Please consider the following:
- Consider what hose size you need. Measure inside diameter, or even outside diameter in some cases. Find out how long a hose or hose assembly you need. All these items affect volume and velocity.
- Is the hose designed for a positive pressure or negative pressure (vacuum) application?
- Hose construction must be resistant to the fluid/mediumpetroleum, phosphate ester, dairy products, etc..
- There are two major varieties of threads on hose fittings, the metric sizes & the imperials (NPT & JIC 37°). Other styles include: British pipe (parallel thread and tapered), Japanese industrial standard (JIS), etc.
- Fitting #1 is always pointed down; this is considered 0° degree angle. Fitting #2 is adjusted when finding the proper angle. Stand behind fitting #2, while the hose assembly is parallel to the ground. Fitting #2 points at zero degree, then turned clockwise to a desired angle. According to photo, fitting #2 is at 180° degree angle.
- Overall length (OAL) of the hose is just as critical. Measurement should end at the tip of male fitting, for example. As for the female fitting, measurement ends at the end of the flare seat. For elbow fittings, stop at the opening of the fitting, not the edge. See above photo. Female, flat face O-ring Swivel (FFORX) fittings, Code 61 & Code 62 fittings are measured where the flange face end, not at the extended swivel nut fitting.