Miyawaki
Miyawaki DF1 Diaphragm Steam Traps
Manufacturer: MIYAWAKI Inc.
Model: DF1
Features
Compact design
Can be installed in small spaces.
No steam leaks
Operates below saturation temperature, resulting in no steam leaks and great energy saving performance.
Easy maintenance
Less components make maintenance and inspection easy.
Typical applications
Suitable for foodstuff devices, bio devices, compact heat exchangers, tank heating, main heat pipes, steam tracing, cleaning devices, and other such applications.
Dimensions/Weight
Screwed
| Connections | Size | Dimensions (mm) | Dimensions (in) | Weight | |||||||
| L | H1 | H2 | W | L | H1 | H2 | W | (kg) | (lb) | ||
| Rc,NPT | 1/2” | 85 | 36 | 18 | 62 | 3.4 | 1.4 | 0.7 | 2.4 | 1,0 | 2.2 |
| 3/4” | 100 | 40 | 23 | 3.9 | 1.6 | 0.9 | 1,2 | 2.6 | |||
| 1” | |||||||||||
Flanged
| Connections | Size | Dimensions (mm) | Dimensions (in) | Weight | |||||||
| L | H1 | H2 | W | L | H1 | H2 | W | (kg) | (lb) | ||
| JIS,ASME 150,300 lb | 1/2” | 175 | 36 | 18 | 62 | 6.9 | 1.4 | 0.7 | 2.4 | 2,3 | 5.0 |
| 3/4” | 195 | 40 | 23 | 7.7 | 1.6 | 0.9 | 3,6 | 7.9 | |||
| 1” | 215 | 8.5 | 4,3 | 9.5 | |||||||
| Connections | Size | Dimensions (mm) | Dimensions (in) | Weight | |||||||
| L | H1 | H2 | W | L | H1 | H2 | W | (kg) | (lb) | ||
| DIN PN40 | DN15 | 150 | 36 | 18 | 62 | 5.9 | 1.4 | 0.7 | 2.4 | 2,3 | 5.0 |
| DN20 | 3,6 | 7.9 | |||||||||
| DN25 | 160 | 6.3 | 4,3 | 9.5 | |||||||
*Customized face-to-face dimensions on request.
*Please contact MIYAWAKI for further information.
Socket Weld
| Connections | Size | Dimensions (mm) | Dimensions (in) | Weight | |||||||
| L | H1 | H2 | W | L | H1 | H2 | W | (kg) | (lb) | ||
| JIS,ASME,DIN | 1/2” | 160 | 36 | 18 | 62 | 6.3 | 1.4 | 0.7 | 2.4 | 1,4 | 3.1 |
| 3/4” | |||||||||||
| 1” | |||||||||||
Specifications
| Model | Connection | Max. operating pressure | Max. operating pressure differential | Max. operating temperature | Valve opening temperature | Body material | |||||
| Type | Size | (MPa) | (psig) | (MPa) | (psig) | (℃) | (℉) | (℃) | (℉) | ||
| DF1-21H | Screwed
Rc,NPT |
1/2” | 2,1 | 305 | 2,1 | 305 | 235 | 455 | 5℃ below saturation temperature | 9℉ below saturation temperature | Forged steel A105 |
| 3/4” | |||||||||||
| 1” | |||||||||||
| DF1-21HF | Flanged
FF,RF* |
1/2” | |||||||||
| 3/4” | |||||||||||
| 1” | |||||||||||
| DF1-21HW | Socket Weld
SW |
1/2” | |||||||||
| 3/4” | |||||||||||
| 1” | |||||||||||
| DF1-21L | Screwed
Rc,NPT |
1/2” | 2,1 | 305 | 2,1 | 305 | 235 | 455 | 15℃ below saturation temperature | 27℉ below saturation temperature | Forged steel A105 |
| 3/4” | |||||||||||
| 1” | |||||||||||
| DF1-21LF | Flanged
FF,RF* |
1/2” | |||||||||
| 3/4” | |||||||||||
| 1” | |||||||||||
| DF1-21LW | Socket Weld
SW |
1/2” | |||||||||
| 3/4” | |||||||||||
| 1” | |||||||||||
*Available flange standards: ASME/JPI 150lb, 300lb, DIN PN40, JIS 10K, 16K, 20K
Discharge Capacity
The condensate flow rate shown assumes a condensate temperature at approximately 10℃ (18℉) for a DF1-21H and 20℃ (minus 36℉) for a DF1-21L below saturation temperature.
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