Browse Topic: Seals and gaskets

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Elbow Assembly 45°, Flared Tube to Retained Nut, for Seal RingAS4316A (Current)09/29/2025
SCOPE IS UNAVAILABLE.
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
ELBOW ASSEMBLY 90°, FLARED TUBE TO ADJUSTABLE END, FOR SEAL RINGAS4303A (Current)05/02/2025
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
TEE ASSEMBLY, FLARED TUBE, ADJUSTABLE END ON SIDE, FOR SEAL RINGAS4306A (Current)05/02/2025
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
TEE ASSEMBLY, FLARED TUBE, RETAINED NUT ON RUN, FOR SEAL RINGAS4302A (Current)05/02/2025
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
TEE ASSEMBLY, FLARED TUBE, RETAINED NUT ON SIDE, FOR SEAL RINGAS4304A (Current)05/02/2025
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
TEE ASSEMBLY, FLARED TUBE, ADJUSTABLE END ON RUN, FOR SEAL RINGAS4305A (Current)05/02/2025
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Improving the Sound Transmission Loss of Wire Harness Pass Throughs2025-01-011805/05/2023
Abstract Improving the Sound Transmission Loss of Wire Harness Pass Throughs For years the NVH community has known that openings in the dash sheet metal, such as holes to pass wire harnesses through, create an acoustical weak point that limits the potential noise reduction of the dash insulation system. These pass throughs can also be a source of water leaks into the vehicle’s interior. With the combustible engine and now electric inverter power plants, the need to seal this area is vital. By molding a lightweight barrier that draws through the fiber/absorber interior decoupler and dash sheet metal which mates to a secondary seal molded into an outer engine dash decoupler, the two opposing molded barriers meet in the engine compartment and compress together forming a seal around the wire harness. This male/female molded seal replaces the conventional snap in grommet and eliminates noise/water leaks. The system Sound Transmission Loss (STL) is equivalent to similarly insulated sheet
Check, James, Moritz, Charles
A Comprehensive Evaluation of PU Foam for EV NVH Performance2025-01-012005/05/2023
Low density polyurethane foam was first proposed as an alternative to expandable baffles and tapes for sealing vehicle body cavities towards the end of the last century. In spite of several inherent advantages for cavity sealing, the high equipment cost of dispensing amongst other reasons, this technology has not spread as widely as expected. With the advent of electric vehicles, there is an increased emphasis on controlling higher frequencies from motors, inverters and other components, and polyurethane foam can be a viable solution by providing more robust sealing. Polyurethane foam sealing is already being employed in the new breed of electric vehicles but its NVH advantages have not been fully studied or published in literature. Using an existing electric vehicle with conventional expandable baffles & tape sealing measures, a comprehensive evaluation of NVH performance using the closed-cell polyurethane foam solution was carried out. Testing included component level bench test on
Kavarana, Farokh, Guertin, Bill, Braun, Arnold, Hand, Joshua, Thota, Manoj
Aerospace Fluid System Standards, Metric, National and InternationalAIR2000F (Current)03/25/2022
The purpose of this aerospace information report is to provide a listing of national and international metric standards for use in aerospace fluid systems with their equivalent SAE inch, International ISO, and European AECMA standards.
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Aerospace Fluid System Standards, Metric, National and InternationalAIR2000F-TEST-REC (Historical)03/25/2022
The purpose of this aerospace information report is to provide a listing of national and international metric standards for use in aerospace fluid systems with their equivalent SAE inch, International ISO, and European AECMA standards.
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
HYDROCARBON FUEL RESISTANT, TUBE FITTING, O-RING MOLDED FROM AMS-P-5315 RUBBERAS29512C (Current)11/09/2021
A-6C2 Seals Committee
Gland Design, O-Ring and Other SealsAS4716D (Current)11/09/2021
This SAE Aerospace Standard (AS) provides standardized gland (groove) design criteria and dimensions for O-ring seal glands for static and dynamic applications, and other seals.
