For the best selection of essential components for industry, Daemar Inc. has carved out a unique notch for itself. This unsurpassed lineup includes options for retaining applications, from tapered and spiral retaining rings to wave springs, constant sections, and three categories of disc springs – ideal for windmills, actuators, and ball valves.
These disc springs are available in multiple sizes for various tasks, and they all meet the most stringent European quality and safety standards.
Zinc phosphating and oiling
The DIN Metric group is a standard line of disc springs, a series that consists of 254 models in 246 sizes, with outer diameters running from six to 250 millimetres (mm) and inner diameters from 3.2 to 127 mm. These units are made of Ck67 and 50 CrV 4, and they have a standard corrosion protection of zinc phosphating and oiling. Disc springs that are at least ½ a millimetre thick are shot-peened to boost their fatigue. Bolt sizes range from three to 125 mm.
Another series of disc springs available is the DIN 6796 line of Belleville washers. These solutions are intended for pre-loading bolts, but not for applications involving dynamic loads. Also known as conical washers, Daemar’s heavy-duty Belleville washers are built from the same material from which the DIN Metric group is. Their bolt sizes go from two to 30 mm, while outer diameters range from five to 69.85 mm, and inside diameters range from 2.21 to 30.99 mm.
DMR Belleville disc springs create high loads when they are deflected to their flat positions; this deflection significantly reduces the spring rate of the bolted system, which in turn lowers the change in the bolt’s pre-load and prevents leaks through the joint. The DMR Belleville series is most recommended for live loading of flange joints and valve steam packing gland applications. The variations include springs with bolt stress of 30,000, 45,000, or 60,000 pounds and springs wit PH 17-7 PH material.
In addition to standard models, customized disc springs are available for specific tasks, all of them being pre-assembled in stacks or on guiding devices.
To learn more, contact Daemar.