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The mud discharge valve, also known as the cover valve, is commonly used for discharging sludge at the bottom of the sedimentation tank of urban water plants and sewage treatment plants. The applicable medium for the mud discharge valve is the primary sewage. The temperature of the medium should generally be less than 50 ° C, and the working water depth is less than 10 meters. The mud discharge valve is also used in the water treatment plant as a sludge and waste water in the discharge tank. The mud valve is of angular structure and the inner nylon reinforced rubber diaphragm is used for long-term use of mud valve.
Low carbon USS flat washers, typically used with Grade 8 or hardened steel bolting, are used under bolt heads or nuts to increase the bearing surface area, or to offer protection so that the nut or bolt can be rotated without distortion of the bearing surface. Flat washers are also used to give tightness to a joint, to prevent leakage, and especially to distribute pressure under the head of a bolt or nut. Dimensional specifications are governed by ASME B18.21.1. USS (United States Standard) flat washers have a larger outer diameter than SAE (Society of Automotive Engineers) flat washers, and can be utilized in nearly any application. ASTM F844 covers the standard specifications for unhardened steel flat washers for general use. Available in zinc plated finish. Zinc plating sacrifices itself, corroding before the base material, offering added corrosion resistance.
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