W4/D (DN220-DN500)

The W4/D round pressure manway is manufactured from stainless steel in AISI 304L (1.4307) grade, as well as AISI 316L (1.4404) for applications requiring greater resistance to environmental factors. The ranges of available sizes from DN220 to DN500, together with the pressure parameters, affect the ease of selection depending on the size of the tank.

The standard gaskets used in the manway are made of EPDM, however, other optional gasket materials significantly expand the spectrum of applications for the manway.

The lid of the W4/D manway is closed by means of handwheels equipped with a specially shaped pressing element, which fits directly to the rim. Thanks to this, the manway keeps its tightness, and the process of closing and opening is fast and safe. 

This solution is particularly recommended for applications where the speed and ease of opening of the manway cover plays a primary role. 

The bolts of the handwheels are attached to the flange (frame) of the manway using solid pin closures. 

This solution guarantees both the high strength of each manway closure and the ease and speed of replacing these components in the future. 

The convex shape of the cover and the polishing of its surface are designed to reduce the adhesion of dirt, and help liquids drain freely.

This advantage should be especially appreciated by those users who are forced to frequently clean process lines in order to maintain high hygienic standards. 

The whole is completed by a hinge responsible for stabilizing the lid during opening and closing, as well as a handle to make this process easier.