PTFE convoluted hose with stainless steel braid and vacuum helix


Our PTFE hose type NFR-AV is an electrically conductive PTFE convoluted hose with stainless steel braid and a vacuum helix. The rugged stainless steel wire braid provides the PTFE convoluted hose with optimum protection.

PTFE hose type NFR-AV

The PTFE convoluted hose with stainless steel braid and a vacuum helix, suitable for use in potentially explosive atmospheres (EX zone 0), is often used where a vacuum occurs simultaneously with higher temperatures. Proven areas of use include chemical and pharmaceutical plants where high chemical resistance, thermal stability and elasticity, as well as weathering resistance are indispensable. The vacuum helix is located in the wave trough on the outside of the liner and prevents the hose from kinking under extreme conditions. We can offer a variety of fittings and materials for all our PTFE hoses and are pleased to respond flexibly to customer requests. The serial number on the fitting ensures complete traceability of our hoses.

Technical specifications

p-T diagram


Core Electrically conductive PTFE
Cover N/A
Braiding Stainless steel wire braid
Fittings Crimped or flared
Inserts N/A
Temperature -70 °C / +260 °C
Vacuum With a vacuum helix, up to 66.25 mbar absolute at 20 °C/except DN 150: 459.25 mbar absolute at 20 °C
Max. length 10 m, longer lengths on request
Standard/approval FDA 21 CFR 177.1550, FDA 21 CFR 178.3297, USP XXXVI Class VI, EC 1935/2004, free of TSE & BSE

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