Fukui Seisakusho là nhà sản xuất van an toàn hàng đầu ở Nhật Bản
Đa số các nhà máy nhiệt điện ở Việt Nam đều đang sử dụng van an toàn của hãng Fukui.
Với nhiều năm kinh nghiệm cung cấp van
Sản phẩm của Fukui có thể được chia ra làm 03 dòng chính sau
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Spring-loaded Pressure-relief Valves
Generally, the safety valveｓ are referred to the Spring-loaded Pressure-relief valves, the most common type ( See the left figure ).
The load of the spring is designed to press the "Disc" against the inlet pressure.
Depending on the fluid type, such as steam, gas or liquid, we are offering a Bellows model to clear the back pressure effect
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Pilot-operated Pressure-relief Valves
Pilot-operated Pressure-relief Valves are composed of Pilot Assy and Main Valve. Although Spring-loaded Pressure-relief valves adopts the force of the spring against the inlet pressure, the reliving pressure and reseating pressure of the Pilot-operated Pressure-relief Valves is controlled by Pilot Assy, which acts nearly as same as Spring-loaded Pressure-relief valves. There is no adjusting function in the Main Valve.
Pilot-operated Pressure-relief Valves have larger size variations compared to Spring-loaded type, which is applied in a severe condition such as high pressure
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Dead-Weight Pressure-relief Valves
In case the design pressure of the pressure vessel is set at very low pressure, Dead-weight Pressure-relief valve adjusts relieving pressure only by the disc weight.
The Vacuum relief valve has been adopting this functional characteristic which absorbs the pressure when the inside of the pressure vessel falls into a negative pressure
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