HMT - Scissor Shoe Primary Seal
The HMT Scissor Shoe is the world’s leading mechanical shoe seal for external floating roofs. Developed by HMT in 1987, the design has been continuously refined since then. To this day, it remains the most widely utilized and successful primary seal in the industry. The reasons are clear: it works extremely well to prevent gapping; it handles a wide range of rim spaces; and it’s extremely durable – resulting in a long-life, low-maintenance seal.
The scissor hanger mechanism is inherently more adaptable to wide or irregular rim spaces than systems that pivot around a single-arm hanger. The standard scissor hanger handles rim spaces ranging from 3.5 to 18 inches and can be modified to handle wide rim spaces up to 24 inches.
Due to its excellent working range and superior pressure application system, the HMT Scissor Shoe Seal maintains a tight seal even in wide rim spaces and with shell verticality and roundness anomalies.
All HMT pressure-application components are made from custom-hardened stainless steel to prevent yielding under load, ensuring spring longevity and long-lasting seal performance.
Compatible with virtually all stored products; available in both stainless steel and aluminum, and with laminated PTFE vapor barrier.
Bolt-on design; no hot work required
- Multiple PTFE or polyurethane fabric options
- Wax scraper option
- Available for internal or external floating roofs
- Compatible with butt-welded, lap-welded, or riveted tanks
Custom-hardened steel will not fatigue over time, maintaining proper sealing pressure against the tank shell and preventing gaps over the life of the seal.