Features
- Dry gas seal for multiphase pump applications
- DiamondFace sliding surface technology
- Ideal for applications with Ethane, CO2, and similar media with low vapor margins
- Shrouded rotating ring
- Bi-directional
- Ready-to-fit cartridge unit
- Single, double, tandem, and tandem with intermediate labyrinth available
Advantages
- DiamondFace sliding surface technology for maximum operational performance under multiphase process conditions (liquid, vapor, supercritical)
- Ideal upgrade solution for wet mechanical seals with dry running issues
- Simple set-up: seal gas heating and nitrogen buffer are not required
- Stiff sealing gap creates necessary heat and doesn´t require additional heating
- Significantly lower leakage rate avoids icing problems with CO2 (Joule Thomson effect) and keeps emission rate low
- High film stiffness in all operating modes
- Proven reliable and economical solution
- Adjustable to extreme narrow installation space – retrofits are easy to implement
Operating range
Shaft diameter:
D = 32 … 154 mm (1.26″ … 6.06″)
Pressure (static und dynamic):
DF-DGS6: p = 0 … 120 bar (1,450 PSI)
DF-PDGS6: p = 0 … 250 bar (3,625 PSI)
Temperature:
DF-DGS6: t = -46 °C … +150 °C
(-51 °F … +302 °F)
DF-PDGS6: t = -100 °C … +200 °C
(-148 °F … +392 °F)
Sliding velocity:
vg = 0,6 … 140 m/s (2 … 459 ft/s)
For applications outside the standardized operating range mentioned, please contact us.
Materials
Primary seat and seal face: Silicon carbide with DiamondFace technology
Secondary seat and seal face: Silicon carbide with DLC coating (optional: DiamondFace technology)
Secondary seals: FKM, FFKM, PTFE (DF-PDGS6). Other elastomers available, depending on product gas composition
Metal parts: 1.4006 (410) and other stainless steels