Class P unbalanced seals P01, P02, P11, P12
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P11 unbalanced seal
Class P unbalanced seals
P01, P02, P11, P12
Features
- Rotating multi-spring pusher seals
- Unbalanced
- Compact in length
- Available as O-Ring or wedge variants
- Uniform seal face loading
- Circlip design for ease of assembly
in P11 / P12 seals - Independent of direction of rotation
- Available as single, dual and tandem arrangements
Advantages
- Ideal for general purpose applications
- Over 35 years of running reference in the field
- Narrow cross-section allows the seal fitment in narrow stuffing boxes
- Lower inventory since all parts except seal ring and cups are interchangeable with Class P balanced seals (P03, P04, P13, P14).
Operating range
Shaft diameter: d = 25 … 100 mm (1" ... 3.94")
Pressure: p = vacuum to 16 bar (232 PSI)
Temperature:
t = -75 °C ... +260 °C (-103 °F ... +500 °F)
Sliding velocity: vg = 25 m/s (82 ft/s)
Axial movement: ±0.5 mm
Materials
Seal ring: Carbon graphite resin impregnated,
Carbon graphite antimony impregnated
Mating ring: Silicon carbide, Tungsten carbide, Ceramic
Secondary seals: FKM, NBR, FFKM, PTFE
Springs: Hastelloy® C-4
Metal parts: SS 316, other materials on request.
Recommended applications
- Process industry
- Oil and gas industry
- Refining technology
- Petrochemical industry
- Chemical industry
- Pharmaceutical industry
- Power plant technology
- Water and waste water technology
- Building services industry
- Food and beverage industry
- Sugar industry
- Horizontal and vertical pumps, agitators, mixers
Recommended piping plans
API Plans 01, 02, 03, 11, 12, 13, 14, 21, 22, 23, 31, 32, 41, 52, 53A, 53B, 53C, 54, 55, 61, 62, 65A, 65B, 66
Product variants
P12 unbalanced seal with circlip
P01 unbalanced seal
P02 unbalanced seal with wedge as secondary seal
