1 | Primary seal face with DF-coating*, stationary |
2 | Primary seat with DF-coating*, rotating |
3 | Thrust ring |
4 | Spring |
5 | Shaft sleeve and seat retainer |
6 | Intermediate sleeve |
7 | Housing (adapted in size to the installation space) |
8 | “Adjustable” nut for axial misalignment |
9 | Split ring |
10 | Clamping ring |
11 | Cover |
12 | Process side labyrinth |
GBI | Gas Buffer Inlet |
GBO | Gas Buffer Outlet |
D | Drain |
* | Optional: secondary seal face and seat also with DF-coating. |
Seal DF-P Features (HBDF-P)
- DiamondFace bonded primary seal faces
- Safe cupped retainer for rotating ring
- Bi-directional
- Ready-to-fit cartridge unit
- Single, double, tandem and tandem seal with intermediate labyrinth arrangement available
- An ideal solution for
- Ethane, CO2 and many other low vapor margin applications
- This type of seals can handle both liquid and gaseous phases during the operation of the pump
Seal DF-P Material
- Primary seat and seal face: Silicon carbide with DiamondFace bonding
- Secondary seat and seal face: Silicon carbide with DLC coating. Optional also with DF-coating
- Secondary seals: FKM, PTFE (DF-PDGS6) or other elastomers, depending on product gas composition
- Metal parts: 1.4006 (410) and other stainless steels
Seal DF-P Advantages (HBDF-P)
- Significantly lower leakage rate compared to competition
- Longer life span
- Wear and contact free operation
- Self-cleaning 3-D gas grooves
- High gas film stiffness
- Proven, reliable and economical solution
- Can be adjusted even to extreme narrow installation space – retrofits are easy to implement
Seal DF-P Recommended applications
Oil and gas industry
Refining technology
Petrochemical industry
Hydrocarbon applications
CO2 applications