J Line Pump
Horizontal Double Suction Centrifugal Pump – API 610 Process Pump
46 V1.032818
2. As soon as the ejector waste pipe throws water continuously, the pump may be started. After
starting, a steady stream of water from the waste pipe indicates the pump is primed. If this
stream of water is not obtained, the pump must be stopped at once and the process of
priming repeated. A foot valve is unnecessary when this kind of device is used.
3. Open the discharge valve slowly and close off the ejector.
7.1.3 Priming by foot valve
When it is not practical to prime by ejector or exhauster, the pump may be primed by the use of a foot
valve. The foot valve will prevent liquid running out through the suction inlet and the pump can be
completely filled with liquid from some outside source. Pet cocks on the top of the pump should be
opened during filling to allow the air to escape. A tight foot valve will keep the pump constantly primed
so that the pump may be used for automatic operation. However, the valve must be inspected
frequently to make sure it does not develop leaks and thus the pump could be started dry.
7.1.4 Priming by Vacuum pump
When none of the above methods of priming is practical, the pump may be primed by the use of the
vacuum pump to exhaust the air from the pump casing and suction line. A wet vacuum pump is
preferable, as it will not be damaged if water enters it. When a dry vacuum pump is used, the
installation must be such as to prevent liquid being taken into the air pump. The vacuum pump
manufacturer's instructions should be followed.
7.2 STARTUP
Every time before the pump is started up the safety devices must be mounted and
fastened.
In order to avoid risks of injury or damage, all pump units must be equipped with
emergency-stop devices.
For operation of electrical drives, control systems and their cable routes, the
safety instructions issued by their manufacturers must be observed.
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