A-6C2 Seals Committee
Gland Design, O-Ring and Other SealsAS4716D-TEST-REC (Historical)11/09/2021
This SAE Aerospace Standard (AS) provides standardized gland (groove) design criteria and dimensions for O-ring seal glands for static and dynamic applications, and other seals.
A-6C2 Seals Committee
O-RING MOLDED FROM AMS7276 MATERIALAS83248/1A (Current)11/08/2021
A-6C2 Seals Committee
Experimental investigation of thermal safety of the IC engine in the event of coolant loss2021-28-015210/01/2021
Power density (power/engine cubic capacity) of the latest passenger car Diesel and Gasoline engine keeps increasing with a focus to deliver best in class performance along with meeting CAFE and emission norms. This increase in power density increases the thermal load onto the coolant system. Coolant temperature sensor monitoring the coolant temperature, proper radiator sizing, optimum water pump flow capacity and thermostat tuned to the required coolant temperature range are the typical measures taken to ensure safe operation of the engine and avoid any over-heating. Typical cooling system failures are mostly due to low coolant level, a defective thermostat, non-operative water pump & fan and blockage in the coolant circuit, etc. Most of these failures can be detected with the help of coolant temperature sensor and pre-emptive measures can be taken to avoid engine loss. However, in the event of complete loss of coolant in the engine, the coolant temperature sensor will become
Sithick basha, Abubakker, NAMANI, Prasad, Sebastian, Ranjit George, Malekar, Amit, Vellandi, Vikraman
Investigation on Leakage issue in Air brake valve using Finite Element Method and Experimental Analysis2021-26-034909/22/2021
Braking system components generally are safety critical products. In particular commercial vehicles braking systems are of highly safety critical as they pose a serious threat to life and property. Therefore a system must be designed and validated to minimize the effects of component failure of these portfolios of products. In order to avoid accidents due to brake failures, this paper mainly focuses on analysis of loss of pneumatic fluid pressure in the components of the braking systems. Leakage of pneumatic fluid pressure through the sealing in braking system is one of the major reasons for the failure of the brakes in the vehicles. The aim of the present study is to optimize and avoid the leakage of braking fluid through sealing so as to ensure the proper response and functioning of the brakes. A finite element model is developed in Ansys Workbench to study the behavior of the sealing ring under assembling conditions. The analysis includes the mating parts dimensions and the sealing
Veereswaran, Rahulraj, T, Sukumar
FEA based methodology to optimize sealing performance in Fuel vapor emission valves2021-26-020309/22/2021
As per current global trends, low tailpipe and evaporative pollutant emissions is major focus area in automotive development. This has led to imposing stringent emission limits on both tailpipe and evaporative emission norms. In field of evaporative emissions, the fuel valves must meet zero-leak of fuel to canister requirement under different operating conditions. Corresponding sealing design iterations and evaluating the performance thru lab testing is time and cost consuming. Present study considers FEA based sealing analysis considering elastomeric-plastic interface using ANSYS. The designs are evaluated by comparing surface contact of seal with valve orifice. In present study, different combinations of shape, size of plastic and elastomeric parts, material stiffness, axis position of elastomeric & plastic parts and use of supporting structure for elastomeric parts are evaluated. A methodology is provided to optimize seal design to meet zero-leak of fuel requirement by using right
Pote, Mayur, Pethe, Anushri, Ostrosky, James, Mohite, Sanjay
Regulatory Norms and effect on transmission component validation2021-26-046009/22/2021
With the advent of BS VI regulations, automotive manufacturers are required to innovate the powertrains, fuel systems, exhaust and its after treatment systems to meet the regulatory requirements. The exhaust regulations can be met either by reducing the exhaust gases being generated by the engine (attacking the source) or by treating the exhaust gases in after treatment devices. The choice of the opted system varies with the manufacturer. The after-treatment devices such as catalytic converters are generally mounted in the engine compartment to take advantage of high temperature of exhaust gases to yield the reactions. Such an arrangement imposes a lot of thermal load on the peripheral components such as gearshift cables, bearings, oil seals, driveshafts etc. Thermal shields or thermal sleeve are used to address thermal issue and to protect transmission components. System level validation test requirement of transmission need to be re-visited to considering change in environmental
Tongaonkar, Yogesh Manohar, Patel, Hiral, Tendulkar, Vishveshvar, Bhosale, Vikas, halingale, Amol
Suitable Test Sizes for O-ring SpecificationsARP3050A (Current)09/08/2021
There are many tests that have been developed to characterize rubber O-rings. Many of these tests are independent of the size of the O-ring being tested. However, there are some tests, specifically, stress/strain properties, that are a function of the O-ring’s size. The purpose of this report is to provide guidelines for specifying O-rings that would be considered “suitable for testing” when writing O-ring material specifications.
