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This hose barb type hydraulic quick coupling follows Japanese standard dimensions and features a valveless design. Unlike quick couplings with internal valves that restrict flow, the valveless construction provides an unobstructed fluid path, making it suitable for high-viscosity liquids that require full-bore flow.
The coupling consists of two mating halves — a socket and a plug — that connect and disconnect without tools. The hose barb end accepts flexible hoses with corresponding inner diameters, secured by hose clamps or crimp ferrules. Machined from brass, the coupling offers corrosion resistance and consistent performance across repeated connection cycles.
The valveless design means neither the socket nor the plug contains an internal check valve. When disconnected, fluid can flow freely through both halves. This design eliminates the pressure drop associated with valve mechanisms and allows thick or viscous fluids to pass without restriction. The tradeoff is that fluid drainage occurs upon disconnection, so this type is best suited for systems where spillage is manageable or where draining is intentional.
The coupling is designed for use with water-based fluids, hydraulic oils, and high-viscosity liquids. Its large internal passage accommodates fluids that would be problematic in valved couplings with restricted orifices. Common applications include mold cooling water, lubrication systems, and viscous material transfer lines.
The coupling body is machined from brass bar stock. Brass provides good corrosion resistance, machinability, and thermal conductivity — properties that are advantageous in cooling system applications. The material also maintains dimensional stability across temperature variations.
The brass surface receives a standard machined finish. The coupling halves engage through precision-machined mating surfaces that ensure proper alignment and a leak-free seal when connected. The external surfaces are smooth with no sharp edges, facilitating safe handling during installation and maintenance.
The hose barb end features multiple stepped ridges that grip the interior of flexible hoses. This barb design provides a mechanical hold that prevents the hose from slipping off under pressure. For maximum security, the use of hose clamps or crimp rings over the hose exterior is recommended.
The following tables provide dimensional specifications for the socket (TSH series) and plug (TPH series). All dimensions are in millimeters.
Part number | for hose | Size L | D | H | A | T | B |
1TSH | 1/8" | 40 | 17.5 | 16 | 20 | 6.5 | 3 |
2TSH | 1/4" | 55 | 24 | 22 | 29 | 8 | 5 |
3TSH | 3/8" | 62 | 28 | 25 | 32 | 11 | 7 |
4TSH | 1/2" | 74 | 35 | 32 | 39 | 15 | 10 |
6TSH | 3/4" | 90 | 45 | 40 | 48 | 21 | 15 |
8TSH | 1" | 102 | 58 | 52 | 57 | 27 | 19 |
10TSH | 1 1/4" | 117 | 69 | 64 | 70 | 34.5 | 26 |
12TSH | 1 1/2" | 128 | 75 | 70 | 75 | 41 | 32 |
16TSH | 2" | 141 | 98 | 90 | 80 | 54 | 40 |
Part number | for hose | Size L | H | A | C | T | B |
1TPH | 1/8" | 41 | 12 | 20 | 15.5 | 6.5 | 3 |
2TPH | 1/4" | 53 | 14 | 29 | 18 | 8 | 5 |
3TPH | 3/8" | 60 | 18 | 32 | 21 | 11 | 7 |
4TPH | 1/2" | 70 | 22 | 39 | 24 | 15 | 10 |
6TPH | 3/4" | 84 | 28 | 48 | 28 | 21 | 15 |
8TPH | 1" | 105 | 40 | 57 | 36 | 27 | 19 |
10TPH | 1 1/4" | 121 | 48 | 70 | 39 | 34.5 | 26 |
12TPH | 1 1/2" | 132 | 55 | 75 | 45 | 41 | 32 |
16TPH | 2" | 142 | 70 | 80 | 51 | 54 | 40 |
In injection molding facilities, these couplings connect cooling water lines to mold channels. The quick-connect design speeds up mold changeovers, reducing downtime between production runs. The valveless structure allows full water flow for efficient cooling cycle times.
For low-pressure hydraulic circuits such as return lines and drain lines, the coupling provides a convenient connection point. The brass construction is compatible with most hydraulic oil formulations.
The valveless full-bore design makes this coupling suitable for transferring viscous materials such as adhesives, sealants, and thick lubricants. The unrestricted passage prevents clogging and pressure buildup that can occur with valved couplings.
In manufacturing plants, the coupling serves as quick-disconnect points in process water systems. It is commonly found in food processing, chemical plants, and metalworking facilities where frequent hose connections and disconnections are required.
A valveless quick coupling has no internal check valve in either the socket or plug half. When disconnected, fluid can pass through both ends freely. This design provides maximum flow area and is ideal for high-viscosity fluids, though it does not prevent fluid drainage upon disconnection.
This coupling follows Japanese standard dimensions for hydraulic quick couplings with hose barb connections. The TSH socket and TPH plug series are designed to mate with corresponding Japanese standard components.
The couplings are available for hose sizes ranging from 1/8 inch to 2 inches inner diameter. Refer to the TSH and TPH dimension tables for specific size codes and corresponding dimensional data.
Pressure ratings vary by coupling size and application conditions. Smaller sizes generally handle higher pressures. For specific pressure rating information based on your size selection and fluid type, contact the technical support team.
Yes, the socket (TSH series) and plug (TPH series) are available as separate components. This allows users to replace only the worn half or to configure systems with multiple plugs per socket. Order by part number to ensure correct sizing and compatibility.
