Structure & Design
- Jacketed Design: The valve body features a welded jacket layer around the flow channel, allowing circulation of heating media (steam/thermal oil) or cooling media to maintain optimal fluid temperature and prevent crystallization or solidification. Jacket connections are typically 1/2" internal threads but can be customized to flanged ends.
- Plunger-Type Mechanism: Utilizes a plunger structure with soft sealing for leak-free operation and smooth opening/closing. The plunger rod length is customizable (standard: 30-180mm) to suit varied installation requirements.
- Dual Sealing System: Select models (e.g., BZ413H) adopt a dual-seal plunger design, where the conical tip of the valve stem engages with the valve seat's tapered bore. Sampling is achieved by rotating the handwheel to lift the stem, allowing media flow into sampling containers.
Technical Specifications
- Material: 304/316L stainless steel (corrosion-resistant), with optional special alloys.
-Specifications:
- Bore Size: DN15-DN100 (standard), DN32-DN250 (customizable).
- Pressure Rating: PN16-PN63 (common PN16-25; custom up to PN40-63).
- Temperature Range: Standard <200°C, customizable up to 450°C.
- Connection Types: Flanged (primary), threaded, or welded ends for pipeline compatibility.
### **3. Applications**
- **Media Types**: Ideal for viscous fluids (e.g., resins, asphalt), crystallizing substances, or temperature-sensitive materials (e.g., high-temperature melts in chemical reactors).
- **Industries**: Chemical processing, pharmaceuticals, food production, thermal power plants, oil refining, paper mills, and other industries requiring frequent sampling and analysis.
Operation & Maintenance
- Actuation: Manual (handwheel or lever-driven), with optional pneumatic or electric actuators.
- Operation Steps:
1. Verify operating conditions (pressure, temperature, media properties) before installation.
2. Preheat/cool the jacket to the target temperature before sampling to avoid blockages or damage.
3. Rotate the handwheel counterclockwise to release media; close clockwise after sampling.
-Maintenance: Regularly adjust packing screws to ensure sealing integrity and remove debris from inlets/outlets.
Key Advantages
- Anti-Clogging: Adjustable plunger length and jacket insulation ensure smooth flow of high-viscosity media.
- Versatility: Compatible with multiple connection types and actuation methods for complex industrial needs.
-Safety & Reliability: Narrow jacket-body gap (3mm) enhances temperature control; static seals prevent plunger residue buildup and leaks.
Model Examples
- NKRBWZSQYF-2516RL: Jacketed plunger sampling valve, DN15-100, PN16-63, 18-month warranty.
- BZ413H: Designed for asphalt, flanged/welded type, 16MPa pressure rating, 80°C operating temperature.
Precautions
- Safe Operation: Do not force the valve open if media is solidified or jacket temperature is insufficient, to avoid stem detachment or leakage.
- Customization: Non-standard sizes, materials, and pressure ratings are available, with lead times of ~25-30 days.
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