Danfoss TUB thermostatic expansion valve, R404A/R452A, 6 mm x 12 mm solder ODF
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Product Description
Danfoss TUB universal thermostatic expansion valve, OEM P/N 068U3881. Internally equalized, stainless-steel body and capillary (fixed orifice, adjustable superheat, internally equalized). Refrigerant R404A/R452A. Nominal capacity 2.1 kW (0.6 TR) at the standard rating condition. Evaporating temperature range -15 to 10 °C. Inlet 6 mm, outlet 12 mm, Solder ODF. Static superheat 4 °C (adjustable). Capillary/bulb length 800 mm. Max working pressure 34 bar (500 psig). Angleway flow direction. Hermetic laser-welded design per EU F-gas Regulation 517/2014. EAN 5702428540353. MOP point -10 °C at MOP 50.
Technical Specifications
- Brand
- Danfoss
- Part number
- 068U3881
- Type
- TUB (fixed orifice, adjustable superheat, internally equalized)
- Category
- Expansion valves — thermostatic
- Refrigerant
- R404A/R452A
- Nominal capacity
- 2.1 kW (0.6 TR)
- Pressure equalization
- Internally equalized
- Orifice size
- 4
- Inlet connection
- 6 mm, Solder ODF
- Outlet connection
- 12 mm, Solder ODF
- Static superheat
- 4 °C (7.2 °F), adjustable
- Evaporating temperature range
- -15 °C to 10 °C (5 °F to 50 °F)
- Capillary tube / bulb length
- 800 mm
- Max working pressure
- 34 bar (500 psig)
- Body material
- Stainless steel
- Flow direction
- Angleway
- EAN
- 5702428540353
- Approvals
- UL, EAC
- Net weight
- 0.149 Kilogram
- Product group
- Expansion valves
- Approval
- EAC
- Capillary tube length [in]
- 31 in
- Capillary tube length [mm]
- 800 mm
- China RoHS compliance
- Yes with exemptions
- China RoHS exemption clause
- 7.1
- Connection material
- Bi-metal: Steel/copper
- Direction
- Straightway
- EU RoHS compliance
- Yes with exemptions
- EU RoHS exemption clause
- 6(a)
- Flow direction indicator
- Laser engraved 1-way arrow
- Fluid Group
- 2
- Inlet connection type
- Solder, ODF
- Inlet size [mm]
- 6 mm
- Max. Working Pressure [bar]
- 34 bar
- Max. Working Pressure [psig]
- 500 psig
- MOP Point [psig]
- MOP 50
- MOP Point [°C]
- -10 °C
- MOP Point [°F]
- 15 °F
- Orifice capacities [kW]
- 2.1 kW
- Orifice capacities [TR]
- 0.6 TR
- Outlet connection type
- Solder, ODF
- Outlet size [mm]
- 12 mm
- Parts included
- Bulb strap
- PED category
- Art. 4, par. 3
- Rated cap. cond. Range N [IMP]
- OS=7.2 ºF
- Rated cap. cond. Range N [SI]
- OS=4K
- REACH Candidate List substances
- Lead (CAS no. 7439-92-1)
- Refrigerants
- R404A/R452A
- Seal
- No
- Static Superheat (SS) [°C]
- 4 °C
- Static Superheat (SS) [°F]
- 7.2 °F
- Superheat setting
- Adjustable
- Temperature range [°C] [max]
- -15 °C
- Temperature range [°C] [min]
- -40 °C
- Temperature range [°F] [max]
- 5 °F
- Temperature range [°F] [min]
- -40 °F
- UL approved refrigerants
- R404A
- UL mark
- Yes
Standards & Compliance
- Size / Series
- 6 mm x 12 mm
- Material
- Stainless steel
- Pressure Rating
- 34 bar (500 psig) max working pressure
- Temperature Range
- -15 °C to 10 °C (evaporating)
- Classification / Approval
- UL, EAC
- HS Code
- 8481.80
Compatibility & Fitment
Rated for R404A/R452A. Select capacity to the evaporator load and rating condition per the TU/TC data sheet before ordering.
Product Documentation
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Technical guides
- Expansion Valve Finder — Danfoss TE 2 / TE 5 / TE 12 / TE 20 / TE 55, TGE, TUA / TUB / TUBE, T2 / TS2, AKV and ETS Colibri by Refrigerant, Connection and Type
- Cross-Referencing Danfoss Refrigeration Components by IMPA and OEM Code
- Danfoss Product Code Decoder — 003Z, 013G, 017B, 023U, 027L, 032F, 060G, 060H, 065B, 065Z, 068Z, 084H, 132F, 148B Series (Complete Reference)
Catalogue entry last verified: 2026-08-13. A manufacturer datasheet is attached to this entry — confirm application-critical values against it.
Frequently asked questions
- Where can I buy 068U3881?
- 068U3881 can be ordered from cballast.com as a Danfoss catalogue item: request a quotation on this page or email sales@cballast.com, and the order ships worldwide.
- What is the manufacturer part number for this Danfoss product?
- The manufacturer part number is 068U3881.
- What is the HS code for 068U3881?
- The customs tariff (HS) code for 068U3881 is 8481.80.
- Who manufactures 068U3881?
- 068U3881 is a Danfoss product in the HVAC & Refrigeration range.
- Is a datasheet available for 068U3881?
- Yes — the 068U3881 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for 068U3881?
- The minimum order quantity is 1.
- Is 068U3881 available?
- Yes — 068U3881 is available to order: fulfilment is from supplier stock in cBallast's European network, dispatched directly from the warehouse to the customer, with the exact lead time stated in the quotation (reply within 24 hours).