients.
Businesses in Texas needing chemically resistant, low friction static and dynamic sealing solutions can procure these from Advanced EMC Technologies. They produce high grade FDA compliant PTFE seals that can withstand extreme temperature and pressure.
An executive with the company threw more light on the feature saying, “As the system pressure raises enough to take over from the spring and engage the shaft an ultra-efficient seal is created. The spring of the spring energized seal provides permanent resilience to the seal jacket compensating for jacket eccentricity, wear and hardware misalignment.”
Other salient features of the seals are fluid handling, high PV grades, unlimited shelf life, controlled friction/load and FDA/USDA compliance. The seals are efficient in dry running or lubricated, cryogenic and HPLC applications. They can effectively be used across sectors like medical and defense, medical, biomedical, food service, oil & seismic transportation and pharmaceutical. Polymer seal jacket are made of varied materials like virgin PTFE, carbon/graphite PTFE, moly/filled PTFE, glass/moly PTFE, polyimide/filled, UH/polymer PE, 60% bronze/filled PTFE and PCTFE/ KEL F.
FDA approved Virgin PTFE are known for low friction and light duty service. The executive elaborated, “1000 Fluorolon Virgin PTFE seals are excellent for cryogenic and low molecular weight gas service. It can withstand temperature range of -320 to 450F. Extrusion resistance and friction rating is lowest. Carbon/Graphite PTFE 1034 Fluorolon jacket seats, on the other hand offer excellent resistance to heat and wear. It is recommended for dry or semi-dry apps. It can stand temperature ranges of -320 to 500F. Extrusion resistance is moderate and friction rating is low.”
1017 Fluorolon Moly/Filled PTFE seals are excellent in dry gas with better wear resistance. Temperature range is -320 to 525. Extrusion resistance is very high and Friction rating is low. 1050 Fluorolon Glass/Moly PTFE seals offer superlative wear and heat resistance. These are abrasive in rotary service against soft metals and effective in high pressure applications. It is meant for temperature ranges of -250 to 550F, have very high extrusion resistance and moderate friction rating.