The mechanism for opening the lid of the firecracker and fixing it in the open position is lateral (МУ-1, МУ-2) and upper (MUv) versions.

The control mechanism is used to remotely open and close the cracker from the roof or wall of the tank. Through a cable (rod), a drum and a flywheel, the operator lifts the lid of the firecracker and fixes it in the open position, and if necessary, gently lowers it without entering the tank.
The side version МУ-1 is used with pipes DN 80-250, МУ-2 — DN 400-600; the upper version of the MUv is mounted on the roof. The body, drum and cable are made of steel; the structure is designed for long—term operation as part of tank equipment.
| Type | Flapper control mechanism (side/top) |
|---|---|
| Purpose | Opening the lid of the flapper and locking in the open position |
| Product range | МУ-1 (DN 80-250), МУ-2 (DN 400-600), MUv (upper) |
| Actuator | Flywheel, cable/rod, drum |
| Material | Steel |
| Installation | On the tank wall/roof |
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