The revolutionary seal with lowest barrier gas consumption Relyonexcellence

CobaSealGas-lubricatedoilbarrierseal

CobaSeal

CobaSeal, the oil barrier/separation seal for Dry Gas Seals, is a co-axial gas lubricated seal, which eliminates all disadvantages of existing systems such as labyrinths used currently in the industry.

The seal is designed similarly to a gas seal, consisting of a ductile rotating seat and a stationary spring-loaded seal face. In contrast to conventional mechanical seal systems, the separation gas is led through the stationary seal face into the middle of the sliding face by means of axial bores. The separation gas is divided into two leakage streams, towards the inside and the outside diameter of the sliding face. The coaxial seal is a dual system which is integrated in one sealing stage. The aerostatic lift-off results in a contact-free operation without any wear.

Innovative design combined with state-of-the-art face material features unbeatable low separation gas consumption while ensuring reliable operation. There are no restrictions whatsoever with regards to “slow roll”, “turning gear” and “coast down” operation. Due to the stable sealing gap between rotating seat and stationary seal face, a contact-free operation is ensured even in case of equipment upsets, e.g. vibrations

Features• Gas-lubricated • Bi-directional • Aerostatic lift-off• Ready-to-fit cartridge unit

Item Description1 Seal face, stationary2 Seat, rotating3 Thrust ring4 Spring5 Shaft sleeve and seat retainer6 Housing (adapted in size to the installation space)7 Oil slinger ringD Separation gas

OperatingrangeShaft diameter: 29.5 ... 159.5 mm (1.16" ... 6.280")Pressure: (vent) p = 0 … 10 bar (0 ... 145 PSI)Temperature: t = -20 °C … +50 °C (-4 °F … +122 °F) *Sliding velocity: vg = 0 ... 150 m/s (0 ... 492 ft/s)

* Separation gas

Materials Seal face: Silicon carbide (Q1) *Seat: Ductile stainless steel *Secondary seals: FKM (V)Metal parts: 1.4006

* With special EagleBurgmann high performance DLC (Diamond-Like-Carbon) coating

StandardsandapprovalsNACE

Coba Seal © EagleBurgmann

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Piping and instrumentation diagram of a CobaSeal (pressure controlled separating gas supply). Alternative solution: Differential pressure control for safe regulation of the separating gas pressure in any operating condition.

Recommendedapplications• Oil and gas industry • Refining technology • Petrochemical industry • Nitrogen • Air • Centrifugal compressors • Blowers

Importantnote

All the technical specifications are based on extensive tests and our many years of experience. However, the diversity of possible applications means that they can serve as guide values only. It should be noted that the extremal values of each operating parameter cannot be applied at the same time because of their interaction. Furthermore, the operating range of each specific product depends on the respective shaft diameter, materials used, mode of operation and on the medium to be sealed. A guarantee can only be given in the individual case if the exact conditions of application are known and these are confirmed in a special agreement. When critical conditions of operation are involved, we recommend consulting with our specialist engineers.

Subject to change.

DimensionsinmmDN DSmax. d1 d2 l50 29.5 47 98 31 55 34.5 52 103 31 60 39.5 57 108 31 65 44.5 62 113 31 70 49.5 67 118 31 75 54.5 72 123 31 80 59.5 77 128 31 85 64.5 82 133 31 90 69.5 87 138 31 95 74.5 92 143 32 100 79.5 97 148 32 105 84.5 102 153 32 110 89.5 107 158 33 115 94.5 112 163 32 120 99.5 117 168 33 130 109.5 127 178 32 135 114.5 132 183 33 140 119.5 137 188 33 150 129.5 147 198 33 160 139.5 156 208 37 170 149.5 166 222 37 180 159.5 176 232 37

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EagleBurgmann Germany GmbH & Co. KG Aeussere Sauerlacher Strasse 6–10 82515 Wolfratshausen Phone +49 (0)8171 23 0 Fax +49 (0)8171 23 12 14 info@de.eagleburgmann.comwww.eagleburgmann.com

EagleBurgmann is one of the internationally leading companies for industrial sealing technology. Our products are used everywhere where safety and reliability are important: in the oil and gas industry, refi ning technology, the petrochemical, chemical and pharmaceutical industries, food processing, energy, water, mining, pulp & paper, aerospace and many other spheres. Every day, more than 6,000 employees contribute their ideas, solutions and commitment towards ensuring that customers all over the world can rely on our seals. Our modular TotalSealCare service underlines our strong customer orientation and offers tailor-made services for every application.

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