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Mistakes in valve installation
Did you know about the 9 mistakes in valve installation? Let's take a look!
1. Bolts are too long
On the bolts on the valve, only one or two threads are longer than the nut. This can reduce the risk of damage or corrosion.
2. Control valves are not isolated separately
Although isolation valves take up valuable space, they allow personnel to work on the valve when maintenance is required. Because of space constraints, gate valves are considered too long, and butterfly valves can be installed, which take up almost no space.
3. No pressure gauge or device is installed
Some utilities like to calibrate testers, pressure gauges or devices, which usually provide their field personnel with a connection method to test the equipment. Although there is no regulation, such an installation can see the actual pressure of the valve.
4. The installation space is too small
Installing a valve station may involve work such as digging concrete. Don't try to minimize the installation space and save that little cost. It will be very difficult to perform basic maintenance later. Also remember that tools may be long, so space reservations must be set up so that bolts can be loosened.
5. Not considering post-disassembly
If all the parts are tightly tightened and there is no gap, it is almost impossible to separate them. Whether it is a groove coupling, a flange joint or a pipe joint, sometimes it may be necessary to remove the parts.
6. Concentric reducer horizontal installation
Eccentric reducers can be installed horizontally, while concentric reducers are installed in vertical lines. In some applications, it is necessary to install in a horizontal line, and an eccentric reducer is used, but this issue is usually related to cost: concentric reducers are cheaper.
7. Valve wells that do not allow drainage
Even during valve startup, when air is exhausted from the valve cover, water will fall to the floor at a certain point. If a drain cannot be installed, use a simple drain pump. In the absence of power, a float valve with an ejector will effectively keep the chamber dry.
8. Not excluding air
When the pressure drops, air is discharged from the suspension and is transferred into the pipeline, which will cause problems downstream of the valve. A simple bleed valve will get rid of any air that may be present and will prevent problems downstream. A bleed valve upstream of the control valve is also effective, because air in the pilot line can cause instability.
9. Spare taps
This setting provides convenience for future maintenance, whether it is connecting hoses, adding remote sensing to control valves or adding pressure transmitters for SCADA. For the small cost of adding accessories during the design phase, it significantly increases availability in the future.