1. The bolts are too long

Bolts on valves with only one or two threads over the nut will do.Reduce the risk of damage or corrosion.Why buy a bolt longer than you need?Often, the bolt is too long because someone doesn't have time to calculate the correct length, or the individual doesn't care what the end result looks like.This is lazy engineering.

2. The control valve is not isolated

Although the isolation valve takes up valuable space, it is important to allow personnel to work on the valve when maintenance is required.If space is limited, if the gate valve is deemed too long, at least install the butterfly valve, which takes up almost no space.Always keep in mind that they are easier to work with and more efficient to perform maintenance tasks for those who must stand on them for maintenance and operation.

3. No pressure gauge or device is installed

Some utilities like calibration testers, and these facilities often do a good job of providing their field personnel with access to the testing equipment, but some devices even mount the connector to the accessories.Although not specified, it is designed so that the actual pressure of the valve can be seen.Even with supervisory control and data acquisition (SCADA) and telemetry capabilities, someone at some point will be standing next to the valve and needs to see what the pressure is, that's so convenient.

4. The installation space is too small

If it is a hassle to install a valve station, which may involve digging concrete, do not try to save that amount of cost by making it as small as possible.Basic maintenance at a later stage will be very difficult.Also keep in mind that tools can be very long, so you have to set up room to allow for the bolts to be loosened.You also need some space, which allows you to add devices later.

5. Disassembly at later stage is not considered

Most of the time, installers understand that you can't connect everything together in a concrete chamber without some type of connection to remove the components at some point in the future.If all the parts are screwed tight and there is no gap, pulling them apart is nearly impossible.Whether it is groove coupling, flange joint or pipe joint, it is necessary.In the future, it may sometimes be necessary to remove parts, and while this is not usually a concern of the installation contractor, it should be a concern of the owner and engineer.

6. Horizontal installation of concentric reducers

This may be nitpicking, but it's also worth paying attention to.Eccentric reducers can be installed horizontally.The concentric reducer is mounted in a vertical line.In some applications where installation at horizontal lines is required, eccentric reducers are used, but this problem is usually associated with cost: concentric reducers are cheaper.

7. Valve Wells that do not allow drainage

All the rooms are wet.Even during valve operation, water will fall to the floor at some point as air is expelled from the bonnet.Anyone in the industry at any time has seen a flooded valve, but there's really no excuse (unless, of course, the entire area is flooded, in which case you have bigger problems).If a drain pipe cannot be installed, use a simple drain pump, assuming a power supply is available.In the absence of power, a float valve with an injector will effectively keep the chamber dry.

8. Do not exclude air

As the pressure drops, air is removed from the suspension and diverted into the pipeline, which can cause problems downstream of the valve.A simple vent valve will get rid of any air that may be present and will prevent downstream problems.A bleed valve upstream of the control valve is also effective, as guiding air in the line can cause instability.Why not remove the air before it reaches the valve?

9. Spare tap

This may be a minor problem, but it is always helpful to have a spare tap in the chamber upstream and downstream of the control valve.This setting provides convenience for future maintenance, whether connecting hoses, adding remote sensing to control valves or adding pressure transmitters to SCADA.For the small cost of adding accessories at design time, it significantly increases availability in the future.Makes the maintenance task even more difficult because everything is covered with paint, so it's impossible to read the nameplate or make adjustments.