Fushiman Co.
Fushiman VK16 type sight glass for steam

Manufacturer: Fushiman Co.,LTD.
Model: VK16
| Model | Nominal Diameter | Method | Maximum Operating Pressure | Maximum Operating Temperature | Body Material | Connection |
|---|---|---|---|---|---|---|
| VK16 | 15–50 | – | 2.8 MPa | 250°C | Carbon Steel Forgings | Flange |
Features
Unlike general sight glasses, this sight glass is specifically designed to be installed on the inlet side of the trap.
With conventional sight glasses installed on the outlet side, you can only tell whether the trap is working or not.
However, this sight glass allows visual confirmation of steam leakage and condensate accumulation inside the trap, making it not only effective for energy-saving but also useful for monitoring equipment operation.By simply rotating the internal core, it can also be installed on vertical piping.
Example of Use


Specifications and Materials
| Model | Pressure (MPa) | Max. Temperature (°C) | Water Quality (pH) | Valve Box Material | Sight Glass | Installation Orientation |
|---|---|---|---|---|---|---|
| VK14 Type | 1.1 | 250 | pH ≤ 9 | Cast Iron | Heat-resistant tempered glass | Horizontal or vertical piping |
| VK16 Type | 2.5 2.8 | 300 250 | pH ≤ 10 | Carbon Steel | Heat-resistant tempered glass (with mica plate) |
Structure and Dimensions

| Model | Nominal Diameter (mm) | Flange Standard | |||||
|---|---|---|---|---|---|---|---|
| 15 | 20 | 25 | 40 | 50 | |||
| VK14 Type | L (mm) | 130 | 150 | 160 | 200 | 230 | DIN PN16 |
| Weight (kg) | 3 | 3.7 | 4.3 | 14 | 16 | ||
| VK16 Type | L (mm) | 130 | 150 | 160 | 200 | 230 | DIN PN40 |
| Weight (kg) | 4 | 5 | 5.5 | 13 | 15.5 | ||
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