QuanSeal™ SLR series PTFE lip-rotary shaft seal PTFE/Rubber Lip seal The PTFE/Rubber seal was specifically developed for severe service. It has a single lip element that combines the low friction properties of PTFE with the flexibility and durability of rubber. It is sealed into an outer metal case and engineered for intermittent pressure service up to 0.05Mpa. Low pressure sealing ability is good