valve problems and the prevention of

Often happens after the factory valve problems caused by supply and demand should be the concern of both sides.

1, improper storage of

Valve can not open storage, should be placed in ventilation, dry place, the manufacturing plant, storage time should be required, to remove the valve can not be stored at both ends of the protective cover.

Lifting the valve actuator can not be as a lifting point, the attention can not be bumps flange.

2, the installation of inappropriate

Can not be used to support pipeline valves, flanges or welding to install client when the response to Qi, the pipeline to prevent stress caused by thermal expansion value.

3, improper welding

In accordance with the norms of the correct welding process;

Control of welding temperature, to prevent the sealing material damage.

Solder sealing ring before the Department with butter spread, the application of welding base to prevent welding spatter material embedded in the sealing surface.

4, start the process of the damage

Before the opening of the pipeline to be cleaned to remove dirt pipe rust, sediment, foreign body, to prevent damage to the sealing surface.

Valves can not for long remain in the semi-open semi-closed position.

Strength tests in the pipeline, be sure to complete emptying of liquid, the water valve will lead to chloride corrosion, strength test of the chloride content of the water required to control and add anti-corrosion agent.

5, the use of improper

Off valve can not be used to regulate flows, and is strictly prohibited in the semi-open semi-closed state of the use of wide-open valve position should be maintained at the location or total clearance.

6, corrosion

Selection of valve manufacturing and media must be considered H2S content and chloride content, material selection and heat treatment must comply with NACE MR-01-75 requirements

7, inappropriate choice of sealing materials

Selected as a rubber O-ring seal material, for pound Class600 level and above should be verified with optional explosion-proof vacuum (AED) of the material properties.

8, transmission problem

Valve position is not in place a recurring problem, the manufacturer must ensure that every aspect of transmission chain of the manufacturing accuracy, especially the pole then the ball valve, check valve before the factory switch location and the location of the consistency of instruction. valve ball valve gate valve check valve globe valve butterfly valve
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