                    Super Heat Correction Factor (Ks)

        Ks for saturated steam is 1.00. This is the screen default.
        When temperature/pressure combination exceeds this, the
        program will automatically calculate required orifice area
        based on a correction factor, when manually entered from 
        the chart listed below.

        NOTE: Temperature field is a reference field only, for report
              purpose, and is not incorporated into the sizing formula.

        AGCO Type 526 POSRV & Type 86 Spring-Return SRV's are limited
        to a maximum temperature of 512 deg. F. because of the soft-
        seated design. For applications above this temperature, the
        metal-seated Type 727 should be considered.

               TYPE 727: API orifices "G" thru "T"
                         Inlet Size:   2" thru 8"
                         Temp. Range: -20 to +800 deg. F.
                         Set Press.:   50 to 1480 psig
                         Dimensions per API 526

                              
                             ORIFICE AREAS

      VALVE SIZE       TYPE 86        TYPE 526        TYPE 727    

       3/4 x 1        0.049 (-4) 
       & 1 x 1        0.196 (-8)
       1-1/2 x 2      0.503 (G)
       1-1/2 x 3                      0.841 (H) 
         2 x 3        1.287 (J)       1.375 (J)       0.503 (G)
                                                      0.785 (H)
                                                      1.287 (J)
         3 x 4                        3.073 (L)       1.287 (J)                                                      
                                                      1.838 (K)
                                                      2.853 (L)
         4 x 6                        6.848 (P)       2.853 (L)
                                                      3.600 (M)
                                                      4.340 (N)
                                                      6.380 (P)
         6 x 8                       17.149 (R)      11.050 (Q)
                                                     16.000 (R)
         8 x 10                      27.913 (T)      26.000 (T) 




                     MAXIMUM PRESSURE RATING, psig

                          Temperature, deg. F
  Flange  Mat'l. 
   Class           100   200   300   400   500   600   700   800

          C.S.     285   260   230   200   170   140   110   80
   150#          
          S.S.     275   240   215   195   170   140   110   80

          C.S.     740   675   655   635   600   550   535   410
   300#          
          S.S.     720   620   560   515   480   450   430   415

          C.S.     1480  1350  1315  1270  1200  1095  1065  825
   600#          
          S.S.     1440  1240  1120  1030  955   905   865   830

          C.S.     2220  2025  1970  1900  1795  ---   ---   ---
   900#          
          S.S.     2160  1860  1680  1540  1435  ---   ---   ---

          C.S.     3705  3375  3280  3170  2995  ---   ---   ---
  1500#          
          S.S.     3600  3095  2795  2570  2390  ---   ---   ---

          C.S.     6170  5625  5470  5280  4990  ---   ---   ---
  2500#          
          S.S.     6000  5160  4660  4280  3980  ---   ---   ---

   Carbon Steel: ASTM A216, Grade WCB
   Stainless Steel: ASTM A351, Grade CF8M
   Ratings at temperatures at and above -20 deg. F per ANSI B16.34


                        
                    STEAM SUPERHEAT CORRECTION FACTORS
                               
                        Temperature to 600 deg. F

Set Press.  340  360  380  420  440  460  480  500  520  540  560  580  600   
  psig

