DQ41F low-temperature flange ball valve is divided into two types: low-temperature floating ball and low-temperature fixed ball. It is used to cut off or connect low-temperature media in pipelines, and the low temperature of the medium should not be lower than -196 degrees.
Low temperature ball valve execution standard
design and manufacturing | Structure length | Flange size | Pressure Temperature | Experiment Inspection |
GB122237 | GB12221 | GB9113 JB79 | GB9131 | GB/T13927 JB/T9092 |
Low temperature ball valve pressure test
nominal pressure | 1.6 | 2.5 | 4.0 |
strength test | 2.4 | 3.8 | 6.0 |
Water seal test | 1.8 | 2.8 | 4.4 |
Airtight seal test | 0.4-0.7 |
Main component materials of low-temperature ball valve
valve body | WCB | ZG1Cr18Ni9Ti | CF8 | CF3 | ZG1Cr18Ni12Mo2Ti | CF8M | CF3M | |||
Spherical valve stem | 2Cr13 | 1Cr18Ni9Ti | 304 | 304L | 1Cr18Ni12Mo2Ti | 316 | 316L | |||
Valve seat | PTFE with slope fiber reinforced PTFE+Glass para polystyrene PPL | |||||||||
shim | PTFE stainless steel/flexible graphite toothed gasket | |||||||||
Valve stem seat | Polytetrafluoroethylene (PTFE) stainless steel/flexible graphite | |||||||||
filler | Polytetrafluoroethylene (PTFE) reinforced flexible graphite | |||||||||
Packing gland | WCB | 1Cr18Ni9Ti | 304 | 304L | 1Cr18Ni12Mo2Ti | 316 | 316L | |||
temperature | -40~150 | |||||||||
medium | Steam oil products | Nitric Acid | Strong oxidizing medium | Acetic acid | sulfonylureas |
Main external dimensions of low-temperature ball valve
1.6MPa | DN | L | D | D1 | D2 | b | n-φd | H | D0 |
凸面法兰RF DQ41 16C 16P 16R | 15 | 130 | 95 | 65 | 45 | 14 | 4-14 | 78 | 140 |
20 | 140 | 105 | 75 | 55 | 14 | 4-14 | 84 | 160 | |
25 | 150 | 115 | 85 | 65 | 14 | 4-14 | 95 | 180 | |
32 | 165 | 135 | 100 | 78 | 16 | 4-18 | 150 | 250 | |
40 | 180 | 145 | 110 | 85 | 16 | 4-18 | 150 | 300 | |
50 | 200 | 160 | 125 | 100 | 18 | 4-18 | 170 | 350 | |
65 | 220 | 180 | 145 | 120 | 20 | 4-18 | 195 | 350 | |
80 | 250 | 195 | 160 | 135 | 20 | 8-18 | 215 | 400 | |
100 | 280 | 215 | 180 | 155 | 20 | 8-18 | 250 | 500 | |
125 | 320 | 245 | 210 | 185 | 22 | 8-18 | 265 | 600 | |
150 | 360 | 280 | 240 | 210 | 24 | 8-23 | 270 | 800 | |
200 | 400 | 335 | 295 | 265 | 26 | 12-23 | 330 | 1200 | |
2.5MPa | 15 | 130 | 95 | 65 | 45 | 16 | 4-14 | 103 | 140 |
raised face flange RF DQ41 25 25P 25R | 20 | 140 | 105 | 75 | 55 | 16 | 4-14 | 112 | 160 |
25 | 150 | 115 | 85 | 65 | 16 | 4-14 | 123 | 180 | |
32 | 165 | 135 | 100 | 78 | 18 | 4-18 | 150 | 250 | |
40 | 180 | 145 | 110 | 85 | 18 | 4-18 | 156 | 300 | |
50 | 200 | 160 | 125 | 100 | 20 | 8-18 | 172 | 350 | |
65 | 220 | 180 | 145 | 120 | 22 | 8-18 | 197 | 350 | |
80 | 250 | 195 | 160 | 135 | 22 | 8-23 | 222 | 400 | |
100 | 280 | 230 | 190 | 160 | 24 | 8-23 | 253 | 500 | |
125 | 320 | 270 | 220 | 188 | 28 | 8-25 | 275 | 600 | |
150 | 360 | 300 | 250 | 218 | 30 | 8-25 | 286 | 800 | |
200 | 400 | 360 | 310 | 278 | 34 | 12-25 | 340 | 1200 |
4.0MPa | DN | L | D | D1 | D2 | D6 | b | n-φd | H | D0 |
Concave convex flange MFM DQ41 40 40P 40R | 15 | 130 | 95 | 65 | 45 | 40 | 16 | 4-14 | 103 | 140 |
20 | 140 | 105 | 75 | 55 | 51 | 16 | 4-14 | 112 | 160 | |
25 | 150 | 115 | 85 | 65 | 58 | 16 | 4-14 | 123 | 160 | |
32 | 180 | 135 | 100 | 78 | 66 | 18 | 4-18 | 150 | 250 | |
40 | 200 | 145 | 110 | 85 | 76 | 18 | 4-18 | 156 | 250 | |
50 | 220 | 160 | 125 | 100 | 88 | 20 | 4-18 | 172 | 350 | |
65 | 250 | 180 | 145 | 120 | 110 | 22 | 8-18 | 197 | 350 | |
80 | 280 | 195 | 160 | 135 | 121 | 22 | 8-18 | 222 | 450 | |
100 | 320 | 230 | 190 | 160 | 150 | 24 | 8-23 | 253 | 450 | |
125 | 400 | 270 | 220 | 188 | 176 | 28 | 8-25 | 275 | 600 | |
150 | 400 | 300 | 250 | 218 | 204 | 30 | 8-25 | 286 | 800 | |
200 | 550 | 375 | 320 | 282 | 260 | 38 | 12-30 | 340 | 1200 | |
6.4MPa | 15 | 165 | 105 | 75 | 55 | 40 | 18 | 4-14 | 105 | 140 |
Concave convex flange MFM DQ41 64 64P 64R | 20 | 190 | 125 | 90 | 68 | 51 | 20 | 4-18 | 125 | 160 |
25 | 216 | 135 | 100 | 78 | 58 | 22 | 4-18 | 135 | 250 | |
32 | 229 | 150 | 110 | 82 | 66 | 24 | 4-23 | 150 | 350 | |
40 | 241 | 165 | 125 | 95 | 76 | 24 | 4-23 | 165 | 350 | |
50 | 292 | 175 | 135 | 105 | 88 | 26 | 4-23 | 175 | 450 | |
65 | 330 | 200 | 160 | 130 | 110 | 28 | 8-23 | 200 | 450 | |
80 | 356 | 210 | 170 | 140 | 121 | 30 | 8-23 | 210 | 600 | |
100 | 432 | 250 | 200 | 168 | 150 | 32 | 8-25 | 250 | 700 | |
125 | 508 | 295 | 240 | 202 | 176 | 36 | 8-30 | 295 | 1100 | |
150 | 559 | 340 | 280 | 240 | 204 | 38 | 8-34 | 340 | 1500 |
Tel: 15351513006
Landline: 0515-89118577
Fax: 0515-8911 8000
Email: jtongcn 126.com
Address: Oubei Pump and Valve Industrial Park, Binhai Economic Development Zone, Jiangsu Province
15351513006