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Danfoss Types TGEX11-18/TGES12-15TR/TGEN10-30TR Thermostatic expansion valves introduction
TGE is a dedicated designed series of thermostatic expansion valves for all standard refrigerants.The tight design meets the environmental demands for today and future.Versions for non standard refrigerants can be produced to order.
Applications
• Water chillers
• Bus A/C
• Rooftop units
• Heat pumps
• Refrigerated containers
• Others A/C and refrigeration system
Danfoss Types TGEX11-18/TGES12-15TR/TGEN10-30TR Thermostatic expansion valves Features
• Refrigerants: R410A, R32, R452B, R454B, R22,R134a, R1234ze, R407F, R407A, R404A, R507,R407C and R290
• Capacity range: 3.5 – 52 TR / 12 – 182 kW for R410A
• Balance port design
• Biflow with expansion in both directions
• Low hysteresis
• Long lifetime for heat pump applications
• Mechanical connections types solder ODF,flare, MIO, ORFS are available
• Laser welded, stainless steel power element,capillary tube, and bulb
• MOP (Max. Operating Pressure) function is available
• Optional bleed function
• PS / MWP (maximum working pressure): 46 bar/ 667 psig
• Straightway flow
• Adjustable superheat setting
• Cylindrical bulb and patented bulb strap design
• Compliance with ATEX hazard zone 2
• UL certified
Danfoss Types TGEX11-18/TGES12-15TR/TGEN10-30TR Thermostatic expansion valves Design and function
Balanced port design and advantage
The TGE series of thermostatic expansion valves have balanced port design.
Balanced port design prevents changes in pressure drop across the valve from influencing operation
and provides excellent control on applications having widely varying operating conditions.
Balanced port TXV’s are recommended in refrigeration and air conditioning systems with any combi-
nations of these conditions:
1) Widely varying head pressures
2) Widely varying evaporator loads
3) Widely varying pressure drop across the TXV
4) Fluctuating or extremely low liquid temperatures
5) Intermittent liquid line flash gas
TGE valves are designed for biflow operations. TGE 10 has minor capacity reduction in reverse flow.
The central push pin is fitted with a robust seal
(Pos 4) that ensures maximum tightness for the
life of the valve.
Static superheat (SS) can be adjusted by the
setting spindle (Pos 6), see fig. 1.
The standard superheat setting (SS) is 4K / 7.2 °F
and adjustable for 0 – 8K / 0 – 14.4 °F.
SS = Static Superheat
OS = Opening Superheat
SH = SS + OS = total superheat
Example:
Static superheat SS = 4K / 7.2 °F
Opening superheat OS = 4K / 7.2 °F
The opening superheat is 4K / 7.2 °F, i.e. from
the point the valve begins to open up to rated
capacity. Opening superheat is determined by
the design and cannot be changed.
Total superheat SH = SS + OS
SH = 4 + 4 = 8K / 14.4 °F
Total superheat SH can be altered by changing SS
(by using the setting spindle).
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