BQG490/0.1

BQG 490/0.1 — Mining Duty Air Operated Double Diaphragm Pump

The BQG 490/0.1 is the largest frame of the BSK mining duty pneumatic diaphragm pump series, rated for 903 L/min at a maximum outlet pressure of 0.83 MPa. It runs on compressed air only — no electric motor, no shaft seal, no rotating element in contact with the slurry — which makes it the first choice for the wet, abrasive and potentially hazardous duties found underground and on the mine surface. The large valve chambers and full-bore ports of the 490 frame are built for sustained high-flow transfer where the smaller 220 and 410 frames would be running at their limit.

Solids up to 9 mm pass straight through the valve chambers without straining or clogging, and the gentle diaphragm action does not shear or degrade the slurry. The pump is run-dry safe, self-primes from a dry suction line up to 5.3 m, and can be fully submerged in sumps, pits and shafts. The air motor carries the MA mining product safety certification required for underground coal and metal mine service.

BQG 490/0.1 mining duty air operated double diaphragm pump — front view

Key Features

• Air motor advantages — professional air-distribution (air champ) design cuts air consumption and running cost per litre pumped
• Abrasion resistant — ceramic-material chip valve and hardened air components for long service life on slurry duty
• Corrosion resistant — surface coating on wetted and external parts for the damp, acidic mine environment
• Low noise — exhaust chamber with integrated muffler holds operation at approximately 75 dB @70 psi
• Leak tight — resistance sealing and groove-seal structure with bolt clamping for stable air performance
• Heavy duty construction — reinforced cast iron body and flanged feet for high-flow duty and permanent installation
• Run-dry and self-priming — safe to run against a closed discharge, no priming required after the first charge
• Stepless flow control — regulate output from zero to maximum simply by throttling the air supply

Large frame manifold and diaphragm chamber layout — three quarter view

Typical Applications

• Draining the working face and gallery or tunnel dewatering
• Guniting for gallery walls and backfill slurry transfer
• Mill discharge, cyclone feed and thickener underflow
• Tailings transfer and high-volume pipeline transfer from the process plant
• Sump, pit and shaft dewatering where flow demand is highest
• Filter press feed and flotation reagent, acid or cyanide leach solution dosing

Performance Specifications

BQG 490/0.1 rear view — BSK and MA certification nameplate

Materials of Construction

The BQG 490/0.1 is available with wetted parts in cast iron, stainless steel, aluminum alloy or PP / PVDF. Diaphragm, ball and seat materials are selected against the actual slurry — neoprene, nitrile (Buna-N), EPDM, PTFE or Viton — so that chemical attack, swelling and abrasion are all covered by one order. Let us know the pH, solids content and particle size of your duty and we will specify the combination.

Why BSK

BSK Fluid Technology manufactures and exports air operated double diaphragm pumps for mining, mineral processing, chemical and wastewater duty. Every mining pump leaves our works with a pressure and air-consumption test record, and we support installations worldwide with spare parts, diaphragm kits and commissioning advice.

Request a quotation: tell us the model, wetted-material preference, diaphragm material and quantity, and we will reply with price, lead time and shipping terms.