Res-Kem is a leading supplier of elliptical yoke and bolt manways for personnel access to pressure vessels. Res-Kem offers various sizes of these complete manhole assemblies or tank manhole covers, which can be used for industrial and commercial water treatment applications. They are the following:
Most of the manway requests we receive from callers are for replacement cover assemblies, or top assemblies. A top assembly consists of a cover, (2) yokes, (2) nuts & bolts and a gasket.
We can also provide complete manway assemblies, which include all of the above, and the tank-welding ring. Tank welding rings, which are known as the tank opening, are 3/4" or 1" thick, with depths of 3", 4", 5" or 6". Typically, our customers specify the ring dimension. We can offer some assistance on the ring depth if we are given information on the tank shell diameter, and the thickness of either the shell or head.
When it comes to replacing an elliptical manway on an existing tank, the most important aspect is to provide the inside dimensions of the tank opening (which is the welding ring), so Res-Kem can properly quote the correct size cover. Measuring the depth of the opening will help us determine the correct length of the bolts that are needed. For example, if an opening measures 4" in depth, we will offer a bolt length 1" longer than the depth of the opening if the size of the manway is 11x15, 12x16, or 14x18. If the manway is an 18x24 size, we will offer a bolt length 2" longer than the depth.
We offer manways made of carbon steel, 304 stainless steel and 316 stainless steel. They come standard with a neoprene gasket rated for a max temperature of 170 ° Fahrenheit, or we can provide gaskets rated for temperatures over 500 ° Fahrenheit.
Posted on January 12, 2012 by Brian Krummel | Tags: Elliptical Bolt and Yoke Manways