Welded bellows

Temperature compensation

As the heat exchanger, corrugated tube, the main faction is strengthening the heat transfer, and also the thermal compensation and vibration. The heat transfer efficiency is mainly related to the wave shape, and the wave shape affects the forming process of the corrugated pipe.


Voltage transformer


Working coils of current transformers immerse in insulation oil tank, with environmental temperature and working current change, it will make large the temperature change range of the insulating oil .


Corrugated tube heat exchanger





Material: carbon steel/copper/thin -wall stainless steel, heat transfer coefficient is 1.2 ~ 2.4 times of common shell heat exchanger.The Special waveform section of bellows has good temperature compensation capability, tube plate thermal stress won't appear the crack failure due to large tensile stress. Bellows heat exchanger structure according to the tube sheet, shell and its matching part can be divided into the four structural types of fixed tube plate type, floating head type, kettle type, and U type, the four structural types are roughly same, the difference is mainly internal heat transfer components (heat exchanging tube ). The fixed tube-plate corrugated tube heat exchanger is suitable for temperature less than 350 ℃, pressure less than 6.4 MPa, but the highest temperature and the maximum pressure cannot appear at the same time.The Floating-head type corrugated tube heat exchanger is suitable for almost any occasion, especially in the shell mediums easily blocked occasions, this kind of heat exchanger uses more convenient. To take 1.5 ~ 2 times maximum diameter to the diameter of the small end when estimate, the liquid level height is usually higher than the upper tube at least 500 mm.

Parachute automatically release in pressure regulator.

Pressure switch built-in bellows and mechanical mechanism, when the system pressure rising or falling, the corresponding regulating spring and corrugated steel pipe generate stretching and contraction displacement, through the lever switch action, to cut off or connect the control loop.

Pressure adjustable 5 ~ 30 bar.