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Process Equipment Update


stem which makes actuation more costly and in service use more difficult. To counter this, Fluorocarbon has introduced new Stem


Seals to solve high torque problems on gate and choke valves. The Stem Seal criteria was to design a seal that could give long term assured sealing at high pressures over a wide temperature range, be suitable in any media, significantly reduce valve torque and give a greater than 20 year life. The careful selection of materials and consideration to


design has allowed Fluorocarbon to meet these criteria at a price which remains competitive compared to traditional solutions whilst increasing reliability. The new Fluorocarbon Stem Seal is the preferred choice


for a number of leading international valve manufacturers which differentiates their product over manufacturers still using traditional sealing methods. Valves using the Stem Seal can meet the following criteria: temperatures from -100°C to 250°C (cryogenic is available too); pressure - 15,000 psi cyclic, 22,500 psi static; and torque reductions from over 300 ft lbs to less than 100ft lbs. Fluorocarbon says that at present the new seals are mainly


being used in gate, choke and ball valves, although it can adapt designs to suit most applications and sizes.


Thermal stability


New from Klinger, the KLINGERSIL C-4430 Plus is a universal sealing material suitable for a large number of fluids. As it is compatible with water, steam, hydrocarbons, oil, light acids and light bases, the company says it is ideal for a wide range of applications. The most important feature of the new KLINGERSIL


C-4430 plus is its high temperature heat resistant NBR matrix, which is used as binder. This new technology has been used for the first time with KLINGER Quantum. It provides scope for improvements of several key characteristics, which have all been verified in numerous standardised tests. One of these is for thermal stability. Here KLINGERSIL


C-4430 Plus benefits from the new cross-link technology and now features considerably higher stability. This results in the greatest heat resistance ever. According to Klinger, the maximum temperature is 50°C higher than those of other


materials, and allows higher process temperatures. Another test was on product life time. Usually, elastomers


used for sealing materials deteriorate over time. Periodical replacement is absolutely essential to sustain safe operation. But the extended lifetime of KLINGERSIL C-4430 Plus, on the other hand, makes longer service intervals and reduced service costs possible. The seal has almost met a raft of safety and temperature


tightness guidelines. “Thanks to the high temperature heat resistance, KLINGERSIL C-4430 Plus is suitable for even very demanding situations. Due to the compatibility with numerous fluids and the large number of approvals it also covers a wide range of applications,” notes the company. Among a host of innovative products available from


Garlock Sealing Technologies (GST) are ultra high temperature gasket materials such as THERMa-PUR. These new materials were developed from the ground up, using new materials and with numerous patents applied for. For over three years, the company worked closely with many customers, carrying out over 2000 beta tests in many different processing industries and locations. In terms of THERMa-PUR, it is a blended proprietary


material that is designed for temperatures up to 1000°C (Fig. 1). Markets for this include process drying equipment, mineral and fertiliser processing, oil and gas production and co-generation systems.


Renaming


In January, specialised sealing solutions company FDS Group was renamed The Flexitallic Group. The move comes in response to the expanding global presence, recognition and value of Flexitallic, one of the Group’s premier operating companies. Over the course of the next 18 months, more operating units will also adopt the Flexitallic master brand. “While each operating company has its unique strengths,


we’re now collaborating as a global enterprise for the increased benefit of our customers,” said Remi Toledano, president and ceo. “Our shared focus on developing products and solutions that deliver uncompromising safety will be a hallmark against which the Flexitallic brand will continue to grow.” ●


Seal standardisation strategy saves money F


lowserve Corporation is continuing with the global promotion of its ‘Innovative Standard Cartridge’ seal series – the


ISC2. Well received by customers in the North American process industries, the company is expanding its promotion of the product into all other global regions. Facilities that standardise with the ISC2 seal can benefit from reduced inventory, greater application flexibility, rapid availability, less downtime and longer seal life, resulting in an overall cost reduction. Designed to fit a wide range of pump designs and configurations, ISC2 seals feature


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an exclusive, patented thermal management technology which tolerates short-term dry run events without overheating, thereby increasing reliability and preventing a common cause of leakage.


ISC2 dual seals employ enhanced barrier fluid circulation for the highest flow rate and coolest running when compared to other standard cartridge seals. ISC2 single seals have a sizeable throttle bushing to help protect against leaks. “Flowserve is an industry leader in the design, production and service of mechanical seals and support systems for pumps and other rotating equipment,” said Ken Lavelle, president, seal


operations. “The ISC2 seal offers our customers maximum performance and reliability in a variety of industries and applications and demonstrates our continuing technology leadership and commitment to provide our customers with products and services that meet or exceed their requirements. In fact, this innovative seal design is so versatile, it may be the only pump seal required by some facilities.”


Flowserve mechanical seals are designed to prevent the leakage of potentially hazardous process fluids, providing environmentally- conscious companies improved reliability and extended mean time between repair. ●


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