PN25
Yoshitake GD-55-80 is a home boiler regulator mainly used for water supply to hot water heat exchangers. It maintains a stable water supply pressure in order to prevent the heat exchanger body from experiencing high pressure.
It is not just for pressure reducing but also incorporates functions for back-flow prevention, negative pressure operation, pressure balancing, and an integrated strainer.
Features
- The valve uses a pressure balance structure.
- Pipes can be installed either horizontally or vertically.
- The valve and diaphragm are made of chlorine resistance synthetic rubber.
Specifications
| Application | Cold and hot water |
|---|---|
| Inlet pressure | 100-750 kPa |
| Standard set pressure | 80 ± 6 kPa |
| Body | Bronze |
| Diaphragm | Synthetic rubber |
| Valve · Check valve | Synthetic rubber |
| Strainer | Screen: Stainless steel, Frame: Synthetic resin |
| Strainer mesh | 60 mesh |
| Maximum temperature | 60°C |
| Connection | JIS Rc screwed |
| Install direction | Horizontal and vertical |
INFO
- Standard set pressure 65 kPa (JIS approved) is available for GD-55-65 and GD-56-65.
- Standard set pressure 30-200 kPa is available for GD-55 and GD-56.
Dimensions and Weights
Performance Charts
Pressure Characteristic Chart
Flow Characteristic Chart
Maximum Pressure Requirements
Maximum pressure of Water pressure reducing valve, Relief valve and Hot water heat exchanger:
| Water pressure reducing valve | Relief valve for hot water maker | Max. pressure of hot water heat exchanger |
|---|---|---|
| 80 | 95, 97 | 100 |
| 85 | 97 | 100 |
| 120 | 190 | 200 |
| 150 | 190 | 200 |
| 170 | 190 | 200 |
WARNING
Attention: Using the bold font valves to simple boiler (100 kPa) is illegal.
Piping Example
Materials and Parts
| No. | Part Name | Material |
|---|---|---|
| 30 | Label | Polyester |
| 29 | Cap | POM |
| 28 | Spring | Stainless Steel |
| 27 | Breaker Valve | Stainless Steel |
| 26 | O-Ring | NBR |
| 25 | O-Ring | NBR |
| 24 | Strainer Cap | Brass |
| 23 | Push Nut | Stainless Steel |
| 22 | Spring | Stainless Steel |
| 21 | O-Ring | NBR |
| 20 | Strainer | Stainless Steel & POM |
| 19 | Disc | NBR |
| 18 | Holder | POM |
| 17 | Adjusting Screw | Brass |
| 16 | Spring Plate | Carbon Steel |
| 15 | Spring | Piano Wire |
| 14 | Set Screw | Steel |
| 13 | Spring Cover | Carbon Steel |
| 12 | O-Ring | NBR |
| 11 | Valve Cap | Brass |
| 10 | Nut | Brass |
| 9 | Washer | Stainless Steel |
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