RP-6 Series Steam Pressure Reducing Valve (PRV)

Image of Flanged RP-6 Series Steam Pressure Reducing Valve (PRV)
Flanged RP-6 Series Steam Pressure Reducing Valve (PRV)
Image of Threaded RP-6 Series Steam Pressure Reducing Valve (PRV)
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 plug, piston, cylinder sleeve, and spring. The piston valve consists of valve seat, plug, diaphragm, spring and adjusting spring.

Set the outlet pressure through adjusting spring, sense the change of pressure of outlet with membrane, 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.

Stucture of Flanged RP-6 Series Steam Pressure Reducing Valve (PRV)
  • 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
Leakage Quantity GB12245-1989

Materials

Name of Part Material of Parts
body, bonnet, bottom cap WCB
Seat, Plug 410 S.S.
Cylinder sleeve, Piston Al-Fe bronze
Diaphragm PH15-7Mo
Piston Ring PPL
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 65 80
Cv 1 2.5 4 6.5 9 16 25 36

Dimensions

Dimensions of Flanged RP-6 Series Steam Pressure Reducing Valve (PRV)
Dimensions of Flanged RP-6 Series Steam Pressure Reducing Valve (PRV)
Nominal Diameter DN Dimensions Connection dimensions
L H H1 PN 1.0MPa PN 1.6MPa
D K n-ф d C D K n-ф d C
15 140 160 65 95 65 414 45 12 95 65 414 45 14
20 140 160 65 105 75 414 55 14 105 75 414 55 14
25 150 168 68 115 85 414 65 14 115 85 414 65 14
32 180 185 75 135 100 418 78 16 135 100 418 78 16
40 180 185 78 145 110 418 85 16 145 110 418 85 16
50 200 193 88 160 125 418 100 16 160 125 418 100 16
65 230 208 98 180 145 418 120 18 180 145 418 120 18
80 260 228 117 195 160 418 135 18 195 160 818 135 20
Real Image of Flanged RP-6 Series Steam Pressure Reducing Valve (PRV)