Class P balanced seals P23, P24, P31
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P23 balanced O-Ring seal
Class P balanced seals
P23, P24, P31
Features
- Rotating multi-spring pusher seals
- Balanced
- Compact in length
- Available as O-Ring or wedge variants
- Uniform seal face loading
- Self-balanced seal with spring outside product design (P31)
- Independent of direction of rotation
- Available as single, dual and tandem arrangements
Advantages
- Ideal for process 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 composite are interchangeable with Class P balanced seals (P21, P22).
- No spring clogging in case of solids in media
Operating range
Shaft diameter: d = 25 … 100 mm (1" ... 3.94")
Pressure: p = vacuum to 50 bar (725 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
(Consult EB for applications outside above limits).
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 Plan 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
P31 Self-balanced, spring outside mounted seal
P24 Balanced wedge seal
