The differential pressure instrument adopts double bellows structure, that is, the two bellows are respectively installed on the symmetrical positions on both sides of the “work” type bracket. The upper and lower ends of the “work” shaped support are the movable end and the fixed end respectively, and the middle is connected by a spring sheet; the two bellows are in a parallel state and are respectively connected with the high and low pressure connectors on the case; the gear transmission mechanism It is directly installed on the fixed end of the bracket and is connected with the movable end of the bracket through a pull rod; the dial is directly fixed on the gear transmission mechanism.

The working principle of the instrument: Based on the pressure sensing element adopts two corrugated tubes with the same rigidity, therefore forcing the same concentrated force to act on the movable support under the same medium to be measured, respectively, because the two sides of the spring sheet are under the effect of the equal moment. No interference is generated, so the stand is still in its original position, so that the gear transmission mechanism does not move, so that the pointer is still pointing at the zero position.

When different pressures are applied (usually the high pressure end is higher than the low pressure end), the force of the two bellows acting on the movable support is not equal, so that a corresponding displacement is generated respectively, and the gear transmission is driven and amplified to be deflected by the pointer. Indicates the differential pressure between the two.

Specifications