Overview
The SpiralTrac™ Environmental Controller is a unique, patented throat bushing specially engineered to transform and control the internal stuffing box environment in rotating process equipment. The EnviroSeal SpiralTrac PI4750RS5750ESC2L1 is a precision-engineered throat bushing designed for pump and rotating equipment sealing applications. SpiralTrac is purpose-built for each application—engineers design hundreds of variations each year to suit specific pumps, seal types, or installation challenges.
Key Features
- Active throat bushing that transforms the seal cavity environment—ideal for single, double, or split mechanical seals. It reduces contaminants, minimizes flush needs, and helps seals last longer with fewer failures.
- Reduce flush water requirements by 60–80% for immediate water and cost savings.
- Keeps abrasives away from the shaft and sleeve, protecting critical components and extending packing life.
- Installs from the gland side with a clearance fit. Works with virtually any rotating equipment.
- Available in ESC (carbon-graphite filled PTFE), GLF (glass-filled PTFE), 416 & 316 stainless steel, bronze, and titanium.
- Radial clearance between the shaft and inside diameter is 0.020″–0.040″.
Technical Specifications
The PI4750RS5750ESC2L1 is a custom-configured unit with ESC material (carbon-graphite filled PTFE). Verify exact specifications and configuration details with EnviroSeal Engineering or an authorized distributor before ordering to ensure proper application fit.
Typical Applications
- Chemical processing and industrial manufacturing
- Slurry and abrasive fluid handling (pulp & paper, mining, water treatment)
- KREBS millMAX and other high-duty rotary pumps
- Centrifugal and gear pump applications requiring reduced leakage
- Systems where flush water cost reduction and environmental compliance are priorities
Compatibility & Replacements
Compatible With
- Single, double, and split mechanical seal systems
- Traditional packing-type stuffing boxes
- Centrifugal and positive displacement pumps (with application-specific sizing)
- Chesterton mechanical seals and packing (compatible through SuperSet configuration)
- Both seal version and packing version SpiralTrac designs
Replaces / Drop-In Replacement For
SpiralTrac units are custom-engineered per application and pump model. The PI4750RS5750ESC2L1 replaces OEM throat bushings, restriction bushings, and lantern rings in specified pump configurations. Verify the exact pump model and original bushing design with EnviroSeal or your distributor before ordering to confirm drop-in compatibility.
Works With
- EnviroSeal SpiralTrac Seal Version (for mechanical seals)
- EnviroSeal SpiralTrac Packing Version (for compression packing)
- Chesterton SuperSet combined sealing solutions
- Flush and drain systems (optimized for low-flush or no-flush operation)
- Rotary equipment with both left-hand (CCW) and right-hand (CW) shaft rotation
