Miyawaki RE10N Pilot-Operated Steam Pressure Reducing Valve
The Miyawaki RE10N is a pilot-operated pressure reducing valve designed for steam applications, featuring a compact flanged construction. The pilot chamber pressure actuates the movement section, adjusting the main valve opening to maintain downstream pressure at the set point. Manual adjustment is facilitated via a handle with a locking mechanism.
Technical Specifications
- Sizes: 1/2” to 2”.
- Connection: Flanged FF/RF.
- Flange Standards: JIS 10K, 16K, 20K.
- Max Operating Pressure: 1.6 MPa.
- Inlet Pressure: 0.1–1.6 MPa.
- Outlet Pressure Setting: 0.034–1.2 MPa.
- Kvs: 0.9–13.8 m³/h.
- Max Pressure Reduction Ratio: 20:1.
- Max Operating Temperature: 220°C.
- Body Material: Ductile Cast Iron FCD450.
- Minimum Differential Pressure: 0.07 MPa.
- Lock-up Pressure: up to 0.03 MPa.
Construction and Operational Behavior
The RE10N includes an integrated filter and overload protection mechanism. The minimum adjustable flow is 5% of the nominal flow, crucial for selection under varying steam loads. Size selection is based on a capacity chart, considering p1, p2, and required flow in kg/h.
Applications
Suitable for localized steam pressure reduction in food processing equipment, dyeing facilities, cleaning systems, heating elements, and HVAC consumers. The flanged connection distinguishes it from the RE3, which handles similar pressures but in a threaded design.
Installation
Typical setup includes a Y-strainer, separator, steam trap, inlet/outlet pressure gauges, isolation valves, and maintenance bypass. For reduction ratios above 20:1, consider a two-stage pressure reduction.



