DN25-PN25 Close Die Forged Plunger Valves

TECHNICAL DATA SHEET

Product Name: DN25 PN25 Close Die Forged Plunger Valve
Model/Specification: DN25-PN25-PLUNGER
Kleptype: Plunger Valve (Piston-Type Stop Valve)
Connection Type: Flanged (RF) / Threaded (NPT) / Socket Weld / Butt Weld User specified

1. Basic Design Parameters

2. Technical Specifications

3. Material of Construction (Recommended – Carbon Steel)

*For Stainless Steel version (A182 F304/F316), bolting changes to B8/8, body/bonnet to SS.*

4. Main Dimensions & Connection Details

*Note: Dimensions for Flanged Ends (RF) according to EN 1092-1 and EN 558-1. Other end connections vary.*

4.1 End-to-End Dimensions (Face-to-Face)

4.2 Flange Details (Per EN 1092-1 – Type 11 / PN25)

4.3 End Preparation (Alternative Connections)

5. Pressure-Temperature Rating

*Material Group: Carbon Steel (A105) or Stainless Steel (F304/F316) – Sealing rings limit temperature.*

Note: With PTFE rings, max temperature 200°C. With graphite rings, max 450°C (but PN rating derated at higher temps).

6. Test Pressure (EN 12266-1 / API 598)

7. Features & Applications

• Key Features:
• Zero Leakage Design: Elastic sealing rings compressed by the polished plunger ensure bubble-tight shut-off, exceeding metal-seated valve performance .
• Close Die Forged Body: Provides superior strength, uniform grain flow, and absence of porosity – ideal for demanding service .
• Self-Adjusting Seals: The sealing rings compensate for wear and thermal variations, maintaining a tight seal over extended life .
• Easy Maintenance: Sealing rings can be replaced without removing the valve body from the pipeline (with top-entry bonnet) .
• Excellent Throttling Capability: The plunger design allows for smooth flow control with minimal erosion .
• Double Seal Protection: Two independent sealing rings provide redundancy .
• Corrosion & Wear Resistance: Hardened stainless steel plunger resists scratching and corrosion .
• Backseat Design: Protects stem packing when valve fully open .
• OS&Y Design: Visual indication of valve position .
• Main Applications:
• Steam Systems: Steam distribution, boiler blowdown, tracer lines .
• Thermal Oil / Heat Transfer Fluids: High-temperature liquid services .
• Chemical Processing: Handling corrosive fluids with PTFE sealing rings .
• Water & Wastewater: Isolation and control where zero leakage is required .
• Oil & Gas: Light hydrocarbon services .
• General Industrial Piping: Reliable shut-off for gases and liquids .

Disclaimer: The above data is prepared based on common industry standards (DIN/EN) for forged plunger valves. Specific dimensions, materials, and pressure ratings may vary by manufacturer. The final technical agreement and certified drawings shall prevail.

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