Compact

More documents

Recommendations

Info

Type 462 HDD Determination of coefficent of discharge in case of lift restriction or back pressure Diagram for evaluation of ratio of lift / flow diameter (h/d 0 ) in reference to the coefficient of discharge (K dr /α w ) h = Lift [mm] d 0 = Flow diameter [mm] of selected safety valve, refer to table article numbers h/d 0 = Ratio of lift / flow diameter p a0 = Back pressure [bar a ] p 0 = Set pressure [bar a ] p a0/p 0 = Ratio of back pressure / set pressure K dr = Coefficient of discharge acc. to DIN EN ISO 4126-1 α w = Coefficient of discharge acc. to AD 2000-Merkblatt A2 K b = Back pressure correction factor acc. to API 520 topic 3.3 d 0 Ø 9 mm d 0 Ø 13 mm 0,85 K dr = α w = f (h/d 0 ) – S/G 0,85 K dr = α w = f (h/d 0 ) – S/G Coefficient of discharge K dr / αw 0,80 Ratio of lift / flow diameter h / d 0 0,24 Ratio of lift / flow diameter h / d 0 0,75 0,75 0,65 0,70 0,55 0,65 0,45 0,60 0,35 0,55 0,50 0,25 0,45 0,15 0,10 0,15 0,20 0,25 0,05 0,1 0,15 Coefficient of discharge K dr / αw 0,19 0,2 d 0 Ø 9 mm d 0 Ø 13 mm 0,65 K dr = α w = f (h/d 0 ) – L 0,60 K dr = α w = f (h/d 0 ) – L 0,60 0,55 Coefficient of discharge K dr / αw Ratio of lift / flow diameter h / d 0 0,24 Ratio of lift / flow diameter h / d 0 0,55 0,55 0,45 0,50 0,40 0,45 0,35 0,30 0,40 0,25 0,35 0,20 0,30 0,15 0,10 0,15 0,20 0,25 0,05 0,1 Coefficient of discharge K dr / αw 0,15 0,19 0,2 Diagram for evaluation of ratio of the coefficient of discharge (K dr /α w ) in reference to the ratio of back pressure / set pressure (p a0 /p 0 ) d 0 Ø 9 mm d 0 Ø 13 mm 0,9 K dr = α w = f (p a0 /p 0 ) and K b = f (p a0 /p 0 ) 0,9 K dr = α w = f (p a0 /p 0 ) and K b = f (p a0 /p 0 ) 1,10 Type 462 HDD Coefficient of discharge K dr / αw 0,8 0,8 1,00 Ratio of back pressure / set pressure p a0 / p 0 0,66 Ratio of back pressure / set pressure p a0 / p 0 0,90 0,7 0,7 0,80 0,6 0,6 0,70 0,5 0,60 0,5 0,4 0,50 0,4 0,40 0,3 0,3 0,30 0,2 0,2 0,20 0,1 0,10 0,1 0,0 0,00 0,0 0,2 0,3 0,4 0,5 0,6 0,7 0,3 0,4 0,5 0,6 0,7 Back pressure correction factor K b Coefficient of discharge K dr / αw 0,8 0,83 1,00 0,90 0,80 0,70 0,60 0,50 0,40 0,30 0,20 0,10 0,00 Back pressure correction factor K b How to use please refer to page 00/08 08/18 LWN 481.01-E
Accessories and Options Contents Chapter/Page Overview 09/02 Caps and Levers 09/04 Threaded connections 09/06 Flanged connections 09/07 Sealing surface 09/08 Soft seal material selection 09/10 Heating jacket 09/11 Balanced bellows 09/12 O-ring damper 09/14 Lift indicator 09/16 Lift restriction 09/17 Options LWN 481.01-E 09/01
Page 1 and 2:
Compact Performance Safety Relief V
Page 3 and 4:
General Type 437 Orifice diameter d
Page 5 and 6:
Contents Type 459 05/01 Materials
Page 7 and 8:
General Information General Applica
Page 9 and 10:
Valve finder General How to find th
Page 11 and 12:
Valve selection General Valve size
Page 13 and 14:
How to use General Sample Determina
Page 15 and 16:
How to use General 7 Base of capaci
Page 17 and 18:
Sour gas service (H 2 S) General No
Page 19 and 20:
Type Type 437 Type 437 Packed knob
Page 21 and 22:
Type 437 Available designs - materi
Page 23 and 24:
Type 437 Type 437 4 5 6 Options Doc
Page 25 and 26:
Type 437 How to order - Article num
