Gorman Rupp 12364A / VG-7079 Mechanical Seal — 1-1/2″

Direct-fit 1-1/2″ Gorman Rupp 12364A mechanical seal for Gorman Rupp Super T Series self-priming centrifugal pumps, available in two builds: with sleeve and without sleeve. A common replacement for VG-7079, this seal also cross-references Gorman Rupp 46512-047 and fits T-Series models including T3, T4, and T6 (3″, 4″, and 6″ trash pumps). Pre-built Type 11 cup-mount component seal in a hard-face Silicon Carbide / Silicon Carbide build, sized for a 1-1/2″ shaft and supplied with shims and O-rings for a clean rebuild. Commonly used on T-Series pump models including T4A3S-B (verify by nameplate/build sheet).

Please note: This is our aftermarket-engineered version of the OEM seal, featuring Silicon Carbide faces, a cup-style stationary seat, and a modified rotary assembly. These changes lower operating temperature, reduce face loading, and expand the effective sealing surface — collectively improving wear resistance and extending seal life.

---

Available options:

• With sleeve

• Without sleeve 

---

At a glance

• Shaft size: 1-1/2″ (1.500)

• Seal Type: 11-cup mount component seal

• Includes: Shims and O-rings

• Faces: Silicon Carbide / Silicon Carbide (SiC/SiC)

• Fits pump models: Gorman Rupp T-Series — T3, T4, T6 (3″, 4″, 6″ trash pumps), e.g. T4A3S-B

• Common replacement for: VG-7079

• Cross-references: Gorman Rupp 46512-047

Applications: This 1-1/2″ mechanical seal is a popular replacement for Gorman Rupp T-Series self-priming trash pumps, covering 3″, 4″, and 6″ models (T3, T4, and T6) used in sewage, dewatering, construction, and municipal solids-handling work. Whether you’re searching for a Gorman Rupp trash pump seal replacement, a Silicon Carbide seal for a T4A3S-B, or a 1-1/2″ mechanical seal for a self-priming pump, this is the direct-fit part — built for longer life and easier installation than a standard seal.

---

Cross Reference / Alternate Search Numbers

GR12364A • GR 12364A • GR-12364A • 12364A • GR12451A • GR 12451A • GR-12451A • 12451A • VG-7079 • VG 7079 • VG7079 • 46512-047 • 46512 047 • GR46512-047 • Gorman Rupp 12364A mechanical seal • Gorman Rupp 12451A mechanical seal • VG-7079 mechanical seal • 1-1/2″ Gorman Rupp T-Series mechanical seal • Gorman Rupp T3 seal • Gorman Rupp T4 seal • Gorman Rupp T6 seal • Gorman Rupp 3″ trash pump seal • Gorman Rupp 4″ trash pump seal • Gorman Rupp 6″ trash pump seal • Type 11 1-1/2″ cup seal • spec 0381.GR.N.S • Tech Ref 1155

---

Gorman Rupp 1-1/2″ Mechanical Seal 12364A vs 46513-150 — Both fit GR T-Series, which one do I choose?

OEM Equivalent vs. Easy-Install

Both share the same build: 1-1/2″ shaft, shims & O-rings, and fit Gorman Rupp Super T Series pumps models including T3, T4, and T6 (3″, 4″, and 6″ trash pumps), such as T4A3S-B

Product	OEM Equivalent Product:Gorman Rupp Mechanical Seal 46513-150	Easy-Install Aftermarket Product:Gorman Rupp Mechanical Seal 12364A
Design basis	Matches original OEM factory specification	Aftermarket-engineered redesign
Design changes	Standard OEM seat & rotary	Cup-style seat + redesigned rotary
Installation	Standard OEM fit	Engineered for easier installation
Performance & life	OEM-standard performance and life	Runs cooler, less face load, larger sealing surface — longer seal life
Best for	An exact factory-match replacement	Easier installation and longer service life

---

---

Explore our full line up of OEM seals 

Looking for more? Shop Pump Repair Kits, Shaft Seals and Pre-Cut Gaskets

Have questions? Call us anytime- we’re here to help