Double-layer wiper tip
The HMT Secondary Wiper Seal utilizes a multiple-wiper tip assembly to conform well to the tank shell and maintain an excellent seal.
Hardened-steel pressure components
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.
Continuous vapor barrier under compression plates
The HMT Secondary Wiper Seal utilizes continuous fabric vapor barrier under the compression plates, ensuring far better seal integrity than systems that rely on gaskets between plates.
Narrow compression plates
The HMT Secondary Wiper Seal has narrow compression plates for excellent flexibility and conformation to tank shell deviations, but also to reduce wiper tip wear versus compression plate systems with wider plates, which concentrate tip pressure at the overlaps and create uneven wear.
Best-in-class vapor barriers
Premium fabric options ensure optimal product compatibility and life span, even including flame-retardant PTFE options compliant with DIN 22118 standard. We offer a variety of fabric choices depending on your service requirements. Our standard PTFE fabrics are laminated and are unsurpassed in terms of durability, impermeability, and service life. HMT’s fabrics will wear extremely well in even the most aggressive services.
Sized to fit the tank
All tank shells are not alike, and it’s critical that seals are designed to handle unique rim-space requirements. HMT’s engineering and manufacturing automation allow each seal to be manufactured to fit the specific rim space and/or verticality data provided by the purchaser, ensuring optimal performance and mitigating the chance of operational issues over time.