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Name: 891 Rotary Seal
Type: Component Rotary Seal
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Chesterton’s 891 Component Mechanical Seal is a high performance, single component seal. Packed with performance features, it is capable of addressing a wide variety of applications. It can be run against many different stationary seal rings for maximum flexibility in many applications.
The following are recommeded Stationary Seal Faces:
The 891 Mechanical Seal extends capabilities and reliability of general service sealing for plant-wide usage.
- Will not wear shaft or shaft sleeve
- Fits all DIN, ISO, ANSI and other pumps
- Self-aligning capability
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CUTAWAY
Chesterton’s 891 Component Mechanical Seal
- Metal holder is support bushing in the event of shaft bending at start-up.
- The face is not disturbed if there is contact.
- Non-fretting design will not destroy shaft, sleeve or any metal part.
- Balanced O-ring design with anti-clog features
- Springs out of fluid.
- Dynamic O-ring moves to a clean surface.
- Centrifugal force works to clean the seal faces and rotary element.
- Computer profiled face design
- Ability to withstand large changes in operating temperature while keeping face flat.
- Ability to operate at pressures up to 42 BAR (600 psi) because heat generation does not greatly affect seal face flatness.
- Dynamic O-ring slides on smooth, non-metallic surface to prevent fretting and hang-up.
- Metal holder is never subjected to fretting or wear.
- Interchangeability of material - Standard carbon rotary seal face can be easily changed in the field to silicon carbide or tungsten carbide.
- All wearing parts, seal faces, O-rings, screws and springs are replaceable at low cost, making in-plant rebuilding simple and economical.
891 Rotary Seal may be run against conventional stationaries, however, as shown with CHESTERTON Self-Aligning Stationary (SAS), stuffing box face alignment is automatic. Start-up leakage is controlled.
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891 [Use: ENGLISH : Metric Units]
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4000 fpm
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600 psig
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-65 °F
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500 °F
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1.0 - 4.5 Inch
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Note: Be sure to scroll through the entire listing,
so that you don't miss any data files.
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Speed: To 4000 RPM (20 m/sec)
Metal Parts: 316 SS Available in Alloy, Alloy 20, Titanium, Monel, Nickel or Hastelloy B or C
Rotary Face: Carbon, Reaction Bonded Silicon Carbide, Solid Tungsten Carbide with nickel binder
Stationary Face: N/A
Temperature: - -30°C (-20°F) to 205°C (400°F) with Fluorocarbon.
- -55°C (-65°F) to 150°C (300°F) with Ethylene Propylene.
- -18°C (0°F) to 260°C (500°F) with Kalrez.
- -30°C (-20°F) to 230°C (450°F) with Chemraz.
Pressure: To 21 bar (315 psi) - shaft diameter 18 mm to 30 mm To 42 bar (600 psi) - shaft diameter 32 mm to 100 mm To 28 bar (380 psi) - shaft diameter 120 mm to 200 mm
Size (Inch): 1.00" to 4.50"
Size (Metric): 18mm to 100mm
Engineered Solutions are available.
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