Connection form of high pressure hose and precautions for tapered seals

First, the hose joint form can be roughly divided into internal threaded form and external threaded form

1) Internal thread form

This structure is generally suitable for applications where the working pressure is relatively low and large. This connection allows the diameter of the hose to increase proper, and its sealing is mainly dependent on the seal.

2) External thread form


This structure is mainly used under high pressure conditions, and is mostly used for the working pressure over 1800 bar. In this connection method, the lock nut is pressed by the outer threaded connector, so that the tapered sealing surface of the pipe segment is closely bonded to the sealing surface of the connector, and plays a sealing action. The connected parts can also be an injection accessory such as a high pressure spray gun, a flat cleaning nozzle, a three-dimensional rotary nozzle, and the like. And other high pressure hoses. This connection method can effectively prevent loosening from the connection under complex construction conditions.

Second, the hose assembly adopts a conical seal

1) The cone angle of this connection is 60 degrees, and the tube end tapered angle is generally less than 1 degree of the hole tape.

2) The position of the tube must be maintained sharp and cannot be blind;

3) The thread direction between the tube end and the lock nut should be opposite to the external threaded joint;

4) When the joint is machined, the drain hole should be reserved at the seal to prevent the high pressure water from leaking when the cone seal is not testeeously. This allows both the role of safety warning, and it is easy to observe and judge, thereby better protecting the sealing surface from being damaged.

Connection form of high pressure hose and precautions for tapered seals