Mechanical Seal DF-P

Type in the H-Brinker HBDF-P

DF-P Operating range

Shaft diameter: D = 32 … 154 mm (1.26″ … 6.06″)
Pressure (static and dynamic): p = 0 … 120 bar (1,450 PSI)
with PTFE option: 0 … 250 bar (3,625 PSI)
Temperature: t = -20 °C … +150 °C (-4 °F … +302 °F)
with PTFE option: -100 °C … +200 °C (-148 °F … +392 °F)
Sliding velocity: vg = 0.6 … 140 m/s (2 … 459 ft/s)

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.

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

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

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