Repair Care International DRY SEAL® Replacement Putty Elastic Glazing Sealant White

Product Information

All these factors—seal design, process and separation seal, seal configurations, dry gas seal panels and auxiliary systems—must be reviewed, assessed and designed for the seal’s intended application. With strict adherence to these guidelines, a dry gas seal system can be designed that offers the highest efficiency and reliability, preventing unnecessary plant shutdowns and subsequent loss of production and catalysts. This makes Dry Seals a far superior option to using a wet seals solution. A wet seal solution to filling joints is enormously damaging to our environment as the amount of waste material generated worldwide is only adding to the severe global epidemic our planet earth is already facing due to the amount of plastic waste mankind is already generating.

A well-known reason for dry gas seal failure (or problem) is dirt (such as dust or contamination) or liquid finding its way to the seal — whether through seal gas or from the inside of the compressor. Dust or contamination inside seal components could potentially cause "hang-up" of the static faces, which might show itself as high seal gas flows at the primary vent. Because dry gas seals operate under extreme conditions, choosing the right seal features can substantially increase the reliability by ensuring that they maintain a gap between the rotating seat and the stationary face. To understand this, let’s start with the basic principles of a dry gas seal (Figure 1). Sometimes the differential pressure is higher than normally designed differential pressure, thus indicating a higher flowrate than designed; as noted it could result in inefficient performance or a malfunction. Often the differential pressure is lower than the designed value, which could be as a result of wear in the inner labyrinth seal.Before a water repellent impregnation is carried out, crusts of dirt and pollutants as well as efflorescence, algae and moss must be removed by a suitable cleaning procedure. Cleaning opens the pores and capillaries, allowing them to absorb the impregnation agent. However, where sprayed, items such as windows and surfaces which are (or will be) varnished or painted, as well as plants, should be covered with Polythene Sheets. Our Glass Protection Film is ideal use on windows. Large numbers of dry gas seal assemblies have problems because of an issue with an O-ring or a V-ring. There are many sealing elements (O-rings, V-rings, U-rings, etc.) in a seal assembly, which can cause seal operational problems. If an O-ring or a V-ring allows gas to bypass, the gas stream would pass up the primary vent. In many cases, the deterioration of a ring or a sealing element may explain the rise in the primary vent flow, which could be confused with seal face deterioration.

To prevent a dangerous condition, process gas cannot leak into the bearing cavity, which could cause an explosion or expose operators or the environment to hazardous or toxic gas. To eliminate this danger, a separation seal (Figure 2) is used on the atmospheric side of the dry gas seal. Since a number of separation seals are available, selecting the correct seal for the application is important. The quality of the seal supply gas must also be assessed to ensure that no liquids are formed during changes in gas pressure and temperature. The seal gas will drop in pressure from the supply pressure all the way to the atmospheric side as it leaks through the dry gas seal. Factors that can influence seal gas temperature are process gas temperature or environmental conditions, which can drop the temperature of pipes or the compressor to the point that liquid will form in the seal gas supply. All these conditions must be identified to ensure that no liquids form that will affect the operation of the dry gas seal during dynamic as well as static conditions.When using the product as a sealant, make sure that application results in a good bond between Dry Seal MP and the substrate.

The following points shall be thoroughly analyzed prior to the replacement of Liquid seals with DGS.The range of Dry Seals is specified for powdered or scarcely lubricated products, applications that are not possible to work with secondary cooling or lubricating fluids due to the peculiarities of the materials of sealing, such as all those related to food. Typically, compressors with dry gas seals are used in applications in which they are critical parts of the entire process. A well-designed dry gas seal system will prevent extensive damage to the dry gas seal, compressor and process. Compared to pump operations, dry gas seals and compressors usually operate at higher speeds and pressures. Every component of a dry gas seal must be designed to manage exposure to extreme conditions. This effect should not be confused with the "beading" effect often associated with water repellents. Available utilities can affect which seal configuration is used. Other aspects to consider include: Dry Seals adapt to all kind of equipments thanks to a floating design of the flange, helping to easily assemble to a bearing to simplify the system.

The first dry gas seal for a compressor was patented by Kaydon Ring & Seal in 1951 when it was known as Koppers Corporation. Field applications of dry gas seal designs were completed in 1952. The original patent was for Kaydon's "Tapered Ramp" lift geometry, a constant diameter / variable depth dynamic lift design. From that first dry gas seal ever manufactured for a centrifugal compressor in 1951, Kaydon Ring & Seal has been instrumental in developing the dry gas seal into one of the most reliable and maintenance free sealing solution available today.

Identifying Auxiliary Systems 

Compatible with double-glazed sealed units, all glazing tapes and with laminated, acoustic and safety glass Other systems for working with dusty fluids are air barriers, but they must be constantly supplied with compressed air to keep the product “fluid” away from the sealing area and this incurs high operating costs. On the contrary, Dry seals use a compressed air line to function correctly, but they do not need to consume its flow, which means there is no airflow through the seal and the seal does not become worn.