Electric Lug Butterfly Valve D971F-16P

Product positioning

The electric lug butterfly valve D971F-16P is designed for water treatment, chemical engineering, public engineering, and automation pipelines. It adopts a lug type clamping valve body and a center soft seal butterfly plate structure, and is used for lug positioning, bidirectional cutting, and single-sided dismantling maintenance of water, air, and general corrosive process media. The combination of valves and electric switch type actuators can be connected to the on-site control system, allowing manual operation points to be converted into monitored and interlocked automatic control nodes. Fouten Flow Control (Jiangsu) Co., Ltd. determines materials and actuators based on the medium, pressure difference, operating frequency, and safe position, and does not use similar shapes to replace specific operating conditions for selection.

Action and sealing characteristics

D971F-16P is driven by an angular stroke electric actuator through a valve stem to rotate the butterfly plate, achieving opening and closing within the specified opening range, without using straight stroke or squeezing action. The valve adopts PTFE or enhanced PTFE sealing configuration, and the CF8/CF8M stainless steel valve body bears the corresponding pressure and connection load. The closing performance of valves is related to the sealing structure, working pressure difference, temperature, and medium conditions. The electric control system should verify the fully open and fully closed limit positions and valve position feedback. If the action is not in place, the continuous forced drive should be stopped, and the actuator and valve transmission status should be checked.

Selection Information

Before placing an order, it is necessary to confirm the actual diameter within the range of DN50-DN300, the design pressure of PN16, the working temperature from - 20℃ to 180℃, as well as the composition, concentration, viscosity, and solid content of the medium. Simultaneously explain the normal and maximum flow rates, pressure before and after the valve, number of actions, power supply of the electric actuator, control signals and power-off status, requirements for faulty switches, and on-site protection level. The material combination of the electric lug butterfly valve must be compatible with water, air, and generally corrosive process media; High frequency operation, long-term shutdown, crystallization medium or outdoor corrosive environment should increase corresponding safety factors and protective measures.

Product Specifications

Installation inspection

After arrival, first check the nameplate, model, interface, material, and accessories, and inspect for any bumps, looseness, or moisture during transportation. Before installation, remove welding slag, sand particles, and sealing debris from the pipeline, ensure that the interfaces at both ends are coaxial, and provide independent support for the pipeline and actuator. Do not use bolts to forcibly pull the positive and negative interfaces, nor allow cables or actuator attachments to bear the weight of the valve. Position according to the valve body identification and process flow direction, while reserving space for disassembly, manual operation, and replacement of seals.

Debugging steps

The first debugging should be carried out under the safe conditions allowed by the equipment, checking the opening and closing direction, mechanical limit, valve position indication and feedback contacts of the electric actuator, and completing the specified full stroke inspection. The power supply voltage, grounding, wiring, cable sealing, and overload protection should comply with the actual configuration requirements of the executing mechanism; Only check the phase sequence when the supporting equipment is applicable. Subsequently, the valve closure sealing, local and remote control, limit feedback, and interlocking action will be checked according to the project testing procedure, and then gradually put into normal operation according to the pipeline commissioning requirements.

operation and maintenance

Regularly check for external leaks, abnormal sounds, actuator temperature rise, loose connections, and changes in action time during operation. When it is found that the closure is not tight, first check the limit, pressure difference, debris, and seal wear; Check the power supply, control module, transmission resistance, and valve stem coaxiality when the action is slow. The replacement parts for maintenance must be consistent with the grade and size of the raw materials, and after completion, recalibrate the limit, feedback, and fault location. For media containing particles or prone to sedimentation, a flushing and periodic action plan should be developed to avoid a significant increase in starting torque after shutdown.

Safety Maintenance and Q&A

Before maintenance, close the upstream and downstream isolation points, drain the pressure and residual liquid, and isolate and lock the relevant power supply. Only after confirming that there is no pressure in the valve chamber and the surface temperature is safe can it be disassembled; Toxic, corrosive, or flammable media must also undergo displacement testing and personal protection requirements. The common selection question is whether the actuator can be selected only based on the diameter, and the answer is no. It also needs to be calculated based on the maximum pressure difference, sealing friction, and fault safety factor. Before putting into operation, sealing, action, feedback, and interlocking re inspection should be completed, and isolation can only be lifted after the records are qualified.

D971F-16P Electric Lug Butterfly Valve Common Problems

Can the 1. D971F-16P lug butterfly valve be repaired by removing one side of the pipeline?

It is not possible to directly perform unilateral tube disassembly based solely on the protruding ear connection. Whether to allow the dismantling of downstream pipelines requires confirmation of the single end pressure, lug connection structure, sealing direction, and pipeline isolation conditions corresponding to the configuration of D971F-16P. Even if the product has the corresponding single end usage capability, it is still necessary to implement the prescribed isolation, pressure relief, and maintenance safety measures before disassembly.

Can 2. electric butterfly valve be equipped with 220V power supply? Can you provide feedback on the switch in place?

The power supply and valve position feedback function of D971F-16P depend on the actual selected electric actuator. If AC220V power supply is provided on site, the actuator with rated power matching and output torque meeting the valve requirements should be selected; When remote monitoring of the fully open and fully closed states is required, the requirements for limit feedback devices, output interfaces, and control cabinet wiring should also be clearly defined. A certain voltage or feedback function cannot be used as the default parameter for all configurations.

Will the 3. D971F-16P electric butterfly valve automatically close after a power outage?

Ordinary electric switch type actuators cannot automatically shut down during power outages by default. The actual power loss state is related to the transmission mode of the actuator and whether energy storage or safety reset devices are configured. If the process requires power-off shutdown, the safety action position, actuator configuration, and corresponding control requirements should be clearly defined during the selection stage.