PVCU Reducing Cross

Product Overview
UPVC Reducing Four-Way Fittings are manufactured from high-purity rigid polyvinyl chloride (PVC), compliant with GB/T 10002.2 standards. Main pipe diameters range from 25-250mm, with branch pipe diameters 1-2 sizes smaller than the main pipe (e.g., 50mm main pipe paired with 40mm/32mm branch pipes). Verticality tolerance: ±0.5°. The S6.3 series (25mm size) withstands pressures ≤1.6MPa and temperatures from -10°C to 45°C, enabling multi-directional fluid distribution in industrial piping systems.

Fitting Characteristics
Bending strength ≥42MPa, impact resistance ≥7.5kJ/m², withstands corrosion from 20% hydrochloric acid and 25% sodium hydroxide solutions.
Inner wall roughness Ra ≤0.01mm, reducing fluid resistance by 28% compared to steel reducer tees. Oxygen index ≥40% meets B1 flame retardant rating; weighs only 1/6 of equivalent steel tees; complies with GB/T 17219 hygiene standards; exhibits no scaling or heavy metal leaching during long-term use.

Manufacturing Process
Molded in a single injection using a four-cavity specialized die for reducers (precisely controlling concentricity across ports) with UPVC resin (polymerization degree 1200-1600). Injection temperature: 175-195°C; segmented cooling and setting at 22-26°C. Interior surfaces undergo high-pressure spray smoothing. Each batch undergoes sampling for 1.8 times nominal pressure hydraulic testing (30-minute pressure retention with zero leakage). Dimensions are laser-inspected for accuracy (±0.2mm tolerance) before packaging.

Application Scenarios
Industrial Water Supply & Drainage: Used for multi-directional branching in factory water networks (e.g., main pipes branching to different-diameter branch pipes for workshops). Resistant to wastewater corrosion, stable operation at 1.6MPa, accommodates varying flow demands at different water points.
Chemical Auxiliary Systems: Connects solvent and cooling water pipelines for differential distribution. Resistant to mild corrosion, precisely controls flow rates in each branch to ensure on-demand fluid delivery for chemical auxiliary processes.
Electronics Factory Piping: Supports multi-directional branching for cleaning water and pure water pipelines in electronics facilities (e.g., main lines branching to small-diameter branches for equipment). Resistant to cleaning solution corrosion, meeting clean production requirements.
Food Processing Workshops: Used for diverging water supply pipelines in food processing areas (e.g., branching main pipes to smaller-diameter production line branches). Meets hygiene standards with residue-free inner walls to ensure water safety.
Municipal Small-Scale Piping Networks: Suitable for diverging small-scale water supply networks in residential communities, industrial parks, etc. Features easy installation, meets pressure requirements, and accommodates varying flow distribution needs across different zones.

Connection Method with Other Fittings and Pipes
Employ socket-and-glue bonding: First, sand the insertion ends of all ports (15-25mm length, adjusted per diameter) to a roughness of Ra 1.6-3.2μm. After cleaning debris, evenly apply specialized UPVC industrial adhesive (0.1-0.15mm thickness). Allow to air dry for 3-5 seconds before aligning and inserting without axial misalignment. Let stand for 24 hours for adhesive curing. For connecting metal fittings, use corresponding UPVC internal thread adapters.