Q647FM-16C Pneumatic Fixed Drain Ball Valve

Q647FM-16C Pneumatic Fixed Drain Ball Valve

1. Product introduction:

The valve is a low-pressure valve made of cast steel, with a wear-resistant seal as the sealing surface. The structure of the ash unloading ball valve and the fixed ball valve are basically the same. Both upper and lower shafts fix the center of the ball on the center point. Under the pressure of the medium, there will be no displacement. The sealing material is made of PPL, which is not only resistant to high temperature, but also has good wear resistance. There is a spring at the bottom of the sealing ring, so its pre-tightening performance is very reliable, and its automatic compensation function is also very good.

When the number of times of opening and closing of the valve reaches a certain value, the sealing surface will be worn out. At this time, the spring at the bottom of the sealing ring will automatically compensate for the worn gap. This is the automatic compensation function. The difference of the ball valve is: there is only one sealing ring. When the valve is opened, the medium enters from one end of the sealing ring and the other end is the outlet. At this time, a blowing effect will be produced at the outlet.

The ball of the pneumatic dust unloading ball valve is fixed and does not move after being pressed. The fixed ball valve is equipped with a floating valve seat. After the pressure of the medium, the valve seat moves, so that the sealing ring is pressed tightly on the ball to ensure sealing. Bearings are usually installed on the upper and lower shafts of the sphere, and the operating torque is small, which is suitable for high-pressure and large-diameter valves.

2. Use restrictions:

Temperature and pressure limits

l The nameplate shows the maximum allowable operating pressure of the ball valve at the maximum and minimum operating temperatures.

l Valve seats and seals made of PTFE or RTFE are used, and the operating temperature should be between -290C and 2000C. The operating temperature of other types of valve seats and seals should be checked by the KI factory.

l The nominal pressure rating (PN) of the valve can indicate the maximum working pressure of the valve under normal temperature conditions. (For example: PN4.0, indicating that the maximum working pressure when the operating temperature is -290C～380C is 40 Bar (4.0MPa)).

l For the precautions of electric or pneumatic actuators, please refer to their corresponding instructions.

3. Installation:

1). Remove the protective covers on both sides of the flange, and rinse and clean with the valve fully opened.

2). The whole machine should be tested according to the specified signal (electrical or pneumatic) before installation (to prevent vibration from affecting the performance due to transportation), and then it can be installed online (wiring according to the wiring diagram of the electric actuator).

3) Before preparing to connect with the pipeline, flush and remove the remaining impurities in the pipeline (these substances may damage the valve seat and ball).

4) During installation, please do not use the actuator part of the valve as a lifting point to avoid damage to the actuator and accessories. .

5) This type of valve should be installed in the horizontal or vertical direction of the pipeline.

6). The pipeline near the installation point must not sag or bear external forces. Pipe supports or supports can be used to eliminate the deviation of the pipeline.

7) After connecting with the pipeline, please cross-lock the flange connecting bolts with the specified torque.

Fourth, operation and use:

1). Make sure that the pipeline and valve have been flushed before operation.

2) The operation of the valve drives the valve stem to complete rotation according to the size of the input signal of the actuator: when it rotates 1/4 turn (900) in the forward direction, the valve is closed. When reverse rotation 1/4 turn (900), the valve opens.

3) When the direction indicating arrow of the actuator is parallel to the pipeline, the valve is in the open state; when the indicating arrow is perpendicular to the pipeline, the valve is in the closed state.

5. Maintenance:

Having a long service life and maintenance-free period will depend on the following factors: normal working conditions, maintaining a harmonious temperature/pressure ratio, and reasonable corrosion data.

Note: When the ball valve is closed, there is still a pressurized fluid inside the valve body.

Before servicing, relieve the line pressure and keep the valve in the open position.

Before servicing, disconnect the power or air supply.

Before maintenance, lock the actuator and the bracket separation piece, install the pipeline according to the valve flow direction, and then it can be used normally.

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