It differs somewhat in construction from the lift pump, in that it has no valve in the piston and is provided with a check valve and an air chamber for generating pressure to the discharged water.
A standpipe is arranged as shown in the figure, with a check valve to prevent the water in the ram from being forced back into the spring water pipe after entering the ram.
The pipe from the bilge in this case leads to the suction side of the circulating pump, and requires a strainer at the bilge end, a cock at the circulating pump, and a check valve.
A check valve is merely a second delivery valve placed close to the boiler and serving to enable the pump to be taken apart if occasion should arise, without letting the water out of the boiler.
Be sure the exhaust nozzle does not get limed up, and be sure the pipe where the water enters the boiler from the heater is not limed up, or you may split a heater pipe or knock out a check valve.
What is a check valve, and what is its use, and where located?
A check valve, whether it is vertical or horizontal, will allow water to pass through it one way only, if it is in good working order.
Don't let the exhaust nozzle lime up, and don't allow lime to collect where the water enters the boiler, or you may split a heater pipe or knock the top off of a check valve.
When a meter is used on a water system, the water company demands that a check valve be placed on the hot-water system to prevent the hot water from being forced back into the meter in case the pressure got strong enough in the boiler.
If a check valve is used for this purpose, or for any other purpose, a safety valve must be placed on the boiler piping system to relieve any excessive pressure that may be caused by having the check valve in use.
There is today, with meters of modern type, no reason to use a check valve or a safety valve.
When a check valve is placed on the piping, this means of escape is shut off and a safety valve must be employed.
Some steam-heating systems have a check valve in the pipe which returns water to the boiler.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "check valve" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
