O-Ring Size Chart Parker A Comprehensive Guide to O-Ring Sizing and Selection
O-rings are a fundamental component of many industrial and consumer products, serving as a sealant against air or fluid pressure. They are commonly used in pumps, valves, cylinders, and many other applications. However, with so many different sizes and materials available, selecting the right O-ring can be a daunting task. We will provide a comprehensive guide to O-ring sizing and selection, with a specific focus on the O-ring size chart Parker.
Understanding O-Ring Sizes:
O-rings are circular in shape and typically made of rubber or other elastomers. The size of an Oring is determined by its inner diameter (ID) and cross-sectional diameter (CS). These dimensions are expressed in either inches or millimeters.
• ID and CS Sizing
The ID of an O-ring is the measurement of the inside diameter of the ring, and the CS is the measurement of the thickness of the ring. O-Ring Size Chart Parker is commonly measured in fractions of an inch or millimeters, with the most common sizes ranging from 1/32 of an inch to over 25 inches in diameter.
• Standard O-Ring Sizes
There are many standard sizes of O-rings available, and they are typically identified by their AS568 size number. The AS568 size system is used in the United States and is recognized internationally as well. The AS568 standard includes 369 sizes of O-rings, ranging in size from 1/32 of an inch to 26 inches in diameter. These sizes are designated by a three-digit number, with the first two digits indicating the O-ring ID in sixteenths of an inch, and the last digit indicating the CS in sixteenths of an inch.
Selecting the Right O-Ring:
Selecting the right O-ring is crucial to ensure a tight seal and prevent leaks. When selecting an Oring, it is important to consider factors such as temperature, pressure, and compatibility with the fluid or gas being sealed.
• Temperature
O-rings are designed to operate within a specific temperature range. If the temperature exceeds the recommended range, the O-ring may become brittle, harden, or soften, which can lead to failure. It is important to select an O-ring that is suitable for the intended temperature range.
• Pressure
The pressure exerted on an O-ring can also affect its performance. As pressure increases, the Oring may compress, which can reduce the sealing force and cause leaks. It is important to select an O-ring that is designed to handle the intended pressure range.
• Fluid or Gas Compatibility
The material of the O-ring must be compatible with the fluid or gas being sealed. Certain fluids or gases can degrade or attack certain materials, leading to premature failure. It is important to select an O-ring material that is resistant to the intended fluid or gas.
Materials Used for O-Rings:
O-rings can be made from a variety of materials, each with its own unique properties and advantages. The most common materials used for O-rings include:
• Nitrile Rubber (NBR)
Nitrile rubber is a synthetic rubber that is resistant to oil, fuel, and other petroleum-based products. It is also resistant to water and air, making it a versatile material for O-rings. Nitrile rubber is commonly used in automotive and industrial applications.
• Fluorocarbon Rubber (FKM)
Fluorocarbon rubber, also known as Viton®, is a synthetic rubber that is highly resistant to heat, chemicals, and ozone. It is commonly used in high-temperature and high-pressure applications, such as aerospace, and automotive
Materials Used for O-Ring:
• Ethylene Propylene Rubber (EPDM)
Ethylene propylene rubber is a synthetic rubber that is resistant to weathering, ozone, and aging. It is also resistant to water, steam, and chemicals, making it a good choice for outdoor and industrial applications.
• Silicone Rubber (VMQ)
Silicone rubber is a synthetic rubber that is highly resistant to extreme temperatures, from -60°C to 230°C. It is also resistant to aging, ozone, and chemicals. Silicone rubber is commonly used in food and medical applications.
• Polyurethane (PU)
Polyurethane is a thermoplastic material that is highly resistant to wear, abrasion, and chemicals. It is commonly used in hydraulic and pneumatic applications.
O-Ring Size Chart Parker:
Parker Hannifin Corporation is a leading manufacturer of motion and control technologies, including O-rings. The Parker O-ring size chart includes a wide range of sizes, from miniature Orings with an ID as small as 0.5mm, to large O-rings with an ID up to 500mm.
• Parker AS568 O-Ring Size Chart
The Parker AS568 O-ring size chart includes 369 standard sizes of O-rings, ranging in size from 0.029 inches to 26 inches in diameter. The chart includes both imperial and metric sizes, making it easy to find the right size for your application.
• Parker O-Ring Material Guide
In addition to the size chart, Parker provides a comprehensive O-ring material guide that includes information on the chemical compatibility, temperature range, and other properties of each material. This guide can help you select the right material for your application.
Conclusion:
Selecting the right O-Ring Size Chart Parker crucial for ensuring a tight seal and preventing leaks in industrial and consumer products. The O-ring size chart Parker provides a comprehensive guide to O-ring sizing and selection, with a wide range of sizes and materials to choose from. When selecting an O-ring, it is important to consider factors such as temperature, pressure, and compatibility with the fluid or gas being sealed.