John Crane has published details of its new Type 2800X non-contacting dual seals in a new brochure that outlines their particular suitability to large-bore, non-turbo rotating equipment applications. The brochure also covers the patented new technology that allows the Type 2800X seals to provide environmentally friendly and emission-free sealing. The 2800X seals are intended for use in many different performance-critical applications. These include the contamination-free processing of extremely pure materials, the use of reactive or temperature-sensitive media where local process “hot spots” can cause unwanted chemical reactions, cold applications such as ammonia processing, and air/oxygen-sensitive processes where unwanted oxidation reactions could occur. The environmentally-friendly operating characteristics of the new seals are also emphasised in the new publication, which describes how a reverse pressure capability ensures that if the barrier gas fails, the process pressure closes the seal faces and prevents any large-scale loss of process fluid to atmosphere. Both standard and optional construction materials are explained along with the ability of the patented 2800X design to accommodate both lower and higher speeds and pressures than similar seals.