Selecting a PTFE hose requires a clear understanding of the operating conditions, the liquid or gas being conveyed and the required assembly dimensions.
Key selection factors
- Working pressure and temperature. Check both against the limits of the selected assembly to avoid deformation or failure. These conditions must be considered together.
- Chemical properties of the medium. Confirm compatibility with the PTFE tube and with every wetted component, including the fittings and seals.
- Length and diameter. The hose must accommodate the connection points and routing without excessive bending or mechanical strain. Its bore must meet the flow requirement.
- Reinforcement. Consider the type of load-bearing braid required for the application and its contribution to the strength of the assembly.
- Applicable standards. Establish the standards, inspection requirements and documentation that the assembly must satisfy.
- Flow capacity. This is the volume of liquid or gas conveyed per unit of time under specified conditions. Select the bore and arrangement to meet the required performance.
- End connections. Correct fittings are essential to the leak-tightness, reliability and performance of the whole system.
Types of end connections
- Flanged connections join a hose to matching flanges on pipework or equipment.
- Union and threaded fittings connect the assembly to suitable equipment ports.
- Compression connections provide a mechanical connection using a compatible compression element, without welding or soldering at that connection.
- Conical-seat connections seal against a matching conical surface and are commonly secured by a threaded nut.
- Quick-disconnect couplings simplify connection and removal where the system design permits their use.
An unsuitable connection can cause leakage and equipment damage. Select the connection type for the pressure, temperature, fluid and mating equipment. Contact our team with a drawing or specification to confirm the appropriate configuration.