A41C Type Pound-grade low lift spring loaded safety valve
A. Pound-grade low lift spring loaded safety valve Main property and specification
Normal Pressure PN 150 300 600 900 1500
Body strength Ps (MPa) 3.0 7.5 15 22.5 38
Set pressure Pk (MPa) 0.1~2 1.6~5 3.2~10 8~15 10~25
Seal pressure Pm 90%Pk
Reseating pressure Ph ≥90%Pk
Relieving pressure Pp ≤1.1Pk
Lift H (mm) ≥1/20 do
Appropriate temperature C ≤300℃
P、R ≤200℃
Appropriate medium Air, Oil, Steam, Water, Corrosive medium
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
A41C Type Pound-grade low lift spring loaded safety valve
B. Pound-grade low lift spring loaded safety valve Main Dimension
A41C150, A41C150P, A41C150R
Normal Diameter DN (in) Dimension(mm)
do D D1 D2 b t z-¢d DN’ D’ D1’ D2’ t’ b’ z-¢d’ L L1 H
1/2”×1/2" D 89 60.5 35 12 6 4-15 15 89 60.5 35 1.6 12 4-15 90 90 260
3/4”×1” D 98 70 43 14 6 4-15 25 108 79.5 51 1.6 15 4-15 96 92 280
1”×1” D 108 79.5 51 15 9 4-15 25 108 79.5 51 1.6 15 4-15 100 100 290
1”×2” E 108 79.5 51 15 9 4-15 50 152 120.5 92 1.6 18 4-19 114 105 290
1 1/2”×1 1/2” G 127 98.5 73 18 10 4-15 40 127 98.5 73 1.6 18 4-15 110 115 330
1 1/2”×2” G 127 98.5 73 18 10 4-15 50 152 120.5 98 1.6 18 4-19 110 115 330
2“”×3” J 152 120.5 92 18 10 4-19 80 190 152.5 127 1.6 22 4-19 124 130 350

C. A41C Type Pound-grade low lift spring loaded safety valve
A41C300, A41C300P, A41C300R
Normal Diameter DN (in) Dimension(mm)
do D D1 D2 b t z-¢d DN’ D’ D1’ D2’ t’ b’ z-¢d’ L L1 H
1/2’’×1/2’’ D 95 66.5 35 15 6 4-15 15 89 60.5 35 1.6 12 4-15 90 90 260
3/4’’×1’’ D 117 85.5 43 16 10 4-19 25 108 79.5 51 1.6 15 4-15 96 92 280
1’’×1’’ D 124 90 51 18 6 4-19 25 108 79.5 51 1.6 15 4-15 100 100 290
1’’×2’’ E 124 90 51 18 6 4-19 50 152 120.5 92 1.6 18 4-19 114 105 290
1 1/2’’×1 1/2’’ G 156 114.5 73 20 9 4-22 40 127 98.5 73 1.6 18 4-15 110 115 330
1 1/2’’×2’’ G 156 114.5 73 20 9 4-22 50 152 120.5 92 1.6 18 4-19 110 115 330
2’’×3“ J 165 127 92 22 8 8-19 80 190 152.5 127 1.6 22 4-19 124 130 350
Remark: 150Lb for outlet flange

A41C600, A41C600P, A41C600R
Normal DiameterDN (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 6 4-15 25 108 79.5 51 15 1.6 4-15 105 110 280
1’’ ×2’’ D 124 90 51 20 9 4-19 50 152 120.5 92 18 1.6 4-19 115 105 290
1 1/2’’ ×1 1/2’’ F 156 114.5 73 22 10 4-22 40 127 98.5 73 18 1.6 4-15 147 165 330
1 1/2’’ ×2’’ F 156 114.5 73 22 10 4-22 50 152 120.5 92 18 1.6 4-19 147 165 350
Remark: 150Lb for outlet flange

A41C600, A41C600P, A41C600R
Normal DiameterDN (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 4-22 125 125 320
1 1/2’’ ×1 1/2’’ F 178 124 73 32 14 4-28 40 156 114.5 73 20 1.6 4-22 150 194 350
1 1/2’’ ×2’’ F 178 124 73 32 15 4-28 50 165 127 92 22 1.6 8-19 140 105 350
Remark: 300Lb for outlet flange

The technical data subject to amend without notice