Single Spring Mechanical Seal 3992 | PS-3992 Equivalent (G-Type / 2100)
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DESCRIPTION
Single Spring Mechanical Seal 3992 | PS-3992 Equivalent
Direct-fit aftermarket replacement G-Type mechanical seal equal to industry standard 3992 / PS-3992, built in the John Crane 2100 / 2106 style for reliable, leak-tight performance in common pump services. Designed for use with a 1-1/2″ cup seat and matches configurations commonly used in 2100S 38mm rotary assemblies.
Key specs: • Shaft size: 1-1/2″ (1.500″) single spring seal • Seat (mating ring): 2.125″ x 0.437″• Rotary OD: 2.125″ • Working length: 1.181″
Material build: Carbon/Viton (FKM)— Viton elastomers with Carbon rotary face (typical PS-3992/VCFJF listings)
Compatible components
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Designed for use with 1-1/2″ cup seat. Matches configurations used in 2100S 38MM rotary assemblies.
Please click “specifications” below for OEM numbers and Pump Nameplate Data
Explore our full lineup of Single Spring Seals—PS replacements, pool/spa seals, and our SPS line.
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SPECIFICATIONS
OEM numbers: 31374
Brands: MP PUMPS, INC. (Division of GARDNER DENVER)
Nameplate Data: None available
Cross References / Alternate Part Numbers
OEM cross reference
MP Pumps, Inc. OEM number: 31374
Industry / style cross references
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3992, PS-3992
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Type G / G-Type
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John Crane 2100 equivalent, John Crane 2106 equivalent
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Seal/material code: VCFJF
Common “typed” variations (same part, different formatting)
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PS-3992 = PS3992 = PS 3992
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31374 = 31-374 (sometimes appears in shop notes/invoices)
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1.500″ = 1-1/2″ = 1.5″
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