The valve has a connection between the clamp and the flange. What's the difference between this and the connection?
Flange expensive point, to clip type cheap point, should make no difference. Mainly in the demolition of the clip type pipe in the media will flow out, waste. Flange type can be closed to avoid the flow of media!
The clamp is used for small caliber, and the flange is basically big bore and big pressure.
To clip type, general caliber is small, pressure is not big. Flanges are suitable for large bore, and others have been answered
The clamp valve is not connected to its own way, rely on the pipe on the two flanges to clamp the valve, which is suitable for low pressure pipeline; flange valve, the valve itself with flanges, and the pipe flange butt