Pneumatic flange ball valve Q641F-16C

Q641F-16C Pneumatic Flange Ball Valve

Structure and Drive

Q641F-16C adopts a two-piece straight channel, flange connection, and floating ball structure. During operation, the opening and closing components are driven by a double acting or single acting pneumatic actuator to change the flow area and achieve corresponding cutting or adjustment. When it comes to remote control, interlocking, or feedback, the requirements for gas source pressure, control signals, and accessories such as solenoid valves or positioners should be clearly defined during the ordering stage to avoid on-site configuration mismatch.

Material and sealing

The commonly used caliber is DN15-DN200, and the pressure rating is PN16/PN25. The valve body material is WCB/CF8/CF8M, and the seal adopts PTFE or reinforced PTFE soft seal. The selection of materials must take into account the corrosiveness of the medium, chloride ions, temperature fluctuations, particulate matter, and cleaning conditions; The allowable pressure difference, leakage level, and temperature range need to be checked synchronously. Under conditions of high temperature, easy crystallization, particle content, or frequent operation, the hardness of valve internals, packing structure, and erosion prevention measures should also be confirmed.

Product Specifications

Applicable working conditions

Common features include quick cut-off, optional gas loss position, flange connection, which can be used for chemical pipelines, water treatment, and equipment interlocking. When used in explosion-proof areas, actuators, limit switches, solenoid valves, or locators should be configured according to the site zoning. When used in food, pharmaceutical, or high-purity media systems, further confirmation of the contact material, surface treatment, and cleaning plan is required; Projects involving flammable, toxic, or highly corrosive media should undergo specialized safety reviews.

Installation and Debugging

Before installation, check the nameplate, flow direction, and connection standards, remove welding slag and hard debris, and avoid transmitting pipeline stress to the valve body. Maintenance space should be reserved around the actuator; If solenoid valves, limit switches, or locators are configured, their electrical interfaces should be protected according to the on-site environment; Pneumatic accessories should use a clean and dry air source that meets the requirements of the actuator. The first debugging can be carried out by checking the switch position, travel feedback, interlocking logic, and sealing of connection parts in a low-risk state, and then gradually putting them into normal operation.

Operation and maintenance

During operation, action time, valve position feedback, abnormal noise, leakage, and control signals should be recorded. When there is a delay or inability to reach the desired position, the air source, filtering and pressure reducing device, solenoid valve or positioner (if configured), limit feedback and pneumatic actuator should be checked first, and then the valve stem, valve seat and seals should be checked. Blindly increasing the driving force is not advisable. Before maintenance, it is necessary to isolate the medium, relieve pressure, and confirm that there is no residual energy; After replacing spare parts, sealing and action tests should be conducted.

Q&A on selection of pneumatic flange ball valve

Selection and ordering information

Suggest providing the name and composition of the medium, design and operating temperature, maximum and normal pressure, flow range, pipeline standards, operating frequency, gas source pressure, control signals, as well as requirements for accessories such as solenoid valves or positioners, fault safety locations, and environmental protection requirements. Fouten Flow Control (Jiangsu) Co., Ltd. can be used to verify the caliber, material, seal, actuator, and accessory combination, retaining technical basis for installation and maintenance.