AMS CE Elastomers Committee
Packing, Preformed (PTFE) - AMS3668, SealAS9956B (Current)08/19/2021
SCOPE IS UNAVAILABLE.
A-6C2 Seals Committee
FITTING ASSEMBLY, STRAIGHT, FEMALE FLARELESS, AXIALLY SWAGED, HYDRAULIC, UP TO 1500 PSIAS6118C08/16/2021
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
FITTING ASSEMBLY, TEE, AXIALLY SWAGED TO FEMALE FLARELESS ON THE RUN, FEMALE FLARELESS ON THE SIDE, HYDRAULIC, UP TO 1500 PSIAS6458B08/16/2021
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Minimum Standard for Portable Gaseous, Oxygen EquipmentAS1046C (Historical)08/11/2021
This standard is intended to apply to portable compressed gaseous oxygen equipment. When properly configured, this equipment is used either for the administration of supplemental oxygen, first aid oxygen or smoke protection to one or more occupants of either private or commercial transport aircraft. This standard is applicable to the following types of portable oxygen equipment: a Continuous flow 1 Pre-set 2 Adjustable 3 Automatic b Demand flow 1 Straight-demand 2 Diluter-demand 3 Pressure-demand c Combination continuous flow and demand flow.
A-10 Aircraft Oxygen Equipment Committee
PACKING, PREFORMED - AMS7276, ‘O’ RINGAS3209C (Current)08/03/2021
A-6C2 Seals Committee
CONNECTOR, RECEPTACLE, ELECTRIC THRU BULKHEAD, WALL MOUNTING FLANGE, SERIES I (CLASS E)AS31391 (Current)06/22/2021
AE-8C1 Connectors Committee
HIGH CONFORMANCE SEAL, TYPE I AND II STANDARD AND LOW PROFILEAS1895/23C (Historical)06/22/2021
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
SEAL, TYPE I AND II STANDARD AND LOW PROFILEAS1895/7H (Current)06/22/2021
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
CONNECTOR, RECEPTACLE, ELECTRIC THRU BULKHEAD, WALL MOUNTING FLANGE, SERIES I (CLASS E)AS31391-TEST-REC (Historical)06/22/2021
AE-8C1 Connectors Committee
Fitting End, Bulkhead Flared Tube, for Seal Ring, Standard Dimensions for, Design StandardAS1099D05/31/2021
No scope available.
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
CONTACT, ELECTRICAL CONNECTOR, CONCENTRIC TWINAX, PIN, SIZE 8 (FOR MIL-DTL-38999 SERIES I, III, AND IV CONNECTORS)AS39029/113C (Current)05/28/2021
AE-8C1 Connectors Committee
Fittings, 24 Degree Cone Flareless, Fluid Connection, 3000 psiAS18280H (Current)05/26/2021
This SAE Aerospace Standard (AS) establishes the requirements for 24 degree cone flareless fluid connection fittings and nuts, internally or externally swaged, preset, or welded sleeves for use in aircraft fluid systems at nominal operating pressures up to and including 3000 psi.
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Fittings, 24 Degree Cone Flareless, Fluid Connection, 3000 psiAS18280H-TEST-REC (Historical)05/26/2021
This SAE Aerospace Standard (AS) establishes the requirements for 24 degree cone flareless fluid connection fittings and nuts, internally or externally swaged, preset, or welded sleeves for use in aircraft fluid systems at nominal operating pressures up to and including 3000 psi.
