EnviroDive Diving, Training and Nitrox Gas Blending Gear
   Diving Training & Nitrox Gas Equipment


Helium Blending Tables

Enviro Dive Services
Helium Mixing Tables for 3500 PSI cylinders
(HeliAir, HeliTrox and TriMix)

These tables are Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.

Please click on a link below to jump directly to your required table

Helium & 21% (Air)- 3500 PSI Cylinders
Helium & 22% EANx - 3500 PSI Cylinders
Helium & 23% EANx - 3500 PSI Cylinders
Helium & 24% EANx - 3500 PSI Cylinders
Helium & 25% EANx - 3500 PSI Cylinders
Helium & 26% EANx - 3500 PSI Cylinders
Helium & 27% EANx - 3500 PSI Cylinders
Helium & 28% EANx - 3500 PSI Cylinders
Helium & 29% EANx - 3500 PSI Cylinders
Helium & 30% EANx - 3500 PSI Cylinders
Helium & 31% EANx - 3500 PSI Cylinders
Helium & 32% EANx - 3500 PSI Cylinders
Helium & 33% EANx - 3500 PSI Cylinders
Helium & 34% EANx - 3500 PSI Cylinders
Helium & 35% EANx - 3500 PSI Cylinders
Helium & 36% EANx - 3500 PSI Cylinders

Helium & 21% EANx - 3500 psi Cylinders

    Helium & 21% (Air) 3500 psi cylinder      
    psi psi psi psi psi psi psi psi
Start with Helium 700 800 900 1000 1100 1200 1300 1400
Top with Air 2800 2700 2600 2500 2400 2300 2200 2100
                   
    % % % % % % % %
Helium 0.200 0.229 0.257 0.286 0.314 0.343 0.371 0.400
Oxygen 0.168 0.162 0.156 0.150 0.144 0.138 0.132 0.126
Nitrogen 0.632 0.609 0.587 0.564 0.542 0.519 0.497 0.474
                   
END PO2 fsw fsw fsw fsw fsw fsw fsw fsw
93 0.8 124 130 136 143 150 158 167 177
109 0.9 144 150 157 165 173 182 192 203
125 1.0 163 171 179 187 196 206 217 229
140 1.1 183 191 200 209 219 230 242 255
                   
Hypoxic above 3.00 4.00 6.00 7.00 9.00 11.00 12.00 15.00



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Helium & 22% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 22% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 22 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.157 0.151 0.145 0.138 0.132 0.126
Nitrogen 0.557 0.535 0.513 0.490 0.468 0.446
               
END PO2 fsw fsw fsw fsw fsw fsw
101 0.9 156 164 172 182 192 203
116 1.0 177 186 195 206 217 230
130 1.1 198 208 218 230 242 256
145 1.2 219 230 241 253 267 282
               
Hypoxic above 5.00 7.00 9.00 10.00 12.00 15.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 32 30 29 28 27 25
Top with Air 2468 2370 2271 2172 2073 1975



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Helium & 23% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 23% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 23 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.164 0.158 0.151 0.145 0.138 0.131
Nitrogen 0.550 0.528 0.506 0.484 0.462 0.440
               
END PO2 fsw fsw fsw fsw fsw fsw
107 1.0 168 176 185 195 206 218
121 1.1 188 197 207 218 230 243
135 1.2 208 218 229 241 254 268
149 1.3 228 239 251 264 278 293
               
Hypoxic above 4.00 5.00 7.00 9.00 11.00 13.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 63 61 58 56 53 51
Top with Air 2437 2339 2242 2144 2047 1949



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Helium & 24% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 24% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 24 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.171 0.165 0.158 0.151 0.144 0.137
Nitrogen 0.543 0.521 0.499 0.478 0.456 0.434
               
END PO2 fsw fsw fsw fsw fsw fsw
100 1.0 160 168 176 186 196 208
113 1.1 179 188 197 208 219 232
126 1.2 198 208 218 230 242 256
139 1.3 217 228 239 251 265 280
               
Hypoxic above 2.00 4.00 5.00 7.00 9.00 11.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 95 91 87 84 80 76
Top with Air 2405 2309 2213 2116 2020 1924



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Helium & 25% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 25% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 25 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.179 0.171 0.164 0.157 0.150 0.143
Nitrogen 0.536 0.514 0.493 0.471 0.450 0.429
               
END PO2 fsw fsw fsw fsw fsw fsw
105 1.1 170 179 188 198 209 221
118 1.2 189 198 208 219 231 244
130 1.3 207 217 228 240 253 267
143 1.4 226 237 248 261 275 290
               
Hypoxic above 1.00 2.00 4.00 5.00 7.00 9.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 127 122 116 111 106 101
Top with Air 2373 2278 2184 2089 1994 1899



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Helium & 26% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 26% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 26 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.186 0.178 0.171 0.163 0.156 0.149
Nitrogen 0.529 0.507 0.486 0.465 0.444 0.423
               
END PO2 fsw fsw fsw fsw fsw fsw
110 1.2 180 189 199 209 221 234
122 1.3 198 208 218 230 242 256
134 1.4 216 226 237 250 263 278
146 1.5 234 245 257 270 284 300
               
Hypoxic above   1.00 2.00 4.00 6.00 7.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 158 152 146 139 133 127
Top with Air 2342 2248 2154 2061 1967 1873



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Helium & 27% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 27% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 27 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.193 0.185 0.177 0.170 0.162 0.154
Nitrogen 0.521 0.501 0.480 0.459 0.438 0.417
               
END PO2 fsw fsw fsw fsw fsw fsw
114 1.3 189 199 209 220 232 245
126 1.4 207 217 227 239 252 266
137 1.5 224 234 246 259 273 288
148 1.6 241 252 265 278 293 309
               
Hypoxic above     1.00 2.00 4.00 6.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 190 182 175 167 159 152
Top with Air 2310 2218 2125 2033 1941 1848



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Helium & 28% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 28% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Top with EANx 28 2500 2400 2300 2200 2100 2000
               
    % % % % % %
Helium 0.286 0.314 0.343 0.371 0.400 0.429
Oxygen 0.200 0.192 0.184 0.176 0.168 0.160
Nitrogen 0.514 0.494 0.473 0.453 0.432 0.411
               
END PO2 fsw fsw fsw fsw fsw fsw
107 1.3 182 190 200 211 222 235
118 1.4 198 208 218 230 242 256
129 1.5 215 225 236 248 262 276
139 1.6 231 242 254 267 281 297
               
Hypoxic above       1.00 3.00 5.00
               
    Trimix Table He/O2/Air
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500
Add Oxygen 222 213 204 195 186 177
Top with Air 2278 2187 2096 2005 1914 1823



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Helium & 29% EANx - 3500 psi Cylinders

Copyright 2001-2005 by Bart Bjorkman/EnviroDive Services 1-800-491-3328, All Rights Reserved.
    Helium & 29% EANx 3500 psi cylinder  
    psi psi psi psi psi psi
Start with Helium 1000 1100 1200 1300 1400 1500