A48SC Type Pound-grade full lift spring loaded safety valve
A. Pound-grade full lift spring loaded safety valve Main property and specification
Normal Pressure PN 150 300 600 900 1500 2500
Body strength Ps (MPa) 3.0 7.5 15 22.5 35 38
Set pressure Pk (MPa) 0.1~2 1.6~5 3.2~10 8~15 10~25 10~25
Seal pressure Pm 90%Pk
Reseating pressure Ph ≥90%Pk
Relieving pressure Pp ≤1.1Pk
Lift H (mm) ≥1/4 do
  Appropriate temperature C ≤420℃
I ≤500℃
V ≤540℃
Appropriate medium Steam
Code of throat diameter
Code Diameter Code Diameter
D 10 L 50
E 13 M 55
F 16 N 60
G 20.5 P 72
H 26 Q 96
J 33 R 115
K 40 T 148
A48SC Type Pound-grade full lift spring loaded safety valve
B. Pound-grade full lift spring loaded safety valve Main Dimension
A48sC150
Normal
Diameter DN (in)
Dimension(mm)
do D D1 D2 b t z-¢d DN’ D’ D1’ D2’ b’ t’ z-¢d’ L L1 H
1/2’’×3/4’’ D 89 60.5 35 12 6 4-15 20 98 70 43 14 1.6 4-15 90 90 380
3/4’’ ×1’’ D 98 70 43 14 6 4-15 25 108 79.5 51 15 1.6 4-15 96 92 390
1’’ ×1 1/2’’ D 108 79.5 51 15 7 4-15 40 127 98.5 73 18 1.6 4-15 115 105 395
1’’ ×2’’ D 108 79.5 51 15 7 4-15 50 152 120.5 92 18 1.6 4-19 115 105 395
1 1/2’’ ×2’’ G 127 98.5 73 18 6 4-15 50 152 120.5 92 18 1.6 4-19 121 124 420
1 1/2’’ ×2 1/2’’ G 127 98.5 73 18 6 4-15 65 178 139.5 105 20 1.6 4-19 121 124 420
1 1/2’’ ×3’’ G 127 98.5 73 18 6 4-15 80 190 152.5 127 22 1.6 4-19 124 130 430
2’’ ×2 1/2’’ H 152 120.5 92 18 6 4-19 65 178 139.5 105 20 1.6 4-19 124 130 460
2’’ ×3’’ J 152 120.5 92 18 6 4-19 80 190 152.5 127 22 1.6 4-19 124 130 460
2 1/2’’ ×4’’ H 178 139.5 105 20 7 4-19 100 229 190.5 157 24 1.6 8-19 143 137 480
3’’ ×4’’ L 190 152.5 127 22 10 4-19 100 229 190.5 157 24 1.6 8-19 162 156 530
4’’ ×6’’ N 229 190.5 157 24 12 8-19 150 279 241.5 216 26 1.6 8-22 229 181 310
6’’ ×8’’ P 279 241.5 216 26 10 8-22 200 343 298.5 270 29 1.6 8-22 241 240 780
8’’ ×10’’ R 343 298.5 270 29 10 8-22 250 406 362 324 31 1.6 12-25 279 276 840
12’’ ×14’’ T 483 432 381 32 10 12-25 350 533 476 413 35 1.6 12-28 370 360 980

A48sC 300, A48Sc300I
Normal
Diameter DN (in)
Dimension(mm)
do D D1 D2 b t z-¢d DN’ D’ D1’ D2’ b’ t’ z-¢d’ L L1 H
12/’’ ×3/4’’ D 95 66.5 35 15 6 4-15 20 98 70 43 14 1.6 4-15 90 90 380
3/4’’ ×1’’ D 117 82.5 43 16 10 4-19 25 105 79.5 51 15 1.6 4-15 96 92 390
1’’ ×1 1/2’’ D 124 90 51 18 7 4-19 40 127 98.5 73 18 1.6 4-15 115 105 395
1’’ ×2’’ D 124 90 51 18 6 4-19 50 152 120.5 92 18 1.6 4-19 115 105 395
1 1/2’’ ×2’’ F 156 114.5 73 20 6 4-22 50 152 120.5 92 18 1.6 4-19 121 124 420
1 1/2’’ ×2 1/2’’ F 156 114.5 73 20 9 4-22 65 178 139.5 105 20 1.6 4-19 121 124 420
1 1/2’’ ×3’’ F 156 114.5 73 20 6 4-22 80 190 152.5 127 22 1.6 4-19 124 130 430
2’’ ×2 1/2’’ H 165 127 92 22 6 8-19 65 178 139.5 105 20 1.6 4-19 124 130 460
2’’ ×3’’ H 165 127 92 22 6 8-19 80 190 152.5 127 22 1.6 4-19 124 130 460
2 1/2’’ ×4’’ J 190 149.5 105 24 7 8-22 100 229 190.5 157 24 1.6 8-19 143 137 480
3’’ ×4’’ L 210 168 127 28 10 8-22 100 229 190.5 157 24 1.6 8-19 162 156 430
4’’ ×6’’ N 254 200 157 32 12 8-22 150 279 241.5 216 26 1.6 8-22 229 181 610
6’’ ×8’’ P 318 270 216 38 10 12-22 200 343 298.5 270 29 1.6 8-22 241 240 780
8’’ ×10’’ Q 381 330 270 42 10 12-25 250 406 362 324 31 1.6 12-25 279 276 840
Remark: 150Lb for outlet flange

