MIYAWAKI Threaded RP-6 Series Steam Pressure Reducing Valve (PRV)

Image of MIYAWAKI Threaded RP-6 Series Steam Pressure Reducing Valve (PRV)
MIYAWAKI Threaded RP-6 Series Steam Pressure Reducing Valve (PRV)

This series PRV is pilot piston type pressure reducing valve, mainly composed of main valve and pilot valve. The main valve consists of valve seat, main valve disc, piston, cylinder sleeve, and spring.

The piston valve consists of seat, plug, diaphragm, spring and adjusting spring. Set the outlet pressure through adjusting spring, sense the change of pressure of outlet with diaphragm, adjust the flow area of throttling part of main valve through open and close of pilot valve and drive the piston, to realize the function of reducing and regulating valve.

The product made following improvement on the basis of normal pressure reducing valve, enlarge the piston area, change the throttle structure, change the sealing manner, improve the pilot structure and manner of adjusting spring, thus to improve the performance of the product.

  • Improve the sensing effect to outlet pressure change, increase the sensitivity, greatly reduce the pressure deviation caused by upper stream pressure change and flow change.
  • Improve the distribution of flow line, reduce the noise.
  • Improve the structure of sealing surface; prolong the service life of sealing surface.
    • The product is mainly applied on steam piping, especially the steam piping with big change of pressure and flow.

Performance

Nominal Pressure (MPa) 1.0 1.6
Casing Body Test Pressure(MPa) 1.5 2.4
Sealing Test Pressure (MPa) 1.0 1.6
Max. Inlet Pressure (MPa) 1.0 1.6
Outlet Presure Range (MPa) 0.04-0.6 0.04-1.0
Min. Pressure Difference (MPa) 0.05 0.07

Materials

Name of Part Material of Parts
Body, Bonnet, Cap WCB
Seat, Plug 410 S.S.
Cylinder Sleeve, Piston Al-Fe bronze
Diaphragm PH15-7Mo
Pilot Seat, Pilot, Plug 410 S.S.
Spring ASTM 6150
Pilot Main Spring ASTM 6150
Adjust Spring UNS G92600

Flow Coefficient (Cv)

DN 15 20 25 32 40 50
Cv 1 2.5 4 6.5 9 16

Dimensions

Dimensions of MIYAWAKI Threaded RP-6 Series Steam Pressure Reducing Valve (PRV)
Dimensions of MIYAWAKI Threaded RP-6 Series Steam Pressure Reducing Valve (PRV)
Nominal Diameter G L H H1
15 1/2" 140 160 65
20 3-4" 140 160 65
25 1" 160 168 68
32 1-1/4" 180 185 75
40 1-1/2" 200 185 78
50 2" 230 193 88