Flange Plunger Valves

Flange Plunger Valves

Working Principle:

The valve is driven by a handwheel or actuator, which moves the valve stem to vertically lift or lower the plunger. When the plunger descends to its lowest position, its finely ground outer surface tightly adheres to the high-elasticity sealing ring embedded in the valve body, forming an annular contact seal that effectively blocks the flow of the medium. During opening, the plunger rises and disengages from the sealing ring, allowing the medium to flow through. The sealing force is not entirely dependent on the medium pressure but is achieved through the axial compression force of the valve stem, making it a forced seal. Consequently, the sealing performance remains unaffected by pressure fluctuations.

Core Features:

1. Reliable Dual Composite Seal: The design incorporates a structure combining "precision-ground plug + high-performance elastic sealing ring," forming a radial seal to achieve zero leakage.

2. Smooth Operation, Long Service Life: Minimal friction during opening and closing ensures low torque and rapid switching. The sealing ring features automatic wear compensation and is easy to replace, resulting in an extended service life.

3. Wide Medium Compatibility: Sealing rings can be made from reinforced PTFE, polyphenylene, metal, and other materials, offering resistance to high temperatures, corrosion, and wear. Suitable for water, steam, oil products, acids, alkalis, and various solvents.

4. Easy Maintenance: Supports online maintenance and rapid replacement of sealing components, eliminating the need for complete valve disassembly and saving both maintenance costs and time.

5. Low Flow Resistance Design: The fully open flow path is nearly identical to the pipe diameter, minimizing pressure drop and ensuring smooth fluid passage.

Application Areas:

Petrochemical Industry: Oil refining facilities, chemical plant process pipelines, oil and gas transmission.

Power Industry: Power plant boiler systems, water supply and drainage, steam pipelines.

Heating Systems: Urban centralized heating networks, heat exchange stations.

Industrial Processes: Fluid control in papermaking, pharmaceuticals, food and beverage, and textile printing and dyeing.

General Industry: Compressed air systems, boiler rooms, water treatment plants.

Main Technical Parameters:

Specifications & Connections: Nominal diameter DN15–DN300 (½”–12”); Flange connections (compliant with multiple international standards).

Pressure & Temperature: Nominal pressure PN1.6–PN16.0MPa (Class150–900); Applicable temperature -29℃ to +425℃ (depending on sealing ring material).

Key Materials: Body: Carbon steel/Stainless steel/Alloy steel, etc.; Plunger: Stainless steel; Sealing ring: Reinforced PTFE/Polyphenylene/Metal, etc.

Actuation & Media: Compatible with manual, worm gear, electric, and pneumatic actuation; Suitable for water, steam, oil, acids, alkalis, and various other media.

Key Selection Considerations:

Determine the valve body and sealing ring materials based on medium characteristics, temperature, and pressure.

Select the flange specifications according to pipeline size and connection standards.

Choose the actuation method based on operational frequency and automation requirements.

Installation Recommendations:

Clean the pipeline before installation to prevent welding slag and impurities from damaging the sealing surface.

The valve must be installed vertically, with the valve stem in an upright position, to ensure smooth plunger movement and effective sealing.

Pay attention to the medium flow direction during installation, typically following the "low inlet, high outlet" principle (depending on specific design).

Reserve sufficient space for operation and maintenance.

Key external features and connection dimensions:

Packaging & Delivery

Minimum Order Quantity: 1 unit

Delivery Lead Time: 15-25 days

Payment Terms: Prefer T/T (Telegraphic Transfer) with full payment in advance

Packing Material: Export-standard wooden case