The LN2/LHe Facility was established in June of 1975 expressly
for the purpose of supporting research at the University of Wisconsin - Madison Campus.Our location is on the College of Engineering Campus - Engineering Hall.
Our yearly cryogen sales are approximately 56,700 liters of LHe and 8,000 liters of LN2.
Other Services Supplied: Helium Gas Recovery, Cryogenic Consulting and Helium Leak Detection.
We support over 700 researchers on the UW Campus with LHe.
We do not accept checks, or credit cards.
We are not affiliated with the UW Materials Distribution Services (MDS)!
We do not fill party balloons!
We do not consult regarding "Cryonics". . . Please do not ask!
Helium is a non-renewable resource. The world is running out. Learn about helium recovery.
LN2/LHe FACILITY CHARGES:
Please Note:"LN2" means Liquid Nitrogen
"LHe" means Liquid Helium
"Internal" means U.W. Users
"External" means Non-U.W. Users ~ A company in the immediate Madison area,
or visitors to the UW. Either must be supporting research at, or through the UW.
Less than 160 liters per transfer: $2.00/Liter (LN2 not transferred into a 160 liter dewar)
160 Liter Dewar: $64.00
180 Liter Dewar: $72.00
Less than 160 liters per transfer: $3.00/Liter (LN2 not transferred into a 160 liter dewar)
160 Liter Dewar: $96.00
180 Liter Dewar: $108.00
Minimum Volume Billed: 3 liters in a given month
All quantities are billed in 1 liter increments!
Self Service at the LN2 Facility
We Do Not Deliver LN2 Dewars!
We Do Not Rent LN2 Dewars!
LIQUID HELIUM: Rates effective October 1, 2011
Dewar Delivery Charges:
INSIDE a four mile radius from the Facility:
Internal Rate: $6.50/Delivery (Includes dewar return)
External Rate: $9.66/Delivery
OUTSIDE a four mile radius from the Facility:
* Deliveries and Returns are charged separately at a Minimum Rate of One Hour.
Emergency Delivery Charges *:
* Emergency Deliveries are charged a Minimum Rate of One Hour.
Same Day - During Regular Working Hours: No Charge
Same Day - AFTER Regular Working Hours: $65.00/Hour
Same Day - During Regular Working Hours: Appropriate Delivery Charge Applies
Same Day - AFTER Regular Working Hours: $130.00/Hour
Contaminated Dewar Charges*:
*Against the full volume of the dewar.
Returned empty, but cold (77K, or lower): Plus 25% of full volume
Returned warm (above 77 K), or with a valve left open: Plus 45% of full volume
Consulting Rates* (Cryogenics and Helium Leak Detection):
* Consulting Rates are charged a Minimum Rate of One Hour per LHe Facility Staff Member.
During Regular Working Hours:
Internal: $75.00/Hour/LHe Facility Staff Member
External: $150.00/Hour/LHe Facility Staff Member
After Regular Hours: $85.00/Hour/LHe Facility Staff Member
Weekend Hours: $90.00/Hour/LHe Facility Staff Member
Holidays: $100.00/Hour/LHe Facility Staff Member
External: Call for Charges
LN2/LHe FACILITY EQUIPMENT DATA:
LN2 FACILITY:Capacity: 9200 gallons
LN2 Storage Tank: (LN2 Supplier: Airgas)
Operating Pressure: 50 p.s.i.g.
Transfer Lines: (Maximum Flow Capacity @ 1500 Liters/Day)
Rigid Vacuum Jacketed (By: Minnesota Valley Engineering): 60 Feet Long
Flexible Vacuum Insulated (By: Vacuum Barrier): 600 Feet with Two User Stations, but expandable for a Third User.
In-house LN2 Manifold:
Two Station: This system is all Self-Service and User Friendly.
Liquefier Capacity (with LN2 Precooling):
XX Liters/Hour LHe with Pure Helium
XX Liters/Hour LHe with the Purifier on Recovered Helium
Purifier Capacity (with LN2 Precooling):
Removes Impurities Totaling Up To 20%
Rotary Screw Compressor (By: Linde LLC):
Motor: 60 Hz, 3 phase, 460 volt, 90 kW
Compressor Throughput Capacity: 220 scfm, or 17.5 grams/sec.
Helium Recovery Compressor (By: Sauer Compressors USA):
Model WP 4341, Air-cooled (3 each):
Motor: 60 Hz, 3 phase, 480 volt, XX horsepower
Compressor Throughput Capacity: XX scfm @ XXXX psig
LHe Dewar Capacities (Outer Shell Construction):
Storage Dewars Facility Storage Only :
One 1,000 Liter (To operate with the liquefier.)
Three @ 500 Liters/each (Carbon Steel - In Storage)
Service Dewars User Service:
Three @ 500 Liters/each (Stainless Steel)
Six @ 250 Liters/each (Stainless Steel)
Eleven @ 100 Liters/each (Stainless Steel)
Ten @ 65 Liters/each (Two Aluminum & Four Stainless Steel)
Two @ 58 Liters/each (Carbon Steel)
Four @ 35 Liters/each (Stainless Steel)
In-house Recovery Bag Capacity (By: FlexiLiner Corp.):
One bag @ 1500 ft.3
Pure : 51,668 ft.3 @ 70oF & 3000 p.s.i.g. (In Six new 4,000 p.s.i.g. ASME tubes)
Recovered: 112,632 ft.3 @ 70oF & 3,300 p.s.i.g. (In Twelve new 4,000 p.s.i.g. ASME tubes)
Pure Helium Supplier: Linde LLC
Purity as delivered: 99.999%