Cast steel WCB lined with fluoropolymer rising stem OS&Y flange gate valve

What is Z41F46-16C fluoropolymer-lined rising stem gate valve?

Z41F46-16C is a rising stem OS&Y flange lined fluorine gate valve, which uses a handwheel to drive the valve stem and gate to lift and lower, achieving the opening and closing of pipelines. The open stem structure allows for a more intuitive observation of the valve's opening and closing status from the position of the valve stem, but space needs to be reserved for the valve stem to rise during installation.

Current product parameters

The current product specification is DN40-DN500, with a pressure rating of PN16/Class150. The valve body material can be selected from WCB or 304 (CF8), and the overcurrent area is lined with PFA or FEP. PN and Class belong to different standard systems, and actual orders should be confirmed separately based on flanges, materials, and pressure ratings.

What is the function of PFA and FEP lining?

PFA and FEP (F46) are fluoropolymers that can be used to isolate corrosive media from metal valve bodies. The processing methods and practical adaptability of the two materials are not completely the same, and the specific selection should be based on the composition, concentration, temperature, pressure, and lining structure of the medium.

'fluoropolymer-lined gate valve' cannot be understood as capable of withstanding all acids, alkalis, solvents, or any temperature.

What are the characteristics of the OS&Y pole structure?

The valve stem of OS&Y structures undergoes axial position changes with valve opening and closing, which is beneficial for on-site observation of the opening status. The open stem structure itself does not determine the sealing material, corrosion resistance level, or allowable pressure, and the specific performance still depends on the valve body, gate plate, valve seat, and lining structure.

Is fluoropolymer-lined gate valve suitable for long-term throttling?

Gate valves are usually more suitable for fully open or fully closed isolation. Long term throttling at a small opening may cause local high-speed medium erosion on the gate, valve seat, or lining. Therefore, if the process requires continuous fine adjustment, priority should be given to checking the dedicated regulating valve scheme.

What parameters are required for selection?

Suggest providing the name and concentration of the medium, temperature, and pressure DN、 Flange standards, valve body materials, lining requirements for PFA or FEP, opening and closing frequency, and the presence of special working conditions such as negative pressure, particles, or strong erosion.

Z41F46-16C fluoropolymer-lined Gate Valve Common Problems

Can the OS&Y structures directly determine the corrosion resistance of valves?

No. OS&Y describe the valve stem and transmission structure, and the corrosion resistance mainly depends on the lining and valve trim materials in contact with the medium.

Can PFA and FEP liners be directly interchanged?

It cannot be simply interchanged, and should be confirmed based on the medium, temperature, pressure, and actual lining structure.

Is Z41F46-16C suitable for long-term semi open flow regulation?

Gate valves are mainly used for opening and cutting off; If long-term continuous regulation is required, a suitable regulating valve structure should be selected based on flow characteristics, flushing, and control requirements.