Autotrol Ball Backwash and Brine Refill Control (4f)
This metric O-Ring set is made of Black Buna-N, has a durometer of 70A, and includes 401 pieces covering 32 dash sizes. The rings have a Round cross-section and can be used across a wide temperature range from -40 degrees F (-40 degrees C) to 212 degrees F (100 degrees C). The rings come in a plastic storage case designed for organization and portability.
The set includes the following O-Rings: 38 pieces for metric size (cross section x inside diameter) 1×3; 9 pieces for 2×5; 17 pieces for 1×4, 2×6, 2×8, 2×10, 2×11, 2×12, 2×14, 2×17, 2×20; 12 pieces for 3×10, 3×12, 3×16, 3×18, 3×22; 9 pieces for 4×20, 4×22, 4×24, 4×25, 4×30, 4×34, 4×36, 4×40, 4×45, 4×47, 4×50; 7 pieces for 5×16, 5×25, 5×25, 5×30, 5×32, 5×35.
Buna-nitrile can have high tensile strength, as well as abrasion, tear, and compression set resistance. It is compatible for use with petroleum, hexafluoroacetone (HFA), hexafluoro-2-butyne (HFB) and hydrofluorocarbon (HFC) fluids, vegetable oil, alcohol, acids, and aliphatic hydrocarbons. Buna-nitrile is vulnerable to acetone, ethers, esters, ozone, sunlight and weathering, and should not be used in ozone-generating electric motors, welding equipment, or in applications with exposure to UV light.
The durometer hardness of this Buna-N O-Ring is 70A. Durometers measure the hardness of a material and its resistance to permanent indentation. A higher durometer value indicates greater resistance to indentation. On a scale of 0 to 100, a value of 0 indicates that a sample was completely penetrated, while a value of 100 shows no indentation in the sample. The letter following the number identifies the shore scale, which is either shore A or D. Shore A is used for rubber, while shore D is used for harder plastics.
O-rings provide a pressure and fluid seal between cylindrically shaped, overlapping mating surfaces and are commonly seen in engines, faucets, flanges, valves, and various cylinders. They are circular in shape, with a round cross section, and a hole in the center, similar to a doughnut. O-rings are available in various AS568A dash sizes as well as Metric sizes. O-ring size is defined by the inside diameter (ID), outisde diameter (OD), and cross-sectional (CS) diameter.
