MG1 G4 Mechanical Seal 25mm – VIT/SiC/SiC (T-19 Equivalent) | Seat 38 × 7.5mm

Direct-fit aftermarket MG1 G4 25mm mechanical seal replacement seal built for demanding pump applications where extended wear life and chemical resistance matter. This version uses a Viton elastomer with Silicon Carbide / Silicon Carbide (SiC/SiC) sealing faces, making it an excellent choice for tough water conditions, higher heat, and abrasive service compared to standard carbon/ceramic combinations.

Specifications

• Seal Style: MG1 G4

• Shaft Size: 25mm

• Seat Size: 38mm × 7.5mm

• Elastomer: Viton (FKM)

• Face Materials: Silicon Carbide / Silicon Carbide

• Cross Reference: T-19, HD-8038, STG4VSC25

Cross references & alternative part numbers 
This seal is also commonly referenced as:

• T-19 25mm mechanical seal

• HD-8038 seal

• STG4VSC25 seal

• MG1 25mm Viton SiC/SiC seal

• 25mm mechanical seal with 38 × 7.5mm seat

Need help confirming fit?
If you’re matching a seal by size, confirm the shaft size (25mm) and the seat (38 × 7.5mm) before ordering. If you want, send us the pump model and a photo of the old seal/seat for verification.