BTN85-150GC Series: A Quietly Versatile Gas Burner for Global Plants

When engineers look for a gas burner that can cover the 135 – 1 521 kW band without forcing them to over-size or under-size the plant, the BTN85-150GC line from Baite is often the short-list candidate. The series keeps a low profile on the boiler room floor, yet it ships in two control philosophies—Two-Stage Progressive and fully Modulating—so the same casing can follow two very different control strategies.

Two Control Modes, One Hardware Package

• Two-Stage Progressive gives a simple high / low / off sequence that still beats single-stage cycling; the burner pauses at an intermediate point before ramping to full rate, trimming excess wear on valves and fans.
• Modulating hands the load to a 0-10 V or 4-20 mA signal; a servo-motor rides the cam disc to track demand in near real-time, holding O₂ below 3 % through most of the curve.

Switching from one mode to the other is a software jumper and a new cam; no manifold swap is required, so an OEM can quote the same model in markets where modulating drives are either standard or still considered optional.

135 – 1 521 kW in Three Steps

Three frame sizes share one envelope (≈ 1 000 mm × 1 010 mm × 755 mm) and a common flange drilling, letting specifiers cover:

• BTN85GC: 135 – 814 kW
• BTN120GC: 150 – 1 163 kW
• BTN150GC: 372 – 1 521 kW

All three accept NG, LPG or CNG without changing the nozzle; only the gas train needs resizing, which Baite supplies as a bolt-on module to meet local pressure regulations.

Head Design That Forgives Real-World Ductwork

Air and gas mix at the blast-pipe rather than in a remote mixer, so the flame shortens and the furnace pressure becomes easier to balance. A hinged burner hood swings left or right; the fan, servo and gas valve stay on the door, giving maintenance staff a clear corridor without breaking the flange.

Servo-Driven Economy

A single three-phase motor (1.1 kW, 1.5 kW or 2.2 kW depending on frame) drives the fan. The same shaft carries a cam that positions both air damper and gas butterfly, eliminating the separate “light-off” actuator found on older designs. The arrangement cuts electrical draw by roughly 12 % against parallel-actuator layouts and trims the panel to an IP40 box little larger than two shoeboxes.

Emissions Ready

With the standard head the burner stays under 120 mg NOₓ @ 3 % O₂ on natural gas. If local codes tighten, an optional staged gas tip drops the number to < 80 mg without external FGR, keeping the package compact for retrofit jobs where space beside the boiler is already claimed by pipe racks.

Take-away

If your specification calls for 135 – 1 521 kW of clean, gas-fired heat and you would rather not maintain two separate burner lines, the BTN85-150GC gives you both step-fired simplicity and full modulation in one casing. Fit it, choose the mode that matches the BMS, and let the burner spend the next decade proving that “quiet” does not have to mean “under-powered.”