Union 25mm EG PPRc

Description

Union 25mm

 

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What is Union 25mm EG PPRc ?

 

Description

A Union 25mm EG PPRc PN 25 is a detachable polypropylene random copolymer (PPRc) pipe fitting used for connecting and disconnecting pipes in plumbing systems without tools or cutting. The “Union” design features a threaded nut, seal, and two socket ends, allowing for easy maintenance or reconfiguration. “25mm” indicates the nominal diameter (compatible with 25mm OD PPR pipes), “EG” likely denotes “Equal” (referring to equal-diameter connections or a specific product line), “PPRc” is the material (polypropylene random copolymer for durability), and “PN 25” specifies a pressure rating of 25 bar (362.5 psi). This fitting is engineered for HVAC (heating, ventilation, and air conditioning) systems and hot/cold water supply lines, providing leak-proof, flexible connections in residential, commercial, and industrial applications. PPRc unions are lightweight, corrosion-resistant, and safe for potable water due to their smooth, non-toxic interior.

Specifications

• Material: Polypropylene Random Copolymer (PPRc) – resistant to corrosion, chemicals, and scaling; low thermal expansion.
• Size: 25mm (nominal diameter; fits 25mm OD PPR pipes).
• Pressure Rating: PN 25 (25 bar at 20°C; derates to ~10 bar at 95°C).
• Temperature Range: -20°C to 95°C (-4°F to 203°F) for continuous use; short-term up to 110°C.
• Design: Includes a threaded union nut (often brass or PPR), EPDM O-ring seal, and two fusion sockets for PPR pipe attachment.
• Dimensions: Approximate length 90-110mm, outer diameter ~32mm (matching pipe OD); weight ~150-200g.
• Standards Compliance: Typically conforms to ISO 15874, DIN 8077/8078, or EN 12201; potable water certified (e.g., NSF/ANSI 61 or WRAS).
• Color: Commonly green or white for easy identification.
• Additional Features: Smooth bore for efficient flow; reusable with proper sealing; no electrolysis issues like metal fittings.

Installation

Installation combines heat fusion welding for PPR connections and mechanical assembly for the union. Follow manufacturer guidelines and local codes.

1. Preparation: Ensure pipes and fittings are clean, dry, and free of debris. Cut PPR pipes squarely with a pipe cutter; deburr and chamfer edges.
2. Fusion Welding: Heat the union’s socket ends and pipe ends to 260-280°C using a PPR welding machine for 5-10 seconds. Insert pipes into sockets and hold for 10-15 seconds to cool and bond.
3. Assembly: Lubricate the O-ring if needed, place it in the union body, and screw the nut onto the threaded section by hand. Tighten with a wrench (torque to 15-20 Nm; avoid over-tightening to prevent cracking).
4. Testing: Conduct a pressure test (e.g., 1.5x system pressure) to check for leaks. Install expansion loops in hot water systems to handle thermal expansion.
5. Tools Needed: Pipe cutter, PPR fusion tool, wrench, O-ring lubricant.
6. Safety Notes: Work in well-ventilated areas; use gloves to avoid burns during welding. Unions simplify future disassembly for repairs.

Usage

This union is versatile in HVAC and water supply systems for:

• Hot/Cold Water Supply: Linking pipes to fixtures, pumps, or boilers in buildings, enabling quick disconnection for maintenance without disrupting the entire system.
• HVAC Applications: Used in heating circuits, underfloor heating, or air conditioning loops for flexible, corrosion-free connections.
• Advantages: Tool-free disassembly saves time and prevents pipe damage; long lifespan (50+ years), low maintenance, and recyclable. Ideal for systems needing frequent access.
• Limitations: Not recommended for high-vibration setups, compressed air, or environments exceeding PN 25 specs. Shield from UV light if exposed outdoors.