Page 27 and 28:
Type 437 Dimensions and weights - M
Page 29 and 30:
Type 437 Dimensions and weights - U
Page 31 and 32:
Type 437 Order information - Spare
Page 33 and 34:
Type 437 Approvals Type 437 Approva
Page 35 and 36:
Type 437 Capacities - Air Capacitie
Page 37 and 38:
Type 437 Determination of coefficen
Page 39 and 40:
Type Type 438 Packed knob H4 Conven
Page 41 and 42:
Page 43 and 44:
Type 438 4 5 6 Options Documentatio
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Type 438 Approvals Approvals Actual
Page 55 and 56:
Type 438 Determination of coefficen
Page 57 and 58:
Type 439 Packed knob H4 Type 439 Sa
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Type 439 Pressure temperature ratin
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
Type 439 Available Options Male thr
Page 71 and 72:
Type 439 Capacities Capacities acco
Page 73 and 74:
Accessories and Options Contents Ch
Page 75 and 76:
Accessories and Options Caps and le
Page 77 and 78:
Accessories and Options Available c
Page 79 and 80:
Accessories and Options Sealing sur
Page 81 and 82:
Accessories and Options Heating jac
Page 83 and 84:
Type Type 459 Plain lever H3 459 Sa
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Type 459 Pressure temperature ratin
Page 97 and 98:
Page 99 and 100:
Type 459 Approvals Europe Approvals
Page 101 and 102:
Type 459 Capacities - US Units Capa
Page 103 and 104:
Type 459 HDD Safety Relief Valves H
Page 105 and 106:
Type 459 HDD Available designs - ma
Page 107 and 108: Type 459 HDD 4 5 6 Options Document
Page 109 and 110: Type 459 HDD How to order - Article
Page 111 and 112: Type 459 HDD Dimensions and weights
Page 115 and 116: Type 459 HDD Order information - Sp
Page 117 and 118: Type 459 HDD Approvals Europe Appro
Page 119 and 120: Type 459 HDD Capacities - US Units
Page 121 and 122: Type Type 462 Plain lever H3 462 Sa
Page 123 and 124: Type 462 Available designs - materi
Page 125 and 126: Type 462 4 5 6 Options Documentatio
Page 127 and 128: Type 462 How to order - Article num
Page 129 and 130: Type 462 Dimensions and weights - M
Page 131 and 132: Type 462 Dimensions and weights - U
Page 133 and 134: Type 462 Pressure temperature ratin
Page 135 and 136: Type 462 Order information - Spare
Page 137 and 138: Type 462 Approvals Europe Approvals
Page 139 and 140: Type 462 Capacities - US Units Capa
Page 141 and 142: Type 462 HDD Safety Relief Valves H
Page 143 and 144: Type 462 HDD Available designs - ma
Page 145 and 146: Type 462 HDD 4 5 6 Options Document
Page 147 and 148: Type 462 HDD How to order - Article
Page 153 and 154: Type 462 HDD Order information - Sp
Page 155 and 156: Type 462 HDD Approvals Europe Appro
Page 157: Type 462 HDD Capacities - US Units
Page 161 and 162: Accessories and Options Overview Op
Page 163 and 164: Accessories and Options Caps and le
Page 165 and 166: Accessories and Options Available c
Page 167 and 168: Accessories and Options Sealing sur
Page 169 and 170: Accessories and Options Heating jac
Page 171 and 172: Accessories and Options Balanced be
Page 173 and 174: Accessories and Options O-ring damp
Page 175 and 176: Accessories and Options Lift restri
show all

Compact

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?