   15       .99  .99  .98  .97  .96  .95  .94  .93

   20       .99  .99  .98  .97  .96  .95  .94  .93

   40      1.00  .99  .99  .97  .96  .95  .94  .93

   50      1.00  .99  .99  .97  .96  .95  .94  .93  .92  .91  .90  .89  .88   	
   60      1.00  .99  .99  .97  .96  .95  .94  .93  .92  .91  .90  .89  .88      
   80           1.00  .99  .98  .97  .96  .94  .93  .92  .91  .90  .89  .88   
  100                 1.00 .99  .97  .96  .95  .94  .93  .92  .91  .90  .89   
  140                 1.00 .99  .98  .96  .95  .94  .93  .92  .91  .90  .89   
  180                 1.00 .99  .98  .96  .95  .94  .93  .92  .91  .90  .89   
  200                 1.00 .99  .99  .97  .96  .95  .93  .92  .91  .90  .89   
  220                     1.00  .99  .98  .96  .95  .94  .93  .92  .91  .90   
  280                          1.00  .99  .97  .96  .95  .93  .92  .91  .90   
  300                          1.00  .99  .98  .96  .95  .93  .92  .91  .90   
  350                               1.00  .99  .97  .96  .94  .93  .92  .91   
  400                               1.00  .99  .98  .96  .95  .93  .92  .91   
  450                                    1.00  .99  .97  .96  .94  .93  .92   
  500                                    1.00  .99  .98  .96  .94  .93  .92

  550                                         1.00  .99  .97  .95  .94  .92

  600                                         1.00  .99  .98  .96  .94  .93

  650                                              1.00  .99  .97  .95  .94

  700                                              1.00  .99  .97  .96  .94

  750                                                   1.00  .98  .96  .95

  800                                                   1.00  .99  .97  .95

  850                                                   1.00  .99  .98  .96

  900                                                        1.00  .99  .97

  950                                                        1.00  .99  .97

 1000                                                        1.00  .99  .98

 1050                                                             1.00  .99

 1100                                                             1.00  .99

 1150                                                             1.00  .99

 1200                                                             1.00  .99        






                    SUPER HEAT CORRECTION FACTORS

                   Temperature from 620-800 deg. F

Set Press.   620  640  660  680  700  720  740  760  780  800
  psig

   50        .87  .87  .86  .85  .84  .84  .83  .82  .82  .81
  
   80        .88  .87  .86  .85  .84  .84  .83  .82  .82  .81

  100        .88  .87  .86  .85  .85  .84  .83  .82  .82  .81

  160        .88  .87  .86  .86  .85  .84  .83  .82  .82  .81

  200        .88  .87  .86  .86  .85  .84  .83  .83  .82  .81

  220        .89  .88  .87  .86  .85  .84  .84  .83  .82  .81

  260        .89  .88  .87  .86  .85  .85  .84  .83  .82  .81
                           
  280        .89  .88  .87  .86  .85  .85  .84  .83  .82  .82

  300        .89  .88  .87  .86  .86  .85  .84  .83  .82  .82

  350        .90  .89  .88  .87  .86  .85  .84  .83  .83  .82

  400        .90  .89  .88  .87  .86  .85  .84  .84  .83  .82

  450        .91  .89  .88  .87  .86  .86  .85  .84  .83  .82

  500        .91  .90  .89  .88  .87  .86  .85  .84  .83  .82
 
  550        .91  .90  .89  .88  .87  .86  .85  .84  .83  .82

  600        .92  .90  .89  .88  .87  .86  .85  .84  .84  .83

  650        .92  .91  .90  .89  .87  .86  .86  .85  .84  .83

  700        .93  .91  .90  .89  .88  .87  .86  .85  .84  .83

  750        .93  .92  .90  .89  .88  .87  .86  .85  .84  .83

  800        .94  .92  .91  .90  .88  .87  .86  .85  .84  .84

  850        .94  .93  .92  .90  .89  .88  .87  .86  .85  .84

  900        .95  .93  .92  .90  .89  .88  .87  .86  .85  .84

  950        .95  .94  .92  .91  .89  .88  .87  .86  .85  .84

 1000        .96  .94  .93  .91  .90  .89  .87  .86  .85  .84

 1050        .97  .95  .93  .92  .90  .89  .88  .87  .86  .85

 1100        .98  .95  .94  .92  .91  .89  .88  .87  .86  .85

 1150        .98  .96  .94  .92  .91  .90  .88  .87  .86  .85

 1200        .98  .97  .95  .93  .91  .90  .89  .87  .86  .85

                      
                            END OF HELP

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