Introduction:

        The butterfly plate of the clamp type butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, with a rotation angle between 0 ° and 90 °, which can play a role in flow regulation. When the butterfly plate rotates to 90 °, the valve reaches its maximum opening.

       The clamp type butterfly valve has a simple structure, small volume, and light weight, and is only composed of a few parts. And it can be quickly opened and closed by rotating 90 °, with simple operation, and the valve has good fluid control characteristics. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated through the valve is very small, so it has good flow control characteristics. Butterfly valves have two sealing types: elastic soft seal and metal seal. Elastic soft sealing valve, the sealing ring can be embedded on the valve body or attached to the periphery of the butterfly plate.

        Valves with metal seals generally have a longer lifespan than those with elastic seals, but it is difficult to achieve complete sealing. Metal seals can adapt to higher working temperatures, while elastic soft seals have temperature limitations.

        If a butterfly valve is required for flow control, the main thing is to choose the correct size and type of valve. The structural principle of butterfly valves is particularly suitable for making large-diameter valves. This type of valve should generally be installed horizontally in pipelines.

        There are two commonly used butterfly valves: clamp type butterfly valve and flange type butterfly valve. A clamp type butterfly valve is a valve that is connected between two pipeline flanges using double headed bolts. A flange type butterfly valve has a flange on the valve and bolts are used to connect the flanges at both ends of the valve to the pipeline flange.

Performance comparison:

        Which ordinary butterfly valve or gate valve with the same nominal pressure and nominal diameter has better tightness and is less prone to water leakage?

        The sealing performance of gate valves is better than that of butterfly valves, but there are also butterfly valves from manufacturers with good sealing performance.

        Gate valves have a large volume and occupy a large space.

        Butterfly valves have a small volume and occupy little space.

        When selecting, it is also necessary to consider the temperature of the medium, the sealing of the valve, and the packing.

        The standard specifies the use of disc valves with a nominal diameter greater than 50.

        The clamp type butterfly valve is a national key new product, and the high-performance manual butterfly valve adopts a double eccentric and a special inclined cone elliptical sealing structure. Solved the problem of sliding contact friction on the sealing surface of traditional eccentric butterfly valves during opening and closing from 0 ° to 10 °, achieved the effect of separating the sealing surface of the butterfly plate at the moment of opening and sealing when the contact is closed, and extended service life and optimal sealing performance.

Usage:

        Used for gas pipelines in the sulfuric acid industry: furnace front blower inlet and outlet, relay blower inlet and outlet, electric defogging series and connecting valves, S02 main blower inlet and outlet, converter regulation, preheater inlet and outlet regulation, and cut-off gas usage.

        Used in the sulfur burning, conversion, and dry suction sections of the sulfur based sulfuric acid production system, it is the preferred brand of valves for sulfur based sulfuric acid plants. It is widely regarded by users as a butterfly valve with good sealing performance, light operation, secondary corrosion, high temperature resistance, easy operation, flexibility, and safe and reliable use. It has been widely promoted and used.

        It is also widely used as a regulating and shut-off device in pipelines for media such as SO2, steam, air, coal gas, ammonia, CO2 gas, oil products, water, brine, alkaline solution, seawater, nitric acid, hydrochloric acid, sulfuric acid, phosphoric acid, etc. in industries such as chemical, petrochemical, smelting, pharmaceutical, and food.

Structural characteristics of clamp type butterfly valve:

        ① The unique design of three-way eccentricity ensures frictionless transmission between sealing surfaces, extending the service life of the valve

        ② Elastic sealing is generated by torque.

        ③The clever wedge design enables the valve to have an automatic sealing function that tightens as it closes, with compensatory and zero leakage between sealing surfaces.

        ④Small in size, light in weight, easy to operate, and easy to install.

        ⑤Pneumatic and electric devices can be configured according to user requirements to meet the needs of remote control and program control.

        ⑥The replacement of part materials can be suitable for various media and can be used for lining anti-corrosion (lining F46, GXPP, PO, etc.).。

        ⑦Diversified continuous structure: clamp, flange, butt welding.