Product Description
The US SEAL PS-979 PS Pump Seal, with a size of 1.250", is equivalent to a John Crane Type 21. It features a carbon primary ring, Ni-Resist mating rings, and Buna secondary seals. Stainless steel metal parts and springs ensure durability. It also features a 1.765" bore cup mounted mating ring.
- PS Pump Seal
- Size: 1.250"
- Type C- Equal to John Crane Type 21
Product Highlights
Ideal for use in rotary and turbine pumps, compressors, mixers, blenders, and chillers.
Product Information
Standard Information
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Brand: US SEAL
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Manufacturer Part Number: PS-979
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Country of Origin: US
Technical Specifications
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Elastomer: Buna
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Head / Fittings: Type C- Equal to John Crane Type 21
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Metal Parts: Stainless Steel
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Other Factors: 1.765" Bore Cup Mounted Mating Ring
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Part Type: Mechanical Seal
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Product Notes: Tapered Spring
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Quick Specs: PS Pump Seal
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Rotary: Carbon
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Seal Code: BCFKF
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Size: 1.250"
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Spring: Stainless Steel
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Stationary: Ni-Resist
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Type: Armstrong; Bell & Gossett
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MODEL: PS-979
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Manufacturer: U.S. Seal Manufacturing
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Part Number: PS-979
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Shaft Size: 1.250" (1-1/4")
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Rotary Head Type: US Seal Type C (John Crane Type 21) *TAPERED SPRING*
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Rotary Head Material: SS/Carbon/Buna
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Rotary Head Dimensions: 1.937" OD, 1.062" Operating Height
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Stationary Seat Type: Cup Mounted Seat (US Seal Type 1)
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Stationary Seat Material: Ni-Resist(SS)/Buna
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Stationary Seat Dimensions: 1.765" Bore, 0.365" Thick
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Maximum Temperature: 225F (107C)
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Maximum Pressure: to 150 psi (10.3 Bar)
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Seal Faces: Carbon vs. Stainless