Sumitomo HC-4A - Helium Gas Pressures

Specifications
18
Control Logic provides:
Automatic restart after power interruption
Remote start/stop capability (using optional accessory cable).
Refrigerant Quality
Refrigerant is 99.995% pure helium gas with a dew point less than -50° C (-58° F) at 2070 kPa
(300 psig).
PRESERVE YOUR WARRANTY and AVOID CONTAMINATION.
Specifications require the use of 99.995% pure helium gas with a dew point less
than -50º C (-58º F) at 2070 kPa (300 psig). Using a lesser quality of helium can
damage the system and void the warranty.
Helium Gas Pressures
Equalization Pressure at 68
°
°°
°
F
Operating Supply Pressure
Compressor Only
1860 - 1900 kPa
(270 - 275 psig)
2070 - 2210 kPa
(300 - 320 psig)
HC
-
4A with CH
-
202 Cold
Head
1790 - 1830 kPa
(260 - 265 psig)
1930 - 2070 kPa
(280 - 300 psig)
HC
-
4A with CH
-
204S Cold
Head
1860 - 1900 kPa
(270 - 275 psig)
2000 - 2140 kPa
(290 - 310 psig)
HC
-
4A2 with RDK
-
101 and
ø½” x 20 ft. flex gas lines
1655 – 1670 kPa
(240 – 245 psig)
1860 – 2210 kPa
(270 – 320 psig)
HC
-
4A2 with RDK
-
101 and
ø½” x >20 ft. and ≤66 ft.
flex gas lines
1450 - 1480 kPa
(210 - 215 psig)
1860 - 2210 kPa
(270 - 320 psig)
Equalization Pressures at Different Ambient Temperatures:
T°
°°
° C
P psig with DE-202
Cold Head
P psig with DE
-
204SL, CH-204S, or
M204S Cold Heads
4 246 – 251 255 – 260
10 251 – 256 261 – 266
15.6 256 – 261 266 – 271
20 260 – 265 270 – 275
26.7 266 – 271 276 – 281
37.8 275 – 281 286 – 291
40 278 – 283 288 – 294
Pressure Relief Valve is set at 2760 kPa (400 psig).