Vessel and Agitator Seals | Heavy-duty Cartridge Seal for Boiler Feed Circuit Applications
Features mechanical seal type ck738
- California Residents: PROPOSITION 65 WARNING
- Dual-cartridge seal to DIN 28138 to fit glass-lined vessels.
- Fits mounting flange to DIN 28137-2 and shaft ending to DIN 28159.
- Back-to-back seal arrangement with balanced faces.
- Reversed pressure capabilities inboard.
- Special designs and material options on request.
- Available in four variants of lubrication system:
– W — liquid-lubricated wet seal
– D — dry-running contacting seal
– G — gas-lubricated non-contacting seal
– GD — gas-lubricated non-contacting inboard, dry-running outboard
About Mechanical seal type ck738
Type CK 738 is a versatile, high-performance cartridge seal solution for glass-lined vessels applicable in various industries, including high-purity pharmaceutical applications. High-end materials, balanced faces and a thrust bearing, in combination with a special sleeve design, secure stability of the seal settings and proper operation even in heavy-duty environments. Type CK 738 is available in liquid-lubricated (W), gas-lubricated (G), dry-running (D) or with a unique gas/dry face combination (GD). Advantages of contacting dry-running seals include freedom from contamination by barrier liquid and a low face wear rate, together with a cost-efficient, easy-to-install (gas) supply system. Advantages of gas-lubricated versions (G, GD) include the non-contacting, wear- and particle-free operation in addition, which makes these seals the perfect solution for high-end pharmaceutical applications. The GD design reduces the overall barrier gas consumption compared to G version.
The special modular design ensures maximum application flexibility through interchangeable sealing components. The standard cartridge design is available to fit on top-entry, steel agitator vessels to DIN 28136, with mounting flange to DIN 28137-2 and agitator shaft end dimensions to DIN 28159. Modifications of adaptive hardware to fit non-DIN mixers or special equipment are available on request. Components are standardized with seal Type CK 728 for steel vessels.
Design Features mechanical seal type ck738
- Dual cartridge seal to DIN 28138 for glass lined vessels• Fits mounting flange to DIN 28137-2 and shaft end dimensions to DIN 28159
- Back-to-back seal arrangement with balanced faces
- Reverse pressure capabilities inboard
- Available in four variants of the lubrication system:
– CK738 W – Liquid lubricated wet seal
– CK738 D – Dry running contacting seal
– CK738 G – Gas lubricated non-contacting seal
– CK738 GD – Gas lubricated non-contacting inboard, Dry running outboard
- Special bearing design for high performance of non-contacting gas seals
- Special PTFE-based secondary sealing elements support a broad chemical and temperature application range
- Special carbon materials allow for exceptional operation with dry barrier gas without an external humidifier
- Special designs and material options available on request
- Cooling flange or cooling jacket available on request
- G design advantages include wear-free and particle-free operation, together with an easy supply system. In addition, the GD design reduces barrier gas consumption
Recommended Applications type ck738
- Mixer and agitators
- Other rotating equipment
Operating range mechanical seal type ck738
-40°F to 392°F/-40°C to 200°C (-148°F/-100°C modified)
Vacuum to 25 bar(g)
Dry-running variants up to 16 bar(g)
Non-contacting gas seals up to 10 bar(g)
40mm to 160mm
Product Description type ck738
The Type CK 738 vessel seal range is the high performance DIN cartridge solution for glass lined vessels. The special modular design ensures maximum application flexibility through
interchangeable sealing components. The cartridge design is standardised to fit on top entry, glass lined agitator vessels to DIN 28136, with mounting flange to DIN 28137-2 and agitator shaft
end dimensions to DIN 28159. Modifications to fit non-standardised equipment are also possible.
All versions are suitable for operation in potentially explosive atmospheres. Depending on individual explosion protection requirements, the seal operating limits may differ from the values given in this data sheet. Consult John Crane for more information.