FAG Bearing
Valves such as globe valves, throttle valves, pressure reducing valves, and check valves are directional. If the throttle valve is installed in reverse, it will affect the effect and life. If the pressure reducing valve does not work, it will not work. The return valve can even be dangerous.
Generally, the valve has a direction mark on the valve body; if it is not, it should be correctly identified according to the working principle of the valve.
The valve chamber of the stop valve is asymmetrical to the left and right, and the fluid should be passed from bottom to top through the valve port, so that the fluid resistance is small (determined by the shape), the labor is turned on (because the medium pressure is upward), and the medium is not pressed after the closing, which is convenient for maintenance. . This is why the stop valve can't be reversed. Other valves also have their own characteristics.
The position where the valve is installed must be convenient for operation; even if the installation is temporarily difficult, it is necessary for the operator's long-term work.
It is best to have the valve handwheel and the chest (usually 1.2 meters away from the operating floor), so that the opening and closing of the valve is more labor-saving. The floor valve hand wheel should be facing up, do not tilt, so as to avoid awkward operation. The valve against the wall machine should also leave room for the operator to stand. It is necessary to avoid the operation of the sky, especially acid and alkali, toxic media, etc., otherwise it is very unsafe.
Do not flip the gate valve (ie, the handwheel is down), otherwise the medium will remain in the bonnet space for a long time, which will easily corrode the valve stem and is contraindicated for certain process requirements. It is inconvenient to replace the packing at the same time
1. The pressure reducing valve should be installed upright on the horizontal pipe, and should not be tilted in all directions.
2. Lifting check valve, ensure that the valve flap is vertical when installing, so as to be flexible.
3. Swing-type check valve, the shaft level should be ensured during installation, so that the swinging is flexible.
4. Open the gate valve, do not install it in the ground, otherwise the exposed valve stem will be corroded due to moisture.
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Does it look glossiness?Does it feel smooth?Does it make any noise?
A high quality Deep Groove Ball Bearing must be hypefine grinded with smooth surface, no burrs on the edges,running fast &noiseless, that is the feature of our products.
They have low friction and are optimized for low noise and low vibration which enables high rotational speeds.They accommodate radial and axial loads in both directions, are easy to mount, and require less maintenance than other bearing
types.
1.Deep Groove Ball Bearing
2.Self-aligning Ball Bearing
3.Cylindrical Roller Bearing
4.Spherical Contact Bearing
5.Angular Contact Bearing
6.Tapered Roller Bearing
7.Thrust Ball Bearing
8.Insert Bearing
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Shijiazhuang Longshu Mechanical & Electrical Equipment Trading Co., Ltd. , https://www.longsbearings.com