Valve Encyclopedia
Fouten Flow Control (Jiangsu) Co., Ltd. Valve Encyclopedia, focusing on pneumatic valves, electric valves, regulating valves, and lined valves, interprets common customer issues such as pressure rating, sealing, drive, and materials, and provides selection, procurement, and acceptance references based on corresponding product information.
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Why do fluoropolymer-lined discharge ball valves have large and small ports? How to balance the bottom interface, discharge and residue2026-10-15Fouten Flow Control (Jiangsu) Co., Ltd. combined with fluoropolymer-lined discharge ball valve selection, the large and small openings of the discharge ball valve usually serve the different connection requirements between the equipment end and the discharge pipe end. Procurement should not only report the larger DN, b...View more > -
Angle type regulating valve or straight through regulating valve? Select both pipeline steering and throttle position together2026-10-15Fouten Flow Control (Jiangsu) Co., Ltd. combined with pneumatic angle control valve selection, angle control valve not only eliminates the elbow next to the straight through valve. It turns the flow path inside the valve body, changing the equipment interface, outlet direction, throttled flow, and maintenance space tog...View more > -
How to choose pneumatic welded ball valve and flange ball valve? In addition to connecting, it is also necessary to compare maintenance plans2026-10-15Fouten Flow Control (Jiangsu) Co., Ltd. combined with pneumatic welded ball valve selection, the difference between welded ball valve and flange ball valve is not only in whether there are bolts at the connection. The former welds the valve end and pipeline as the connection boundary, while the latter is connected thro...View more > -
What is the price difference for regulating valves? How to compare the valve body, internal components, actuator and acceptance scope2026-10-15Fouten Flow Control (Jiangsu) Co., Ltd. combined with pneumatic single seat regulating valve selection, there is a significant difference in the quotation between the two regulating valves. Don't just compare the model and diameter for now. The valve body may be the same, but the internal capacity, contact material, ac...View more > -
How to choose between electric O ball valve and V ball valve? The difference between cutting off and continuous adjustment2026-10-15Fouten Flow Control (Jiangsu) Co., Ltd. combined with electric flange ball valve selection, if the task is to reliably switch pipelines, first compare the cutting performance; If it is necessary to continuously change the flow rate with the signal, it is necessary to compare the throttling channel and the adjustment ca...View more > -
Do we still need to verify the on-site system pressure test if the valve passes the factory test?2026-10-14Fouten Flow Control (Jiangsu) Co., Ltd. interpretation valve factory test on-site pressure test, still needs to be verified. Under the specified conditions for factory testing and evaluation of finished products, on-site system testing also includes pipe fittings, installation, segmentation boundaries, and different eq...View more > -
How to write the leakage rate of vacuum valves for acceptance? Units, test gases, and boundaries2026-10-14Fouten Flow Control (Jiangsu) Co., Ltd. interprets the unit of vacuum valve leakage rate, cannot. Leakage rate, pressure, and pumping capacity correspond to different quantities, and the detection of gas and testing boundaries also affect the meaning of the report. Purchase verification, complete set acceptance, and us...View more > -
Can the fluoropolymer-lined flange bolts still use their original torque after lubrication? Tightening condition verification2026-10-14Fouten Flow Control (Jiangsu) Co., Ltd. Interpretation: fluoropolymer-lined flange bolt lubrication cannot be directly used. Torque is not a direct measurement of bolt preload force, and friction between threads and pressure bearing surfaces can affect the relationship between the two. Purchase verification, complete s...View more > -
Butterfly valves are marked with bidirectional sealing, can the reverse pressure difference also be used at full rated value?2026-10-14Fouten Flow Control (Jiangsu) Co., Ltd. interprets the bi-directional sealing pressure difference of butterfly valves, which needs to be confirmed separately. The performance of allowing reverse flow, reverse pressure, and reverse shut-off are not exactly the same. Purchase verification, complete set acceptance, and us...View more > -
What should be considered when connecting pneumatic valve exhaust to a shared pipeline? Back pressure and motion interference2026-10-14Fouten Flow Control (Jiangsu) Co., Ltd. Interpretation: Pneumatic valves share exhaust, special solutions can be discussed, but it cannot be assumed that the attachment allows for arbitrary exhaust back pressure. The resistance of shared pipelines, simultaneous action, and exhaust of other equipment may alter the condi...View more >
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