04,28,2026 80 views
Double bellows differential pressure gaugeIt is one of the main products of our company, mainly used for continuously recording the instantaneous value of the measured flow rate on site. It can also accumulate the total amount of the measured flow rate within a certain time period through an accumulator. It is currently one of the differential pressure gauges used and is widely used in departments such as petroleum, chemical, metallurgy, power, and light industry.
The double bellows differential pressure gauge is mainly composed of a housing, a torque tube, a bellows, and a range spring. It has a central base, with two bellows B1 and B2 installed on both sides of the base. The bellows have rigid end caps at both ends and are rigidly connected by a connecting shaft 5 to form a whole. High pressure and low pressure measuring chambers are formed between the outer side of the two corrugated tubes and the outer shell, respectively. In order to compensate for the errors caused by temperature changes, a temperature compensation bellows B3 is connected to the bellows B1 on the high-pressure side. The inner cavity of the base is connected to the bellows B1, B2, and B3 and filled with working filling liquid (such as 50% distilled water and 50% ethylene glycol), which is sealed for a long time. B1 and B2 are interconnected through the annular gap and damping bypass between the damping ring and the central base. In the low-pressure chamber, a range spring is installed between the central base and the free end of B2, and a baffle is installed in the middle of the connection. The left side of the baffle is tightly attached to a micro ball bearing installed at the lower end of the swing rod. The upper end of the swing rod is fixed on the torque tube, and the spindle of the torque tube is connected to the instrument pointer system, driving the pointer to rotate.
Double bellows differential pressure gaugeProduct features:
1. The double corrugated tube differential pressure gauge can be used to measure parameters such as differential pressure, pressure, and liquid level during use, with reliable and stable operation and cost-effectiveness;
2. The double corrugated tube differential pressure gauge adopts welded corrugated tubes, ensuring the consistency of the effective area of high and low pressure corrugated tubes, eliminating static pressure errors, and improving measurement accuracy;
3. Equipped with a unidirectional overload protection device, it can automatically cut off the flow of filling liquid between high and low pressure corrugated pipes when unidirectional overload occurs during measurement, protecting the measuring element from damage;
4. After adopting anti-corrosion isolation measures, it can be used to measure the flow rate of corrosive media and has a damping device that can adjust the damping time.
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