Pneumatic single seat regulating valve ZJHP-16C

ZJHP-16C Pneumatic Single Seat Regulating Valve

Structure and Drive

ZJHP-16C adopts straight through single seat, valve stem lifting and flange connection. The multi-spring pneumatic diaphragm actuator converts air pressure into linear thrust of the valve stem, driving the valve core to change the flow area for continuous adjustment, and can undertake the cutting task when the valve internals and allowable leakage conditions meet the requirements. When remote control or valve position tracking is required, it is necessary to confirm the instrument air supply, valve positioner or electropneumatic interface, control input and position feedback. Confirm air-to-open or air-to-close action separately from the required fail-safe position on loss of instrument air.

Material and sealing

The specific model on this page is ZJHP-16C, the nominal pressure is PN16, and the valve body material is WCB carbon steel. The specific configuration of metal seal or soft seal should be determined according to the medium, temperature, pressure difference, and leakage requirements. If the project requires stainless steel valve bodies or other pressure ratings, the corresponding model and material code should be confirmed, and ZJHP-16C cannot be directly used as the same specific model. High temperature, easy crystallization, particle content, or frequent operating conditions require further confirmation of valve internals, packing, and erosion conditions.

Product Specifications

Applicable working conditions

Common features include continuous regulation, configurable air-to-open or air-to-close action, and stable control, which can be used in chemical processes, energy systems, and continuous flow control. When used in explosion-proof areas, actuators, limit switches, solenoid valves, or positioners 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, the nameplate, specified flow direction, and flange connection conditions should be checked, welding slag and hard debris inside the pipe should be removed, and pipeline stress should be avoided from being transmitted to the valve body. Maintenance space should be reserved around the pneumatic actuator, and the instrument air source should meet the quality and pressure requirements of the supporting actuator and accessories. The first debugging should check the air-to-open or air-to-close action, valve stem stroke, positioner or valve position feedback, fail-safe position on loss of instrument air, and interlocking logic, and then check the sealing of the connection parts according to regulations and gradually put them into operation.

Operation and maintenance

During operation, attention should be paid to the instrument air supply, valve position feedback, abnormal noise, external leakage, and control signals. When there is a delay or inability to move properly, the instrument air source, filter pressure reducing device, positioner or electrical conversion accessories, actuator and control circuit should be checked first, and then the valve stem, valve core, valve seat and sealing components should be checked. Blindly increasing the air source pressure should not be used to compensate for mechanical failures. Before maintenance, it is necessary to isolate the medium, relieve pressure, and confirm that residual energy such as the instrument air supply has been safely isolated and released; After replacing the components, sealing and action checks should be carried out.

Q&A on the selection of pneumatic single seat regulating valve

Selection and ordering information

Suggest providing the medium and composition, design and operating temperature, pressure before and after the valve, normal/maximum/minimum flow rate, pipeline standards, operating frequency, control signals, instrument air supply conditions, air-to-open or air-to-close action, and the required fail-safe position on loss of instrument air, and on-site environmental conditions. Fouten Flow Control (Jiangsu) Co., Ltd. can use this information to check the valve diameter, valve internals, pneumatic actuator, and control accessory configuration.

Selection references: Check Cv, Kv and flow characteristics, Single-seated vs cage-guided control valves, Pneumatic vs electric control valves. Confirm capacity, trim and actuation separately for the ordered assembly.