Elbow 40mm DADEX PPRc

Description

Elbow 40mm

 

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What is Elbow 40mm DADEX PPRc ?

 

The Elbow 40mm DADEX PPRc PN 25 is a high-quality pipe fitting from DADEX’s Polydex series, manufactured using Polypropylene Random Copolymer (PPRc) material. It is primarily designed to connect two sections of PPRc pipes at a 90-degree angle (standard configuration, though 45-degree variants exist), facilitating directional changes in piping layouts. This fitting is optimized for use in hot and cold water supply systems, as well as HVAC (Heating, Ventilation, and Air Conditioning) applications, including central air-conditioning setups. It ensures leak-proof joints through socket fusion welding and is suitable for both potable water and non-potable systems like compressed air distribution. The PN 25 rating indicates it can withstand higher pressures and temperatures compared to lower-rated fittings, making it ideal for demanding environments such as high-rise buildings or industrial installations.

Specifications

The following table summarizes the key specifications based on DADEX Polydex standards:

Note: While official DADEX documentation often references PN 20 for pipes, retailer listings and product-specific details confirm PN 25 for fittings like this elbow, enhancing suitability for hot water and HVAC under elevated pressures.

Applications and Usage

This elbow fitting is versatile and commonly used in plumbing and HVAC systems where directional changes are required without compromising flow efficiency or system integrity. Key usage scenarios include:

• Hot and Cold Water Supply: Ideal for potable water networks in residential buildings, apartments, hospitals, hotels, offices, schools, and ships. It handles house connections, boiler setups, high-rise distributions, and water points. For cold water, it prevents frost damage; for hot water (up to 95°C), it maintains structural integrity under pressure.
• HVAC Systems: Suitable for central air-conditioning piping, including chilled water lines and compressed air distribution. Its low heat conductivity reduces energy loss, making it efficient for temperature-controlled environments like commercial or industrial HVAC setups.
• Other Uses: Rainwater harvesting systems, swimming pool plumbing, agricultural/horticultural networks, and transport of liquid foods. It can also be used in seismic-prone areas due to its flexibility and durability.

In practice, the elbow is installed in pipe runs to navigate around obstacles, connect to fixtures, or branch lines. It ensures smooth, noise-free flow and is environmentally friendly, with no risk of leaching harmful substances into water.

Installation Guidelines

Installation of the DADEX Polydex PPRc elbow follows standard socket fusion welding procedures for PPR systems. Always use DADEX-approved tools and follow safety protocols (e.g., wear gloves, ensure good ventilation). Here’s a step-by-step guide:

1. Preparation: Measure and cut the 40mm PPRc pipe to the required length using a sharp pipe cutter for a clean, square edge. Deburr the cut ends with a scraper or file to remove any burrs or irregularities.
2. Cleaning and Marking: Clean the pipe ends and the elbow socket with a clean cloth or alcohol wipe to remove dirt, grease, or moisture. Mark the insertion depth on the pipe (typically 20-25mm for 40mm size) using a depth gauge or the fitting’s guidelines.
3. Heating: Use a PPR fusion welding machine set to 260°C (±10°C). Insert the pipe end and elbow socket into the appropriate heating elements simultaneously. Heat for the specified time: about 8-10 seconds for 40mm diameter (confirm with DADEX manual for exact timing based on ambient temperature).
4. Joining: Remove from the heater and immediately push the pipe into the elbow socket up to the marked depth, without twisting. Hold firmly for 10-15 seconds to allow initial setting.
5. Cooling: Let the joint cool naturally for at least 2-4 minutes before handling or pressure testing. Full strength is achieved after 10-15 minutes.
6. Testing and Concealment: After assembly, pressure test the system (e.g., 1.5 times operating pressure for 1 hour). For concealed installations (e.g., in walls), ensure proper support and expansion allowances to prevent stress.