| Part Number: | PU | 8 | B |
|---|---|---|---|
| Explanation: |
Series PU - Straight equal-tube union; B-suffix white-body model range |
Tube Outside Diameter 4 - 4mm at both ends |
Configuration B - White-body configuration |
PU push-in unions join two tubes in a straight line without a threaded connection. Select both ends for the required tube outside diameter. White and black-body versions are available within the series; metric and inch tube sizes must be specified separately.
| Parameter | Specification |
|---|---|
| Fluid | Clean compressed air; vacuum |
| Normal working pressure | 0–0.9MPa |
| Maximum working pressure | 1.32MPa |
| Vacuum pressure range | −99.99–0kPa |
| Ambient and fluid temperature | 0–60°C |
| Compatible tube materials | PU and nylon |
The paired model codes below identify the metric and inch offerings. They do not make the two tube standards interchangeable. Dimensions are in millimetres for the metric models; H is the overall-length column in the dimension table.
| Metric model | Tube OD (mm) | H (mm) | Inch model | Inch tube OD |
|---|---|---|---|---|
| PU-4 | 4 | 33.4 | PU5/32 | 5/32in |
| PU-6 | 6 | 35.1 | PU1/4 | 1/4in |
| PU-8 | 8 | 39 | PU5/16 | 5/16in |
| PU-10 | 10 | 44.4 | PU3/8 | 3/8in |
| PU-12 | 12 | 46.4 | PU1/2 | 1/2in |
| PU-14 | 14 | 51 | — | — |
| PU-16 | 16 | 57.8 |
The white version has an engineering-plastic shell, stainless-steel retaining spring and zinc-alloy spring cover. Its release collar rotates around the tube entry. These construction details describe the illustrated white version.
| Configuration | Models |
|---|---|
| White straight union | PU4B, PU6B, PU8B, PU10B, PU12B, PU14B, PU16B |