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Hydraulic Pump Minimum Inlet Pressure TestARP6249 (Current)12/10/2020
This SAE Aerospace Recommended Practice (ARP) contains technical information for conducting and evaluating the minimum inlet pressure capability of axial piston pumps.
A-6C4 Power Sources Committee
Packing, Preformed - O-Ring Seal Standard Sizes and Size Codes, MetricMA2010A (Current)12/09/2020
A-6C2 Seals Committee
Retainers, (Backup Rings), Hydraulic and Pneumatic, Polytetrafluoroethylene Resin, Solid, Un-Cut, for Use in Static Glands to AS5857AS5861B (Historical)11/19/2020
This SAE Aerospace Standard (AS) specifies solid polytetrafluoroethylene (PTFE) retainers (backup rings) for use in static glands in accordance with AS5857. They are usually for use in hydraulic and pneumatic systems as anti-extrusion devices in conjunction with O-rings and other seals. NOTE: This specification includes material tests but does not include hydraulic or pneumatic performance tests.
A-6C2 Seals Committee
CONNECTOR ACCESSORIES, ELECTRICAL, STRAIN RELIEF, NONENVIRONMENTAL, SELF-LOCKING AND NON-SELF-LOCKING, STRAIGHT, CATEGORY 4B (FOR AS50151 CRIMP, AS95234, MIL-DTL-26482) SERIES 2, AS81703 SERIES 3, AND MIL-DTL-83723 SERIES III CONNECTORAS85049/52F (Current)11/19/2020
AE-8C1 Connectors Committee
Retainers, (Backup Rings), Hydraulic and Pneumatic, Polytetrafluoroethylene Resin, Solid, Un-Cut, for Use in Static Glands to AS5857AS5861B-TEST-REC (Historical)11/19/2020
This SAE Aerospace Standard (AS) specifies solid polytetrafluoroethylene (PTFE) retainers (backup rings) for use in static glands in accordance with AS5857. They are usually for use in hydraulic and pneumatic systems as anti-extrusion devices in conjunction with O-rings and other seals. NOTE: This specification includes material tests but does not include hydraulic or pneumatic performance tests.
A-6C2 Seals Committee
Retainers (Backup Rings), Hydraulic and Pneumatic, Polytetrafluoroethylene Resin, Single Turn, Scarf-Cut, For Use in AS5857 Static GlandsAS5860C (Current)11/09/2020
This SAE Aerospace Standard (AS) specifies scarf-cut polytetrafluoroethylene (PTFE) retainers (backup rings) for use in static glands in accordance with AS5857. They are usually for use in hydraulic and pneumatic systems as anti-extrusion devices in conjunction with O-rings and other seals.
A-6C2 Seals Committee
Retainers (Backup Rings), Hydraulic and Pneumatic, Polytetrafluoroethylene Resin, Single Turn, Scarf-Cut, For Use in AS5857 Static GlandsAS5860C-TEST-REC (Historical)11/09/2020
This SAE Aerospace Standard (AS) specifies scarf-cut polytetrafluoroethylene (PTFE) retainers (backup rings) for use in static glands in accordance with AS5857. They are usually for use in hydraulic and pneumatic systems as anti-extrusion devices in conjunction with O-rings and other seals.
A-6C2 Seals Committee
PACKING, PREFORMED, AMS7267, O-RINGAS9385A (Current)10/26/2020
Scope is unavailable.
A-6C2 Seals Committee
FITTINGS, TUBE, FLUID SYSTEMS, SEPARABLE, HIGH PRESSURE, DYNAMIC BEAM SEAL, DESIGN STANDARD FOR MALE ENDAS85720/1B (Current)10/19/2020
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Aerospace Size Standard for O-RingsAS568F (Current)09/29/2020
This SAE Aerospace Standard (AS) specifies the inside diameters, cross-sections, tolerances, and size identification codes (dash numbers) for O-rings used in sealing applications and for straight thread tube fitting boss gaskets. The dimensions and tolerances specified in this standard are suitable for any elastomeric material provided that suitable tooling is available.