A48sC600, A48Sc600I
Normal
Diameter DN (in)
Dimension(mm)
do D D1 D2 b t z-¢d DN’ D’ D1’ D2’ b’ t’ z-¢d’ L L1 H
3/4’’×1’’ D 117 82.5 43 16 10 4-19 25 108 79.5 51 15 1.6 4-15 96 92 400
1’’ ×2’’ D 124 90 51 19 6 4-19 50 152 120.5 92 18 1.6 4-19 115 105 420
1 1/2’’ ×2’’ F 156 114.5 73 22 10 4-22 50 152 120.5 92 18 1.6 4-19 152 124 440
1 1/2’’ ×2 1/2’’ F 156 114.5 73 22 9 4-22 65 178 139.5 105 20 1.6 4-19 152 214 440
1 1/2’’ ×3’’ F 156 114.5 73 22 6 4-22 80 190 152.5 127 22 1.6 4-19 152 124 450
2’’ ×2 1/2’’ H 165 127 92 26 6 8-19 65 178 139.5 105 20 1.6 4-19 162 154 480
2’’ ×3’’ H 165 127 92 26 6 8-19 80 190 152.5 127 22 1.6 4-19 162 154 480
2 1/2’’ ×4’’ H 190 149.5 105 29 7 8-22 100 229 190.5 157 24 1.6 8-19 143 165 490
3’’ ×4’’ K 210 168 127 32 10 8-22 100 229 190.5 157 24 1.6 8-19 162 155 540
4’’ ×6’’ N 273 215.9 157 38 12 8-25 150 279 241.5 216 26 1.6 8-22 210 200 620
6’’ ×8’’ R 356 292 216 46 10 12-28 200 343 298.5 270 29 1.6 8-22 241 240 790
Remark: 150Lb for outlet flange

WA48sC900, A48Sc900I
Normal
Demeter DN (in)
Dimension(mm)
Do D D1 D2 b t z-¢d DN’ D’ D1’ D2’ B’ T’ z-¢d’ L L1 H
1 1/2’’ ×2’’ F 178 124 73 32 10 4-28 50 152 120.5 92 18 1.6 4-19 115 124 440
2’’ ×3’’ H 216 165.1 92 38 10 8-25 80 190 152.5 127 22 1.6 4-19 162 154 480
3’’ ×4’’ J 241 190.5 127 38 10 8-25 100 229 190.5 157 24 1.6 8-19 181 184 550
4’’ ×6’’ K 292 235 150 44 12 8-32 150 279 241.5 216 26 1.6 8-22 222 197 630
Remark: 150Lb for outlet flange

WA48Sc1500, A48Sc1500I
Normal
Demeter DN (in)
Dimension (mm)
do D D1 D2 b t z-¢d DN’ D’ D1’ D2’ b’ t’ z-¢d’ L L1 H
1’’ ×1 1/2’’ D 150 101.6 51 28 15 4-25 40 156 114.5 73 20 1.6 4-22 125 125 420
1 1/2’’ ×1 1/2’’ E 178 124 73 32 14 4-28 40 156 114.5 73 20 1.6 4-22 150 194 450
1 1/2’’ ×2’’ E 178 124 73 32 15 4-18 50 165 127 92 22 1.6 8-19 150 194 450
1 1/2’’ ×3’’ E 178 124 73 41 7 4-29 80 210 268.5 127 31 1.6 8-22 155 254 450
Remark: 300Lb for outlet flange

WA48sC2500, A48sC2500V
Normal
Demeter DN (in)
Dimension(mm)
do D D1 D2 b t z-¢d DN’ D’ D1’ D2’ b’ t’ z-¢d’ L L1 H
1 1/2’’ ×2 1/2’’ F 205 146 73 45 7 4-32 65 190 149 105 27 1.6 8-22 165 140 670
Remark: 300Lb for outlet flange

The technical data subject to amend without notice