Rotating Unions For Paper & Pulp Industry

Rotating Unions For Paper & Pulp Industry


Deublin of USA manufactures rotating unions. For the paper industry an exclusive range of unions are specificall designed to meet the demanding requirements of high speed paper machines. It has been realised both in theory and in practice that stationary siphons function better at high speeds. So,the combination of stationary siphon and balanced sealing design has been incorporated for the unions designed for pape industry applications such as in high speed dryers, calendars, pope reels, and swing cylinders. The FS series unions have a stationary siphon with a pick up shoe which hydroplanes on a film of condensate preventing contact with the dryer shell. The balanced sealing arrangement, unlike the pressure joints, reduces the surface friction between seals significantly thus extending the lfie of the seals. These unions are available with bell support, bracket support and rod support. Common applications of FS Series unions are in swing cylinders and cooling cylinders. H Series unions come in self supported pressure joint design and can be used for steam as well as hot oil services. The self supporting design is accomplished by too widely spaced carbon graphite bearings ideal for open gear paper machines. The selection of carbon graphite as sealing material enables the union to withstand pressure surges and water hammering since carbon graphite is 4 times stronger in compression than in tension. GS Series features spherical mechanical seals. It makes the thrust load inserted by steam pressure being applied to the external support of the housing but not on the seal while lower pressure on the seal face reduces friction and torque and extends life of the seal. The GS Series unions are specifically designed for Yankee dryers. For hot oil applications at high speeds such as up to 850 RPM and pressure within 6 bar, the CK Series is offered. The unique sealing system utilises special seal materials to resist abrasion and to provide maximum heat dissipation. CK Series operates successfully at both elevated speeds and temperatures.

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