Description
Fan overview
The explosion-proof performance of explosion-proof pneumatic axial fans (hereinafter referred to as pneumatic fans) complies with the provisions of “General Requirements for Explosion proof Electrical Equipment for Explosive Environments” and “Explosion proof Electrical Devices for Explosive Spaces”. This regulation is for explosion-proof type
The explosion-proof mark is d IIBT, which is suitable for Class 1, A, B, T1, T2, T3, T4, temperature group, explosive environment formed by combustible gas and air.
Use
Model meaning
Parameter
| Model | Noise dB(A) |
Consumption （m³/h) | Volume （m³/h) | Working pressure (mpa) |
Speed (r/min) | Air pressure (pa) | Diameter (mm) |
| BTF(BSTQ)-II-50 | 73 | 2.2 | 9000 | 0.6 | 1500 | 200 | 500 |
Installation
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Before installation, thoroughly inspect the fan for physical damage, deformation, or loose components. . Ensure all accessories (e.g., mounting brackets, screws) are included and undamaged.
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The fan’s motor housing and chassis must be reliably grounded. Use a three-core cable with a dedicated grounding wire. After wiring, seal the terminal chamber with the provided rubber gasket to maintain explosion-proof integrity. Use a dedicated explosion-proof switch or install a standard switch in a non-hazardous area.
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Mount the fan securely to a rigid foundation using the provided bolts. For wall-mounted installations, ensure the bracket is firmly anchored. Avoid forcing the base into alignment; use shims to level the unit. The fan’s impeller clearance from the housing must be uniform (typically 1–3 mm) to prevent contact during operation.
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If connecting to ductwork, use flexible joints to isolate vibrations. The duct’s weight must not be supported by the fan housing; install additional support brackets for the duct. Attach a protective grille at the air intake to prevent foreign object ingress.
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After wiring, energize the fan briefly to confirm the rotation direction matches the arrow marked on the housing. Reverse the phase connections if the rotation is incorrect. Prohibit reverse operation, as it may cause overheating or mechanical failure.
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During installation or maintenance, protect the fan’s explosion-proof joints (e.g., flanges, cable glands) from scratches or contamination. Apply anti-corrosion coating (e.g., 204-1 rust-proof oil) to exposed metal surfaces. Replace damaged gaskets or seals immediately to maintain compliance
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After installation, run the fan for 30 minutes under no-load conditions. Monitor for abnormal noise, vibration, or overheating. Check that the current draw does not exceed the rated value (typically listed on the nameplate). Adjust the mounting if excessive vibration is detected.
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Retain the fan’s explosion-proof certificate and installation manual for regulatory audits. Label the installation site with the fan’s model, voltage, and maintenance schedule. Schedule annual inspections to verify insulation resistance, bearing lubrication, and structural integrity.
Note： All installations must comply with local safety regulations (e.g., standards for explosive atmospheres). Only qualified personnel familiar with explosion-proof equipment should perform installation and maintenance.
9.The exhaust fan in use should be frequently cleaned of dust and other accumulations on the motor to avoid affecting heat dissipation.
10.When the exhaust fan that has not been used for a long time is re-used, it should be checked again according to the instructions, and it can be used only after being qualified.
Product images
