Overview
The Vermont ZLR122-HD mechanical seal cartridge is a dual stationary seal system designed for centrifugal and rotary pumps featuring 2″ shaft diameters. The ZLR122-HD combines Vermont’s proven cartridge seal technology with Heavy Duty (HD) construction, providing robust sealing performance across a wide range of industrial applications. As a pre-assembled, factory-set unit, this cartridge eliminates field assembly complexity and reduces installation errors.
Key Features
- Dual Stationary Design: Non-rotating springs and mechanisms resist vibration harmonics and fatigue, improving seal longevity.
- Self-Centering Cartridge: No field measurements required; slide over shaft, tighten gland bolts and set screws, then remove centering clips.
- Pre-Assembled Construction: Factory-tested unit arrives ready to install, minimizing assembly points and potential errors.
- 2″ Shaft Compatibility: Engineered specifically for 2″ pump shafts in standard industrial pump housings.
- Heavy Duty Rating: HD designation indicates enhanced performance for higher pressures, temperatures, or cyclic duty.
- Monolithic Seal Faces: Thick cross-section design for superior pressure and temperature resistance.
Technical Specifications
- Shaft Size: 2″ nominal diameter
- Seal Type: Dual Stationary Cartridge
- Design Series: Vermont ZLR122
- Rating: Heavy Duty (HD)
- Installation Type: Cartridge (self-centering, pre-set)
- Seal Face Configuration: Dual opposing faces
- Spring Type: Stationary (non-rotating)
Typical Applications
The Vermont ZLR122-HD is suitable for use in:
- Centrifugal pump applications across chemical, water treatment, and general industrial sectors
- Rotary pump systems requiring reliable long-term sealing performance
- Equipment operating under moderate to elevated pressure and temperature conditions
- Facilities seeking to reduce spare parts inventory through standardized seal cartridges
- Retrofit and OEM replacement duties on existing 2″ shaft pump systems
Compatibility & Replacements
Compatible With
- Vermont pump models with 2″ shaft seal chambers
- Industry-standard gland packing casing covers and seal chambers
- Centrifugal and rotary pump housings accepting 2″ nominal shaft cartridge seals
- Standard mechanical seal gland designs (API 682 compatible platforms)
Replaces / Drop-In Replacement For
Verify specific replacement compatibility with your pump documentation or system integrator before ordering. The ZLR122-HD is designed to replace prior-generation ZLR122 models and equivalent 2″ dual stationary cartridge seals in Vermont pump systems.
Works With
- Mechanical seal flush plans and barrier fluid systems
- Standard centrifugal pump piping and gland connections
- Industry-standard seal chamber geometries and mounting interfaces
- Both new installations and retrofit applications on qualifying pump frames
