1
Share:
Muller GTA Series Industrial Dual Blow Unit Cooler
High-Capacity Dual Throw Evaporator for Commercial & Industrial Refrigeration
The Muller GTA Series is an industrial dual blow / dual throw unit cooler designed for large temperature-controlled spaces, processing areas and commercial refrigeration applications. The range combines large Ø630 mm fans, 4.23 mm fin spacing and multiple 4-, 6- and 8-row coil configurations, with published SC2 performance data for R404A and R22.
Designed as a large industrial dual-discharge unit cooler, the GTA Series uses a white pre-painted galvanized-steel casing and is available in nine model configurations. The published range covers two, three and four Ø630 mm fan arrangements together with 4-, 6- and 8-row coils. The coil configurations are optimized for direct-expansion applications, while glycol-water application is identified as an available option.
📌 GTA Series at a Glance
✨ GTA Series Design Features
Dual Blow Air Distribution
Industrial dual-discharge construction distributes conditioned air in two directions across the refrigerated area.
Ø630 mm Fans
The published GTA range uses Ø630 mm, 380V / 3PH / 50Hz fans in two-, three- and four-fan configurations.
Galvanized-Steel Casing
Standard construction uses a white pre-painted galvanized-steel casing.
Hinged Drain Pans
Removable drain pans are fixed by hinges, with condensate evacuated through two large drain pipes.
Easy Service Access
Removable end covers provide convenient access for installation and maintenance.
Serviceable Fan Panels
Fan units are mounted on articulated panels to simplify maintenance work.
🔎 GTA Model Range
The published GTA range combines 2-, 3- and 4-fan configurations with 4-, 6- and 8-row coil arrangements.
⚡ Delta & Star Fan Operation
890 r/min
The catalogue provides a Delta operating point at 890 r/min, with corresponding airflow, air throw, power, current and SC2 cooling capacity.
690 r/min
The Star operating point is published at 690 r/min, providing a separate lower-speed performance point for each GTA model.
🌡️ SC2 Standard Rating Condition
📊 GTA Series Technical Performance
Published performance at SC2. D = Delta connection at 890 r/min; Y = Star connection at 690 r/min.
| Model | Surface m² |
Internal Volume dm³ |
No. of Rows |
Fan Dia. mm |
No. of Fans |
Motor Connection |
Total Power W |
Total Current A |
Air Throw m |
Air Flow m³/h |
R404A kW @ SC2 |
R22 kW @ SC2 |
Optional Heater W |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BGTA24R6 | 130 | 25.2 | 4 | 630 | 2 | D | 1,200 | 2.40 | 2×12 | 17,770 | 27.1 | 26.1 | 13,500 |
| Y | 800 | 1.36 | 2×10 | 13,770 | 23.5 | 22.5 | |||||||
| BGTA26R6 | 195 | 37.8 | 6 | 630 | 2 | D | 1,200 | 2.40 | 2×11 | 16,780 | 30.9 | 29.6 | 13,500 |
| Y | 800 | 1.36 | 2×9 | 12,750 | 26.2 | 25.1 | |||||||
| BGTA28R6 | 260 | 50.4 | 8 | 630 | 2 | D | 1,200 | 2.40 | 2×10 | 15,920 | 34.7 | 33.3 | 13,500 |
| Y | 800 | 1.36 | 2×8 | 11,930 | 28.8 | 27.6 | |||||||
| BGTA34R6 | 195 | 37.8 | 4 | 630 | 3 | D | 1,800 | 3.60 | 2×12 | 26,650 | 40.1 | 38.5 | 20,700 |
| Y | 1,200 | 2.04 | 2×10 | 20,540 | 34.8 | 33.4 | |||||||
