Self-operated flow control valve is mainly used for constant flow control in pipeline systems. It automatically regulates by relying on the pressure change of the medium itself, without requiring an external power supply or air source. The valve is composed of a valve body and a self-operated actuator. After the flow value is set, it can automatically adjust the valve plug opening when operating conditions fluctuate, so that the system can still maintain relatively stable flow output. For non-corrosive liquid service, Self-operated flow control valve combines automatic regulation with a relatively simple structure, making it suitable for systems that require continuous operation while reducing the need for external control devices.
In closed-loop systems, the role of Self-operated flow control valve is more direct. Whether in hot water heating, air-conditioning circulation, refrigeration circuits, or general industrial liquid transfer, once flow distribution becomes uneven, the operating condition of downstream equipment tends to fluctuate. This self-operated constant flow control method can automatically maintain the preset flow when system differential pressure changes, helping achieve flow distribution and dynamic balancing in the pipeline network, reducing repeated commissioning, and making pumps and terminal equipment run more stably.
Specifications
Size: DN15~DN250
Pressure: PN1.6, PN4.0
End connection: RF,RTJ
Material: WCB, WC6, LCB, CF8, CF8M, CF3M, LCB,904L, 316Ti, A105, F304,F316, Duplex stainless steel, Monel, Hastelloy, (Special Materials on Request)
Applications
Self-operated flow control valve is widely used in closed water circulation systems, hot water heating systems, air-conditioning systems, refrigeration systems, and general industrial liquid pipeline networks. For applications that require branch flow control, stable system distribution, and reduced hydraulic imbalance, self-operated constant flow control can automatically correct the flow when system pressure fluctuates, making it suitable for continuous long-term operation.
In addition to HVAC and circulating water systems, Self-operated flow control valve can also be used in chemical processing, water treatment, food and beverage, and certain industrial liquid transfer applications. Whenever the system places more emphasis on constant flow, simplified control, and long-term stable operation, and does not require additional electric or pneumatic actuation, self-operated flow control is more likely to maintain a stable working condition.
Factory Strength
Founded in 2009, Huizheng owns a 50-mu standardized industrial plant and is an automatic control valve manufacturer integrating R&D, design, manufacturing, and sales. Its product range covers pneumatic control valves, electric control valves, self-operated control valves, ball valves, eccentric rotary valves, sliding gate valves, butterfly valves, gate valves, globe valves, and other series, and has long served projects in power generation, metallurgy, petroleum, chemical processing, pharmaceuticals, new energy, and water treatment.
In manufacturing and inspection, the factory is equipped with CNC machines, intelligent machining centers, robotic equipment, and testing devices for flaw detection, tensile testing, and spectrographic analysis, and has obtained ISO system certification, TS special equipment manufacturing license, CE, EAC, API, TUV, and other certifications. For products such as Self-operated flow control valve, which require both machining accuracy and operating-condition matching, a stable manufacturing base and complete inspection capability help ensure more consistent delivery quality.
Customization Capability
Self-operated flow control valve can be selected and customized according to preset flow range, connection standard, body material, medium condition, and installation requirements. For project-based demands, the valve can be calculated and matched according to technical parameters, and calculation sheets and drawing support can be provided after the operating conditions are confirmed, so that the product structure remains consistent with the actual site system.
The product supports drawing-based customization, customer design cooperation, and sample testing. For small-batch customized orders, tooling charges may be involved; for batch orders, the final solution and cost-sharing method can be further confirmed according to the project. The clearer the parameter confirmation is at the early stage, the smoother the later manufacturing, installation, and commissioning process will be.
Quality Control
Huizheng operates under a complete ISO9001 quality management system and applies standardized control throughout manufacturing, pressure testing, packing, and shipment. During order execution, pressure test videos, packing photos, packing lists, and customs declaration documents can be provided to confirm product condition, packing status, and shipping information, making the delivery process clearer and more traceable.
For after-sales handling, corresponding solutions can be provided according to the actual issue if any abnormal condition is found after delivery. Problems that can be handled remotely will be supported by video guidance, while parts that cannot be repaired on site can be resent according to the actual case. The after-sales team has technical background and can respond more efficiently to installation, commissioning, and operational issues, helping ensure more stable and smoother use later on.
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