Application
- Low pressure hot water systems.
- Pressure systems for marine applications.
Features/Benefits
- N.Z. forged, high quality, corrosion resistant DR brass body.
- Silicone rubber seals able to withstand 99˚C.
- Body easily unscrews to allow cleaning of seats and seals.
- Unique vacuum break provided means valve retro fits all other similar relief valves at replacement.
- Vacuum relief provided failsafe agains over pressure and implosin .
Video
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Pressure Relief Valve. |
| Run-time: 27 seconds |
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Standards
- Complies with NZ Building Code G12 (2001)
- Complies with NZS 4608:1992
- NZ Patent No. 209613
Specifications
| Inlet: |
20mm, 3/4" BSP (male) |
| Outlet: |
15mm, 1/2" BSP (male) |
| Length |
80mm (valve) |
| 107mm (c/w vacuum break) |
- Standard pressure settings
- 37 kPa [5.4psi]
- 75 kPa [11psi]
- 120 kPa [17psi]
- Special settings up to 415 kPa [60psi].
- Maximum temperature: 99˚C.
- Minimum temperature: 1˚C.
- Kilowatt Rating: 12 kW
- Vacuum Break (VBN) available
separately.
Installation
- Refer to Technical Area
for installation guide.
- Install approximately 1 metre above Pressure Reducing and Cold Water Expansion Valves.
- May be installed vertically or horizontally provided vacuum break is used..
- Provide 150mm heat loop.
- 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 (12.6 meters of 20mm copper pipe) of water due to thermal expansion. The amount of
expansion will vary depending on the volume of hot water used and cylinder capacity.
Accessories
Sectional View
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Product Codes
| RV3.7 |
37 kPa |
| RV7.6 |
75 kPa |
| RV12.2 |
120 kPa |
| RVHP |
Settings up to 415 kPa on request for marine cylinders. |
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