A-6C2 Seals Committee
Technology for Obtaining Asymmetries of Stereometric Shapes of the Sealing Rings Sliding Surfaces for Selected Anti-Wear Coatings2020-01-222909/15/2020
The article presents the methodology of obtaining asymmetric shapes of the sealing rings sliding surfaces. A very high product tolerance of 1 to 3μm stereometric shape was taken into account for various types of wear-resistant materials that meet the requirements of adhesion of the anti-wear coating to the substrate. In particular, an analysis was made of the possibilities of using various product technologies, a modification of the grinder intended for profile grinding of the sliding surface of the rings was carried out, and the process of ring machining was determined. Maintaining the stereometric shape of the sealing rings sliding surface similar to the axisymmetrical model, with a product deviation of no more than a few micrometers, for any measuring section in the cross section on the periphery of the ring, gives the opportunity to verify the impact of this shape on the parameters of oil film and friction loss. Experimental tests were performed determining the product quality of
Wróblewski, Piotr
Numerical Analysis of the System Piston-Ring-Cylinder of an Automotive IC Engine2020-01-216009/15/2020
A set of piston rings is used to form a dynamic gas seal between the piston and cylinder wall. Many physical phenomena are associated with the operation of the system piston-ring-cylinder (PRC), such as: inter-ring gas dynamics for the labyrinth seal, hydrodynamic lubrication and mixed friction in gaps between the rings and cylinder liner, oil flow and distribution of lubricant along the liner, twist motion of rings, liner temperature influence on the oil viscosity. The first part of the paper presents a comprehensive model of the PRC system developed by the author. Among own models it includes several models taken from literature, like: a model of viscous oil flow between rough gap surfaces formulated by Patir & Cheng and an elastic contact model of Greenwood & Tripp. The main parts of developed mathematical model and software have been experimentally verified during a research period of the author at the marine engine designing centre ”Wärtsilä” in Switzerland. A relatively good
Wolff, Andrzej
Problems of Reducing Friction Losses of a Piston-Ring-Cylinder Configuration in a Combustion Piston Engine with an Increased Isochoric Pressure Gain2020-01-222709/15/2020
Currently, there is a tendency to increase the mean workable pressure in internal combustion engines, to reduce their cylinder volume and the number of cylinders in a balanced manner, depending on the vehicle's class and weight in order to improve the thermal and mechanical efficiency of the engine. An increased engine torque at a slight angular velocity results in an increase in the mean value of the unit pressure distribution of the piston rings, especially the upper sealing ring in the initial period of the expansion stroke, which limits the slip effect affecting the ability to form an oil film. The essence of validity of increasing the isochoric degree of pressure gain is the use of vehicles at low speeds with a high torque. Such selection of parameters ensures good motion dynamics at low fuel consumption. The use of sliding surfaces shape asymmetry significantly affects the course of the distribution of oil film on the cooperating working surfaces and the amount of oil scraped in
Wróblewski, Piotr, Iskra, Antoni
PACKING, PREFORMED - AMS3650, SEALAS9771A (Current)08/10/2020
SCOPE IS UNAVAILABLE.
A-6C2 Seals Committee
HOSE, AIR DUCT, FLEXIBLE, ANNULAR CONVOLUTED, SELF EXTINGUISHINGAS1505B (Current)06/09/2020
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
HOSE, AIR DUCT, FLEXIBLE, ANNULAR CONVOLUTED, SELF EXTINGUISHINGAS1505B-TEST-REC (Historical)06/09/2020
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
O-Ring Machined from AMS3668 MaterialAS9955B (Current)06/08/2020
This standard establishes the dimensional and visual quality requirements, lot requirements, and packaging and labeling requirements for O-rings machined from AMS3668 material. It shall be used for procurement purposes.
A-6C2 Seals Committee
O-Ring Machined from AMS3668 MaterialAS9955B-TEST-REC (Historical)06/08/2020
This standard establishes the dimensional and visual quality requirements, lot requirements, and packaging and labeling requirements for O-rings machined from AMS3668 material. It shall be used for procurement purposes.
A-6C2 Seals Committee
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