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The Wholesale RPL Series Male Thread Nickel Plated Brass Straight Type Coupling is a cost-effective, high-performance solution for fluid transfer in industrial, commercial, and residential systems, designed for bulk procurement by distributors and manufacturers. Constructed from lead-free brass (CuZn39Pb3) with a durable nickel plating (5μm thickness), this coupling features a male thread (NPT, BSP, or metric) and a straight-through design for minimal flow resistance. Ideal for water, air, and non-corrosive fluids, it balances affordability with reliability, making it a popular choice for large-scale projects like pipeline installations, HVAC systems, and agricultural irrigation.
1. Premium Nickel-Plated Brass: The C3604 brass body with nickel plating (ASTM B633) offers excellent resistance to rust and chemical corrosion, suitable for indoor/outdoor use. The plating ensures a smooth surface finish that reduces mineral buildup in water applications.
2. Multiple Thread Options: Available with NPT (tapered, ASME B1.20.1), BSPP (parallel, ISO 7/1), or metric threads (M10x1–M24x1.5), catering to global pipe standards. Each coupling is clearly marked with thread type and size for easy identification.
3. High Flow Efficiency: The straight cylindrical design with chamfered inlet/outlet minimizes turbulence, maintaining optimal flow rates (up to 50 L/min for 3/8" NPT) and reducing pressure loss in high-flow systems.
4. Wholesale Pricing and Customization: Offered at competitive bulk prices for orders ≥100 units, with options for custom packaging, logo engraving, or special thread finishes (e.g., chrome, zinc) to meet distributor branding needs.
5. Wide Operational Range: Rated for working pressures up to 16 bar (232 PSI) and temperatures from -20°C–120°C (-4°F–248°F), suitable for most low-to-medium pressure fluid transfer applications.
• Industrial Piping: Connects pipes in chemical plants, food processing facilities, and power stations for water, compressed air, and coolant distribution.
• Residential/Commercial Plumbing: Used in bathroom fixtures, heating systems, and irrigation systems, ensuring leak-free connections in potable water and sprinkler setups.
• HVAC Systems: Links air conditioning units, boilers, and radiators, providing flexible routing in heating, ventilation, and cooling installations.
• Agricultural Equipment: Ideal for tractor-mounted sprayers, irrigation pumps, and livestock watering systems, resisting corrosion from fertilizers and hard water.
Q: What is the difference between the RPL Series and standard brass couplings?
A: The RPL Series features a thicker nickel plating (5μm vs. standard 3μm) and is optimized for wholesale, offering consistent quality at scale with customizable options.
Q: Can these couplings be used with gas pipelines?
A: Yes, for natural gas and LPG systems up to 16 bar, provided thread sealant (Teflon tape or paste) is used with tapered NPT threads or O-rings with parallel BSPP threads.
Q: How does the nickel plating affect soldering?
A: The plating should be removed from the soldering area to ensure proper adhesion. Use a wire brush to expose the brass before soldering.
Q: Do you offer non-plated brass versions for high-temperature applications?
A: Yes, plain brass couplings (unplated) are available, suitable for temperatures up to 200°C (392°F) in dry, non-corrosive environments.
Q: What is the minimum order quantity for custom thread sizes?
A: Custom threads require a minimum order of 500 units. Contact our sales team for detailed specifications and lead times.
