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Datasheet generated 2026-10-07
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Danfoss TUH hot gas bypass regulator, R410A, 3/8 in x 1/2 in solder ODF

Danfoss · HVAC & Refrigeration · Expansion Valves · Denmark · danfoss.com
Part Number
068U3750  ·  HS 8481.80
Danfoss TUH hot gas bypass regulator, R410A, 3/8 in x 1/2 in solder ODF

Danfoss TUH hot gas bypass regulator, OEM P/N 068U3750. Stainless-steel body and capillary, fixed orifice with adjustable superheat, used to inject hot gas for capacity control and to maintain a stable evaporating pressure at low load. Refrigerant R410A. Orifice assembly size 9. Nominal capacity 7.3 kW (2.1 TR) at the standard rating condition. Evaporating temperature range -1 to 10 °C (evaporating). Inlet 3/8 in, outlet 1/2 in, solder ODF. Static superheat 2 °C (adjustable). Max working pressure 45.5 bar (660 psig). Hermetic laser-welded design. EAN 5702428941563.

Technical Specifications

BrandDanfoss
Part number068U3750
TypeTUH (hot gas bypass regulator, adjustable superheat)
CategoryHot gas bypass regulator
RefrigerantR410A
Nominal capacity7.3 kW (2.1 TR)
Orifice size9
Inlet connection3/8 in, Solder ODF
Outlet connection1/2 in, Solder ODF
Static superheat2 °C, adjustable
Evaporating temperature range-1 to 10 °C (evaporating)
Max working pressure45.5 bar (660 psig)
Body materialStainless steel
EAN5702428941563
ApprovalsEAC
Net weight0.142 Kilogram
Product groupPress. and temp. regul. valves
ApprovalEAC
Capillary tube length [in]31 in
Capillary tube length [mm]800 mm
China RoHS complianceYes with exemptions
China RoHS exemption clause7.1
Connection Code(3002:X:10; 3002:X:13)
Connection materialBi-metal: Steel/copper
DirectionAngleway
EU RoHS complianceYes with exemptions
EU RoHS exemption clause6(a)
Flow directionSingle-flow
Flow direction indicatorLaser engraved 1-way arrow
Fluid Group2
Identical product068U2969
Inlet connection typeSolder, ODF
Inlet size [in]3/8 in
Max. Working Pressure [bar]45.5 bar
Max. Working Pressure [psig]660 psig
Orifice capacities [kW]7.3 kW
Orifice capacities [TR]2.1 TR
Outlet connection typeSolder, ODF
Outlet size [in]1/2 in
Parts includedBulb strap
PED categoryArt. 4, par. 3
Pressure equalizationInternally equalized
REACH Candidate List substancesLead (CAS no. 7439-92-1)
RefrigerantsR410A
SealNo
Static Superheat (SS) [°C]2 °C
Static Superheat (SS) [°F]3.6 °F
Superheat settingAdjustable
Temperature range [°C] [max]10 °C
Temperature range [°C] [min]-1 °C
Temperature range [°F] [max]50 °F
Temperature range [°F] [min]30 °F

Properties

MaterialStainless steel
Pressure rating45.5 bar (660 psig) max working pressure
Temperature range-1 to 10 °C (evaporating)
Standard size3/8 in x 1/2 in
MOQ1

Compatibility

Rated for R410A. Select capacity to the bypass load and rating condition per the TU/TC data sheet before ordering.

Approvals

Attached Documents