Easy Gasket – innovative sealing system for screw conveyors

The gaskets used to protect the drive and bearing systems of screw conveyors while preventing the escape of bulk material are subject to lots of wear and tear. The new Easy Gasket system by SHA GmbH provides a revolutionary, reliable solution to that problem and even keeps the shaft journal from wearing down at the same time.

In the Easy Gasket system engineered by SHA in cooperation with producer Cinch Seal, the seal face, as the major sealing surface, is not situated between the shaft journal and the gasket, but between a pair of rotor cups comprising chemically linked PTFE rings and a hardened aluminium housing. Within the housing, the seal elements are subject to compression generated by an elastomer rubber boot mounted firmly on the shaft journal. Force of compression ensures that the rubber boot riding the shaft applies sufficient surface pressure to the rotor cups in the aluminium housing to keep them in a state of floating rotation. By means of air compression, a defined pressure pushes the rotor cups up against the housing to yield a liquid-tight zero gap. Following an initial running-in time of 2 or 3 operating hours, no measurable amount of air is consumed.

For nearly two years now, SHA GmbH has been using these gaskets as a standard seal solution with the following main merits: no abrasion of the shaft journal, unimpeded linear expansion of the shaft, no gasket damage due to radial motion (rotating unbalance) of the shaft, no need for gas purging, no lubricants required, no bulk material contamination, longer service life, lower operating and maintenance costs and, of course, higher availability.

//" target="_blank" >


Related articles:

Issue 01/2009 Process Know-how

Extraction characteristics of bulk materials from silos

Part 1: Basic experimental and theoretical principles

1 Introduction Silos have been used for centuries for storing bulk materials. It is important not only that the required quantity of bulk ma­terial can be stored in a silo but also that it can be...

Issue 12/2011

The tubular weigher WeighTUBE® – the innovative bulk material dosing system

1 Alternative fuels for the cement industry Particularly in the cement industry, recent years have seen the replacement of conventional fossil fuels with alternative fuels. Aside from biomass, sewage...

Issue 10/2010

IBAU Screw pump made in India

The first IBAU screw pump produced in India has recently been delivered to its Indian cement customer and will be put into operation shortly. This delivery marks a further milestone in the young...

Issue 6/2022 BEUMER GROUP

Beumer Group supplies individual single-source solutions with regard to the handling of alternative fuels

Cement is the most commonly used building material worldwide, and is continuously growing. However, manufacturers have to comply with ever stricter environmental regulations in order to get air...

Issue 02/2009 Process Know-how

Extraction characteristics of bulk materials from silos Part 2: Experimental results

Part 2: Experimental results

4 Test results The test results for test series 1 and 4 are given below (Table 1; part 1). A complete evaluation can be found in [18]. 4.1 Flow profiles Knowledge of the flow profiles is very...