Q641w pneumatic discharge ball valve is a kind of discharge ball valve with special structure. The valve seat is close to the end face flange, with less material retention, compact structure and superior sealing performance. It is used in the reaction pot of fine chemical industry, pharmaceutical industry and chemical industry, and can also be used for conveying fine and soft particles. Using ppl sealing material, more wear-resistant, is the most ideal product for vacuum paste pot in toothpaste industry.

1. The poor uniformity of potassium carbonate liquid results in the blockage of feeding pipe and intermittent feeding phenomenon, which makes the centrifuge vibrate.
2. The angle of the discharge valve cannot be adjusted, and the rotating speed of the centrifugal drum is too fast. When feeding, the material overflows and the human body is easy to be scalded (the temperature of potassium carbonate liquid is about 70 ℃);
3. The discharge valve is located at the top of the centrifuge. When discharging, it should be inclined. It is not easy to operate.

Main structural connection dimensions of q641w pneumatic discharge ball valve（mm)

DiameterDN		G	L	L1	D	K	n-Φd	H	W
mm	in
25	1″	G1″	72	22	100	78	4-Φ10	160	140
40	1 1/2″	G1/2″	92	31	130	100	4-Φ12	18/0	164
50	2″	G2″	112	41	150	130	4-Φ14	220	190
65	2 1/2″	G21/2″	125	46	190	155	4-Φ14	250	210
80	3″	G3″	160	57	205	170	4-Φ14	275	247
100	4″	G4″	175	68	235	200	4-Φ18	310	276

Preparation before installation of pneumatic ball valve:
1. Ensure that the installation position of the pneumatic pipeline ball valve is in the coaxial position, and the two flanges on the pipeline shall be kept parallel to confirm that the pipeline can bear the weight of the pneumatic pipeline ball valve. If it is found that the pipeline can not bear the weight of the pneumatic pipeline ball valve, the corresponding support shall be provided for the pipeline before installation.
2. To confirm whether there are impurities and welding slag in the pipeline, the pipeline must be blown clean.
3. Check the name plate of the pneumatic pipeline ball valve, and operate the pneumatic pipeline ball valve fully open and closed for several times to confirm that the valve can work normally, and then check all details of the valve once again to ensure that the valve is intact.
4. Remove the protective covers at both ends of the valve, check whether the valve body is clean, and clean the inner cavity of the valve body. Since the sealing surface of the ball valve in the pneumatic pipeline is ball shaped, even small impurities may cause damage to the sealing surface.
Installation of pneumatic pipeline ball valve:
1. Any section of the pneumatic pipeline ball valve can be installed at the upstream end, and the handle pneumatic pipeline ball valve can be installed at any position of the pipeline. If the pneumatic pipeline ball valve with actuator (such as gearbox and electro pneumatic actuator) is equipped, it must be vertically installed, and the inlet and outlet of the valve shall be in horizontal position.
2. The sealing gasket shall be installed between the flange of the ball valve and the flange of the pipeline according to the design requirements of the pipeline.
3. The bolts on the flange shall be tightened symmetrically, successively and evenly.
4. If pneumatic and electric actuators are adopted for pneumatic pipeline ball valve, the installation of air source and power supply shall be completed according to the manual.
Inspection after installation of pneumatic pipeline ball valve:
1. After the installation, start the pneumatic pipeline ball valve to open and close several times. The action should be flexible and the force should be uniform. The pneumatic pipeline ball valve should work normally.
2. According to the design requirements of the pipeline pressure, the sealing performance of the joint surface between the pneumatic pipeline ball valve and the pipe flange is tested after pressurization.