| BGTA36R6 | 292 | 56.7 | 6 | 630 | 3 | D | 1,800 | 3.60 | 2×11 | 25,180 | 49.7 | 47.7 | 20,700 |
| Y | 1,200 | 2.04 | 2×9 | 19,130 | 41.5 | 39.9 | |||||||
| BGTA38R6 | 390 | 75.7 | 8 | 630 | 3 | D | 1,800 | 3.60 | 2×10 | 23,880 | 52.3 | 50.2 | 20,700 |
| Y | 1,200 | 2.04 | 2×8 | 17,900 | 43.1 | 41.4 | |||||||
| BGTA44R6 | 260 | 50.4 | 4 | 630 | 4 | D | 2,400 | 4.80 | 2×12 | 35,540 | 54.7 | 52.5 | 27,000 |
| Y | 1,600 | 2.72 | 2×10 | 27,390 | 47.1 | 45.2 | |||||||
| BGTA46R6 | 390 | 75.7 | 6 | 630 | 4 | D | 2,400 | 4.80 | 2×11 | 33,570 | 62.1 | 59.6 | 27,000 |
| Y | 1,600 | 2.72 | 2×9 | 25,510 | 52.8 | 50.7 | |||||||
| BGTA48R6 | 520 | 100.9 | 8 | 630 | 4 | D | 2,400 | 4.80 | 2×10 | 31,840 | 70.2 | 67.3 | 27,000 |
| Y | 1,600 | 2.72 | 2×8 | 23,860 | 57.8 | 55.5 |
🧮 Room Temperature Correction Factors
Published GTA Series room-temperature correction factors.
⚙️ Standard Construction & Available Options
EBM AC Motor
EBM AC motor is identified as the standard motor configuration.
Galvanized-Steel Casing
White pre-painted galvanized-steel casing.
4.23 mm Fin Spacing
6 FPI / 4.23 mm fin spacing is standard.
Blue Fin Coating
Blue-fin coating is listed as an optional fin treatment.
Black Electrophoresis Coating
Black electrophoresis fin coating is available as an option.
Stainless-Steel Casing
Stainless-steel casing is listed as an alternative option.
Insulated Double Drain Pan
Insulated double drain-pan construction is available.
Electrical Defrost
Electrical defrost for coil and drain pan is available.
Hot Gas Defrost
Hot-gas coil defrost with electrical drain-pan defrost is listed as an option.
Fan Wiring
Fan wiring is listed as an optional configuration.
Water Defrost
Water defrost is marked as unavailable in the reference catalogue.
Other Listed Motors
Interlink and Ziehl-Abegg motors are marked N/A for this GTA configuration.
📐 Dimensions, Connections & Net Weight
Published connection sizes are product inlet/outlet dimensions. Actual refrigerant connecting-line dimensions should be calculated according to the application.
View Model Connections & Net Weight
| Model | Liquid Inlet OD, inch |
Suction Outlet OD, inch |
Net Weight kg |
|---|---|---|---|
| BGTA24R6 | 1 1/8" | 1 3/8" | 260 |
| BGTA26R6 | 1 1/8" | 1 5/8" | 292 |
| BGTA28R6 | 1 3/8" | 1 5/8" | 316 |
| BGTA34R6 | 1 3/8" | 2 1/8" | 349 |
| BGTA36R6 | 1 5/8" | 2 1/8" | 395 |
| BGTA38R6 | 1 5/8" | 2 1/8" | 433 |
| BGTA44R6 | 1 5/8" | 2 1/8" | 457 |
| BGTA46R6 | 1 5/8" | 2 1/8" | 506 |
| BGTA48R6 | 1 5/8" | 2 5/8" | 549 |
🏭 Typical GTA Series Applications
🎯 Information Required for GTA Model Selection
For accurate selection, compare the actual refrigeration-system conditions with the published SC2 performance.
Need Help Selecting a Muller GTA Series Unit Cooler?
Send us your required cooling capacity, room temperature, evaporating temperature, refrigerant, room dimensions and application. We can assist in comparing the GTA Series 2-, 3- and 4-fan configurations and the published SC2 performance for your refrigeration project.
Inquiry - Muller Dual Throw GTA Series
