Product Introduction
The RS-H stainless steel flexible grooved coupling is specifically designed for high-pressure grooved piping systems, including RO seawater desalination systems, zero-liquid discharge systems, lithium extraction from salt lake systems, and other demanding high-pressure applications. With a rated working pressure of 1200 psi (83 bar), it provides the highest level of connection reliability for critical piping environments.
Manufactured from high-strength, highly corrosion-resistant 316L stainless steel or 2205 duplex steel, with 304 SS carriage bolts and 316 SS carriage nuts, the RS-H series delivers exceptional durability and extended service life in the most challenging operating conditions.
Specifications
Size Range: 3/4" to 4" (DN20 to DN100)
Rated Working Pressure: 1200 psi (83 bar) — for grooved pipe only
Gasket: The gasket adopts a "C" type seal structure made from EPDM material, with an operating temperature range of -30 to 110℃. It is compatible with cold water, hot water, dilute acids, oil-free air, and various chemical media. Custom gasket materials such as FKM (fluoroelastomer) and silicone are available upon request for specific operating environments, temperatures, pressures, and media requirements.
Bolt: 304 stainless steel carriage bolt
Nut: 316 stainless steel carriage nut
RS-H Model Specification Table (1000 & 1200 PSI)
| Size | Model | A (mm) | B (mm) | C (mm) | Material |
| DN20 / 0.75" - 26.9mm | RS-H-20*26.9 | 48 | 88 | 43 | SUS316 / SUS2205 (Optional) |
| DN25 / 1" - 32mm | RS-H-25*32 | 55 | 87 | 44 | |
| DN25 / 1" - 33.7mm | RS-H-25*33.4 | 55 | 87 | 44 | |
| DN32 / 1.25" - 38mm | RS-H-32*38 | 65 | 100 | 44 | |
| DN32 / 1.25" - 42.4mm | RS-H-32*42.4 | 65 | 100 | 44 | |
| DN40 / 1.5" - 48.3mm | RS-H-40*48.3 | 72 | 102 | 44 | |
| DN50 / 2" - 57mm | RS-H-50*57 | 85 | 121 | 44 | |
| DN50 / 2" - 60.3mm | RS-H-50*60.3 | 85 | 121 | 44 | |
| DN65 / 2.5" - 73mm | RS-H-65*73 | 98 | 136 | 45 | |
| DN65 / 2.5" - 76.1mm | RS-H-65*76.1 | 102 | 140 | 45 | |
| DN80 / 3" - 88.9mm | RS-H-80*88.9 | 115 | 164 | 45 | |
| DN100 / 4" - 108mm | RS-H-100*108 | 138 | 190 | 52 | |
| DN100 / 4" - 114mm | RS-H-100*114 | 150 | 206 | 52 |
| Product Type | Flexible Grooved Coupling |
| Series | RS-H High Pressure Series |
| Size Range | 3/4" to 4" (DN20 - DN100) |
| Rated Working Pressure | 1200 psi (83 bar) |
| Body Material | 316L Stainless Steel / 2205 Duplex Steel |
| Bolt | 304 Stainless Steel Carriage Bolt |
| Nut | 316 Stainless Steel Carriage Nut |
| Gasket Type | "C" Type Seal Structure |
| Gasket Material | EPDM (Standard), FKM / Silicone available on request |
| Temperature Range | -30 ~ 110 ℃ |
| Pipe Compatibility | Grooved Pipe Only |
| Application | RO Seawater Desalination, Zero-Liquid Discharge, Lithium Extraction from Salt Lakes |
The RS-H Stainless Steel High Pressure Grooved Coupling is used for connecting and securing high-pressure pipes and tubes in industrial and commercial applications. It provides a reliable and efficient solution for joining piping systems in harsh environments, ensuring a leak-proof seal under high pressure conditions. This coupling is particularly suited for applications involving water, air, oil, and gas in industries such as construction, mining, and petrochemicals.
The RS-H Stainless Steel High Pressure Grooved Coupling stands out from other types of couplings due to its high-pressure capability and corrosion resistance. Unlike flanged or welded connections, it uses a grooved technology that allows for quick and easy installation without the need for welding or threading. The stainless steel material ensures durability and longevity, even in corrosive or high-temperature environments. Additionally, the grooved design helps reduce downtime and maintenance costs, making it a preferred choice for demanding applications.
The RS-H Stainless Steel High Pressure Grooved Coupling consists of several key components: the groove coupling body, stainless steel nuts and bolts, and a resilient sealing ring. The groove coupling body fits over the grooved ends of the pipes or tubes, while the stainless steel nuts and bolts secure the coupling, ensuring a tight and leak-proof connection. The resilient sealing ring, typically made of EPDM or NBR, provides the necessary seal to handle high pressures and various media, including water, oil, and gas.
Yes, the RS-H Stainless Steel High Pressure Grooved Coupling is designed to withstand high-temperature environments. Stainless steel is known for its excellent thermal stability and resistance to oxidation, making it suitable for applications where temperatures can reach up to 450°C (842°F). However, it is important to select the appropriate sealing ring material that can also handle the specific temperature range of the application, such as EPDM for lower temperatures or FKM for higher temperatures.
The RS-H Stainless Steel High Pressure Grooved Coupling requires minimal maintenance. Regular inspections of the coupling and sealing ring for signs of wear or damage are recommended to ensure the integrity of the connection. In case of any issues, the coupling can be easily disassembled and reassembled without damaging the pipes or tubes. Replacing the sealing ring is a common maintenance task and can be done quickly without the need for special tools. Proper installation and use of the correct torque specifications during assembly are crucial to maintaining the performance and longevity of the coupling.
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