Application
Low pressure and high (mains) pressure hot water systems.
Video
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Low Pressure Cold Water Expansion Valve. |
| Run-time: 18 seconds |
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High Pressure Cold Water Expansion Valve. |
| Run-time: 23 seconds |
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Requires Windows Media Player to be installed.
Standards
- Complies with NZ Building Code G12 (2001)
- Complies with NZS 4608:1992
Specifications
| Inlet/Outlet: |
20mm, 3/4" BSP (male) |
| Drain: |
15mm, 1/2" BSP (male) |
| Length: |
62mm |
- Standard pressure settings
- 75 kPa [11 P.S.I.]
- 120 kPa [17 P.S.I.]
- 500 kPa [72 P.S.I.]
- 700 kPa [100 P.S.I.]
- Pressure settings between 75 and 700 kPa [11 and 100 P.S.I.] may be factory set for special applications.
- Maximum temperature: 99°C.
- Failsafe against over pressure.
- Flushing lever/handle to clear foreign matter from valve seat.
- Drain may be used as cylinder drain when flushing lever/handle is activated.
- Non-corrosive valve seat.
- Silicon rubber diaphragm.
- DR (Dezincification Resistant) brass.
Installation
- Refer to Technical Area
for installation guide.
- May be installed in any orientation.
- Drain must fall continuously to outlet.
- Do NOT apply heat near valve during installation.
Thermal Expansion
Under normal conditions, a 180 litre hot water cylinder when heated from cold to 65°C will expel 3.6 litres of water due to thermal expansion. The amount of
expansion will vary depending on the volume of hot water used and cylinder capacity.
Accessories
- Non-return (mains pressure only): To prevent
cross-connection of hot water to cold water supply.
- Cap: Should second take off not be required.
Sectional View
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Product Codes
| Low Pressure |
| EVT7.6 |
75 kPa |
| EVT12.2 |
120 kPa |
| High Pressure |
| EVT500 |
500 kPa (use with 350 kPa Limiting Valve) |
| EVT700 |
700 kPa (use with 500 kPa Limiting Valve) |
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