Preparation Before Installation**

Environmental Inspection

Confirm that the installation environment meets explosion-proof requirements (such as gas concentration, dust grade), ensuring no accumulation of flammable or explosive gases.

- Verify that the well or pond's depth and diameter match the pump size to prevent inadequate heat dissipation or mechanical collisions due to insufficient space.

-Clear out silt, gravel, and other debris at the well bottom to prevent blockages in the water intake or wear on the pump body.

2. **Equipment and Accessories Inspection

- Verify pump label parameters (voltage, power, explosion-proof grade, etc.) match the application scenario, ensuring the equipment complies with national explosion-proof certification (e.g., Ex d I Mb).

- Inspect that cables, seals, bolts, and other accessories are complete without damage, and the explosion-proof joints must not have scratches or rust.

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### **II. Key Points During Installation**

1. Power and Cable Handling

- Utilize explosion-proof cables with a durable outer sheath that offers tensile, wear-resistant, and corrosion-resistant properties.

The cable connections must be made through a** explosion-proof junction box**to ensure a tight seal of the joints, preventing moisture or gas from seeping in.

The grounding wire must be connected separately to a reliable grounding device, with the grounding resistance ≤ 4Ω, to avoid the risk of leakage.

2. **Pump Mounting and Sealing**

- Vertical lifting of pump using stainless steel chains or corrosion-resistant slings, with an inclination angle ≤ 3° to prevent impeller eccentric wear.

- The outlet and pipe connection is sealed with a ** explosion-proof flange + rubber gasket**, and the bolts are evenly tightened symmetrically to prevent leakage.

- Install a **clog-proof filter screen** (pore size ≤ particle diameter allowed by the pump) at the water intake, and perform regular cleaning and maintenance.