Product Description
An Expansion Control Valve with a 850 kPa pressure rating and 15mm connections is designed to manage and regulate the pressure in water systems, particularly those affected by thermal expansion. This valve is crucial in systems such as hot water heaters and heating systems to prevent excessive pressure build-up, which could damage the system. Below is a detailed description of its features and typical uses:
Key Features:
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Pressure Rating (850 kPa):
- The 850 kPa rating indicates that the valve can withstand a maximum pressure of 850 kPa (about 0.85 MPa or 123 psi).
- This makes it suitable for moderate-pressure water systems where thermal expansion might occur, especially in domestic hot water or heating systems.
- The 850 kPa pressure rating provides sufficient capacity for most household or smaller commercial applications.
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Connection Size (15mm):
- The 15mm connection refers to the pipe size that the valve fits, which is standard in many domestic plumbing systems.
- It is ideal for residential applications and ensures the valve is compatible with standard 15mm piping commonly found in water heating and plumbing systems.
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Function:
- The primary function of the Expansion Control Valve is to regulate the pressure in a water system by releasing excess water if the pressure exceeds the valve's set limit (in this case, 850 kPa).
- As water heats up and expands in a closed system (like a hot water heater), the valve opens to safely release water, preventing overpressure that could lead to system damage or failure.
- This ensures that the system maintains safe operating pressure, protecting pipes, fixtures, and appliances.
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Material:
- These valves are usually made from brass or stainless steel, ensuring durability and resistance to corrosion, which is essential in hot water systems that operate at high temperatures.
- These materials also ensure the valve can withstand the wear and tear caused by prolonged exposure to hot water.
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Application:
- Hot Water Systems: Commonly used in household or residential hot water systems where thermal expansion may increase pressure.
- Boiler Systems: Used in heating systems (such as hydronic or steam boilers) to maintain safe pressure levels.
- Solar Water Heating Systems: Often used in solar water heating systems where excess pressure might develop due to solar heat.
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Safety Features:
- The Expansion Control Valve is designed with safety in mind. It opens to release water when the system's pressure exceeds the set point, preventing damage to the tank, pipes, and other components.
- It helps protect against the dangers of over-pressurization, such as tank rupture, pipe bursting, or other system failures.
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Regulatory Compliance:
- The valve typically complies with safety and quality standards such as AS/NZS 1869 for flexible hoses and connections, ensuring that it meets the required standards for gas and water systems in various regions.
Typical Uses:
- Residential Hot Water Systems: To prevent pressure build-up in domestic water heaters and plumbing systems, especially in closed-loop systems where water is heated and expands.
- Heating Systems: Often used in hydronic heating systems, where water circulation is involved and thermal expansion needs to be controlled.
- Solar Water Heating Systems: Solar heating systems can have fluctuating pressures due to the high temperatures involved, and an expansion control valve helps maintain safe operation.
Installation:
- The 15mm valve fits standard domestic plumbing systems, making it an easy replacement or installation for most residential applications.
- Installation Location: The valve is typically installed near the water heater or boiler, or on the outlet of the hot water supply to regulate the pressure.
- Professional Installation: While installation can be done by a competent DIYer, it's recommended that a licensed plumber perform the installation, especially when working with pressurized systems, to ensure there are no leaks and the system is safe.
Considerations:
- Pressure Setting: Ensure that the 850 kPa pressure rating is appropriate for your system's requirements. For systems that regularly exceed this pressure, a higher-rated valve might be necessary.
- Maintenance: Periodic checks are necessary to ensure the valve is functioning correctly. Buildup of sediment or mineral deposits may cause the valve to fail, so maintenance should be performed regularly, especially in areas with hard water.
Benefits:
- Pressure Relief: By releasing excess pressure, the valve ensures that the system operates safely and efficiently, reducing the risk of damage to the plumbing or heating system.
- Durability: Constructed from corrosion-resistant materials like brass or stainless steel, the valve is built to last and handle the stresses of a hot water or heating system.
- Cost-Effective Protection: This valve is a relatively inexpensive way to protect your water heater, pipes, and fixtures from the risks of over-pressurization.
Ideal Applications:
- Domestic Hot Water Systems
- Heating Systems (Hydronic, Boilers)
- Solar Hot Water Systems
