Sun’s High Flow 2-Way Solenoid Operated Valves
Many applications require basic 2-way solenoid valves. Flow requirements of 5-10 gpm (20 to 40 L/min.) with 3000 psi (210 bar) operation are quite common. In addition to these lower flow applications, there are many 2-way valve applications that require flows up to 100 gpm (380 L/min.) with pressures reaching 5000 psi (350 bar).
To satisfy this broad range of flow and pressure requirements, Sun offers a complete lineup of solenoid operated 2-way valves, both direct acting and pilot operated, with flow capacities up to 120 gpm (450 L/min.) and pressure ratings of 5000 psi (350 bar). Models DLDA and DTDA, direct acting solenoid valves, easily handle flows up to 12 gpm (45 L/min.) For higher flows, Sun offers pilot operated DF*A versions, which consist of pilot and main stage elements. Using Sun’s unique T-8A cavity concept, four sizes of main stage valves, each with the same size integral, direct acting solenoid pilot valve, make up this family of cartridge valves.
| Using the T-8A Concept to Create a Solenoid Operated 2-way, 120 gpm (450 L/min.) Valve |
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| MAIN STAGE MODEL CODE | CAVITY | CAPACITY | T-8A PILOT VALVE | MAIN STAGE FUNCTION | |
|---|---|---|---|---|---|
| DFCA8D* | T-13A | 15 gpm (60 L/min.) | DAAL*C**** | Normally closed | |
| DFDA8D* | T-5A | 30 gpm (120 L/min.) | DAAL*H**** | Normally open | |
| DFEA8D* | T-16A | 60 gpm (240 L/min.) | |||
| DFFA8D* | T-18A | 120 gpm (480 L/min.) | |||
Features of Pilot Operated Directional Valves
- Pilot valve (model DAAL) spool configuration, “C” or “H”, determines the normally open or normally closed characteristic of the main stage valve.
- In closed mode, maximum combined port 1 to port 2 leakage of both main stage and pilot stage is 15 drops/min. at 5000 psi (350 bar). Reference: Main stage equals 5 drops/min. and pilot stage equals 10 drops/min., both at 5000 psi (350 bar).
- At opening, a 50 psi (3,5 bar) bias spring causes an initial pressure drop of 50 psi (3,5 bar) for Series 1, 2, 3, 4.
- Higher flows demonstrate low pressure drop characteristics. For example, a pressure drop of only 75 psi (5 bar) will result when flowing 50 gpm (200 L/min.) through model DFEA (Series 3) and 90 gpm (360 L/min.) through model DFFA (Series 4).
- Solenoid operated pilot valve model DAAL utilizes the same solenoid/coil options that are available on Series 1 models DLDA and DTDA, along with the same manual override options.