{"id":2243,"date":"2023-11-08T03:52:20","date_gmt":"2023-11-08T03:52:20","guid":{"rendered":"https:\/\/sumiowater.com\/en\/?page_id=2243"},"modified":"2025-07-11T07:31:12","modified_gmt":"2025-07-11T12:31:12","slug":"back-pressure-valve-chemfeed","status":"publish","type":"page","link":"https:\/\/sumiowater.com\/en\/chemical-dosing-packages\/back-pressure-valve-chemfeed\/","title":{"rendered":"Back Pressure Valve"},"content":{"rendered":"\n

Back pressure valves are a necessary element in a chemical injection system<\/strong>. This valve is placed in the discharge line, after the dosing pump and before the pulsation damper.<\/p>\n\n\n\n

Why a chemical injection package needs a back pressure valve?<\/strong><\/h3>\n\n\n\n

Its function is to maintain a constant pressure (back pressure), which is useful mainly when the pump starts with an empty line or when dosing into a low-pressure tank.<\/p>\n\n\n\n

It works similarly to a relief valve, opening at a determined back pressure. But in this case, the liquid is relieved into the injection line instead of the storage tank.<\/p>\n\n\n\n

It is usually very similar and only differs in the back pressure, which one only has two connections, an inlet and an outlet, instead of three.<\/p>\n\n\n\n

Back pressure valves allow metering pumps to operate with greater precision and constant pulses; also, they can prime under start-up conditions or due to gas release events from the chemical itself.<\/p>\n\n\n\n

The opening levels of a backpressure valve must be damped to avoid backpressure instabilities and to avoid valve noise.<\/p>\n\n\n\n

In addition to allowing the pump to prime and stabilize the dosage, this valves act as anti-siphon protection.<\/p>\n\n\n\n

Do you want more information?<\/h4>\n\n\n\n


Click here
<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Back pressure valves are a necessary element in a chemical injection system. This valve is placed in the discharge line, after the dosing pump and before the pulsation damper. Why a chemical injection package needs a back pressure valve? 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