self-operated before-valve pressure regulator is composed of the control valve, actuator and a spring used for pressure setting. It is suitable for controlling before-valve pressure in the pipes of non-corrosive liquids, gases and vapors. When the before-valve pressure rises, the control valve is opened.
Trim features；
| Trim features： | cage guided, balanced trim |
| Body type： | straight-through type |
| Bonnet type： | standard type |
| Flow characteristic： | quick open |
| Size： | DN15-300(1/2”-12”) |
| Pressure class： | PN1.6、4.0Mpa（ANSI 150、300LB） |
| Leakage class： | ASME B16.104 Ⅴ（soft seal） ASME B16.104 Ⅳ（hard seal） |
| Pipe connection type： | flange type |
| Set value error： | ±8% |
| Applicable temperature range： | -30C° ～ 250C° |
| Actuator type： | diaphragm actuator（self-operated） piston actuator（self-operated） |
