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| Quantity: | |
|---|---|
| Specification | Z1 | H | Packing quanlity |
| S25*20 | 6 | 41 | 520 |
| S32*20 | 7.8 | 46.7 | 360 |
| S32*25 | 6.5 | 46.7 | 300 |
| S40*20 | 9 | 52.5 | 490 |
| S40*25 | 9 | 52.5 | 490 |
| S40*32 | 7 | 50.8 | 300 |
| S50*20 | 10 | 60.5 | 336 |
| S50*25 | 10 | 60 | 336 |
| S50*32 | 9 | 58 | 220 |
| S50*40 | 9 | 57.5 | 220 |
| S63*20 | 10 | 69.5 | 200 |
| S63*25 | 10 | 69.5 | 180 |
| S63*32 | 7 | 69.5 | 180 |
| S63*40 | 7 | 67 | 180 |
| S63*50 | 6 | 65 | 120 |
The DN25x20 PN25 PPR Reducer for Hot Water is a precision-engineered transition fitting designed for high-pressure hot water distribution systems in residential and commercial buildings. Manufactured from PP-RCT (polypropylene random copolymer with raised temperature resistance) compliant with EN 15874:2019—the European standard for PPR hot water systems—this reducer connects 25mm and 20mm pipes while maintaining consistent pressure in domestic hot water, heating, and tempered water applications. Rated for 25 bar working pressure at 20°C and 10 bar at 95°C, it outperforms standard PP-R fittings in high-temperature stability, ensuring a service life exceeding 50 years under continuous hot water service. The one-piece molded construction eliminates potential leak points, with a gradual taper design that minimizes pressure loss in critical hot water circuits .
Formulated with nucleating agents that enhance crystalline structure, the PP-RCT material retains 70% of its strength at 95°C—significantly higher than standard PP-R’s 50% retention. This allows continuous operation at 95°C with short-term peaks up to 110°C during system disinfection, making it suitable for domestic hot water and hydronic heating systems. The material’s low thermal expansion coefficient (0.15 mm/m·K) reduces stress on joints during temperature cycles.
The reducer features a 3° tapered internal transition that reduces turbulence and pressure drop by up to 40% compared to abrupt-step reducers. Computational fluid dynamics (CFD) analysis optimized the flow path to prevent cavitation and erosion in high-velocity hot water systems. The smooth inner surface (Ra <0.008mm) prevents scaling and mineral deposit buildup, maintaining flow rates in hard water areas.
Designed for socket fusion installation, the reducer creates permanent joints with PP-RCT pipes that are stronger than the pipe material itself. Fusion zones are clearly marked with depth indicators to ensure proper insertion depth (16mm for DN25 end, 13mm for DN20 end). The material’s consistent melt flow rate (0.3-1.5 g/10min) ensures uniform fusion quality across installations.
This high-pressure reducer solves hot water transition challenges in:
• Residential Plumbing: Connects main hot water lines (25mm) to fixture supply lines (20mm) in kitchens, bathrooms, and laundry rooms.
• Hydronic Heating: Transitions between boiler supply lines and radiant floor heating circuits, maintaining pressure in closed-loop systems.
• Commercial Buildings: Adapts pipe sizes in hotel room hot water distribution, hospital nursing stations, and restaurant kitchen systems.
• District Heating: Reduces main line diameter to building service connections in centralized hot water supply networks .
PP-RCT offers superior high-temperature strength, retaining 70% of its room-temperature strength at 95°C compared to 50% for standard PP-R, making it ideal for continuous hot water service .
The reducer operates continuously at 95°C with a pressure rating of 10 bar, and handles short-term (≤1 hour) temperature peaks up to 110°C during system sanitization.
Yes. The PP-RCT material meets EN 15874 requirements for potable water contact, with no leaching of harmful substances and certification to NSF/ANSI 61 standards for drinking water system components.
Socket fusion requires a temperature-controlled fusion tool set to 260±10°C, with appropriate sized heating nozzles and calibration rings to ensure proper fusion depth and cooling time.
