Alloy check valve: the key to guarding the heart of industry

As a key protective device for industrial fluid systems, alloy check valves have material properties and performance advantages including corrosion resistance, high temperature stability, mechanical strength and sealing.

In terms of corrosion resistance, nickel-based alloys such as Hastelloy can resist corrosion from strong acids, strong alkalis and high-temperature media, and are suitable for harsh environments such as chemical industry and nuclear energy; aluminum alloys show excellent oil resistance and oxidation resistance in oil systems such as gasoline and diesel.

In terms of high temperature stability, nickel-based alloys can still maintain mechanical strength and sealing performance in high-temperature environments above 300°C, and are suitable for high-temperature crude oil pipelines in refineries and cooling systems for nuclear power plants; while stainless steel materials such as 304/316L have both corrosion resistance and structural stability under high pressure and high humidity conditions.

In terms of mechanical strength and sealing, the lift check valve achieves rapid opening and closing through a vertical valve disc design, and the internal thread structure is suitable for high-pressure small-diameter pipelines; the swing check valve uses the kinetic energy of the medium flow to automatically control opening and closing, and is suitable for industrial scenarios with large flow and low resistance.

The core application areas include the chemical/petroleum industry, among which the typical scenario is concentrated sulfuric acid and hydrochloric acid pipelines. The technical solution uses Hastelloy B series check valves to resist highly corrosive media.

In the cooling water system and high-temperature steam pipelines in the nuclear energy/power field, nickel-based alloy valves can withstand high temperatures and radiation environments of 290°C; and in the fuel delivery system of automobile manufacturing, aluminum alloy one-way check valves can effectively prevent oil circuit backflow and impurity intrusion. In the water supply and drainage network and fire protection system of municipal engineering, stainless steel lift check valves ensure the one-way stable transmission of water flow.

In terms of selection and maintenance, the following principles should be followed:

Medium matching: For highly corrosive environments, nickel-based alloy materials are preferred; if the medium is viscous, swing-type valves should be avoided.

Pressure level: Forged valve bodies should be used for high-pressure pipelines, while casting molding can be selected for low-pressure applications to reduce manufacturing costs.

In terms of maintenance management, the following measures are recommended:

Periodic lubrication: Inject special lubricating oil into the valve every six months to reduce wear between the valve disc and the valve seat.

Fault warning: The new intelligent valve is integrated with wear monitoring function, which can provide real-time feedback on the working status of components through the data interface.