Rotary Inside Single Seal
Chesterton's 891 Component Mechanical Seal is a balanced high performance, component single seal. The 891 can be run against many different stationary seal rings for maximum flexibility in many applications. It is a non-fretting design that will not damage the shaft sleeve or any metal parts within the seal.
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| Pressure Rating |
To 21 bar g (315 psig) - shaft diameter 18 mm to 30 mm To 42 bar g (600 psig) - shaft diameter 32 mm to 100 mm To 28 bar g (380 psig) - shaft diameter 120 mm to 200 mm
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| Temperature Rating |
-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) |
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| Shaft Speed |
To 4000 RPM (4000 FPM) |
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| Standard Size Range |
18mm to 100mm
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| Standard Size Range |
1.00 to 4.50
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| Standard O-rings |
Fluorocarbon, Spare Ethylene Propylene |
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| Standard Seal Faces (Stationary) |
N/A |
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| Standard Seal Faces (Rotary) |
Carbon, Reaction Bonded Silicon Carbide, Solid Tungsten Carbide with nickel binder |
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| All Major Metal Parts |
316 SS Available in Alloy, Alloy 20, Titanium, Monel, Nickel or Hastelloy B or C |
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