Technical Data Sheet: DN250-PN16 Wafer Dual Plate Check Valve
Item | Spécification |
Product Name | Wafer Dual Plate Check Valve / Wafer Double Door Check Valve |
Type/Series | General Purpose (e.g., Series equivalent to Pegler V909, Oventrop, Honeywell Impact) |
Nominal Diameter | DN250 (10 inches) |
Nominal Pressure | PN16 |
End Connection | Wafer Type Design, designed for installation between PN16 flanges (According to EN 1092-2, ISO 7005-2, or ASME B16.5 Class 150) |
Design Structure | Dual Plate / Double Door with Spring-Loaded Hinge |
Technical Parameters
Paramètre | Value | Remarques |
Pression nominale | PN 16 / 16 bar | Maximum allowable working pressure |
Shell Test Pressure | 24 bar | Hydrostatic test |
Seat Test Pressure | 17.6 bar | Hydrostatic test |
Suitable Media | Water, Non-corrosive liquids, HVAC water, Potable water | Not suitable for heavily polluted media or strong acids/bases unless specified |
Medium Temp. Range | -10°C to +110°C (Standard) | Dependent on seat material |
| -29°C to +180°C (Special Seals) | |
Flow Coefficient (Kv) | Approx. 2000 – 2330 m³/h | Flow rate at ΔP = 1 bar, fully open |
Installation Position | Horizontal or Vertical | For horizontal lines, hinge pin must be horizontal/vertical; For vertical lines, flow must be upwards |
Flow Direction | Unidirectionnel | Must match arrow marking on body |
Materials of Construction
Composant | Matériel | Remarks / Alternative |
Corps | Ductile Iron / Cast Iron | e.g., EN-GJS-450-10 (GGG40), EN-GJL-250 |
Discs / Plates | Stainless Steel / Coated Ductile Iron | Common: SS304, SS316; or Epoxy-coated Ductile Iron |
Shaft / Pin | Stainless Steel | e.g., SS420, SS316 |
Springs | Stainless Steel | |
Seat / Seal | EPDM (Ethylene Propylene Diene Monomer) | Standard Option: Suitable for water, wastewater, mild chemicals |
| NBR (Nitrile Butadiene Rubber) | Suitable for oils and fuels |
| PTFE (Polytetrafluoroethylene) | High temperature or corrosive media |
Coating | Epoxy / Anti-corrosion Paint | Standard color: Blue (RAL 5005) or as specified |
Face-to-Face & Installation Dimensions (mm)
The face-to-face dimension (L) is critical for correct installation between flanges.
Dimension | Value | Standard / Reference |
Face-to-Face Length (L) | 108 mm | According to EN 558-1 Series 49 (formerly DIN 3202 K3) |
| 114 mm | Alternative dimension depending on manufacturer design |
Body Diameter (D) | ~328 mm | Maximum outer diameter to fit between PN16 DN250 flanges |
Reference: Flange Bolt Circle Dia. (K) | 355 mm | Corresponds to EN 1092-2 PN16 DN250 flange |
Reference: Flange Bolt Holes | 12 – Ø26 mm | Corresponds to EN 1092-2 PN16 DN250 flange |
Approx. Weight | ~19.5 kg | Range varies by manufacturer (approx. 13.8kg – 30kg) |
Dimensional Sketch (Reference Only):
text
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<-->| |<-- L (Face-to-Face Length)
| |_____| |
| |
| D (Body Diameter / Max. Width) |
| |
|____________|
(Flow ↑)
Applicable Standards
- Design & Manufacture: EN 16767, API 594, BS 5153, JB/T 8937
- Face à face : EN 558-1 (Series 49), ISO 5752, DIN 3202 K3
- Flange Connection: EN 1092-2, ISO 7005-2, ASME B16.5 Class 150 (compatible)
- Inspection & Testing: EN 12266, API 598, ISO 5208
Key Features & Applications
Key Features:
- Compact & Lightweight: The wafer design saves space and reduces weight compared to swing check valves.
- Quick Closing / Non-Slam: Short spring-assisted disc travel minimizes the risk of water hammer and prevents reverse flow effectively.
- Low Pressure Drop: Streamlined body and disc design offer low resistance to flow.
- Versatile Installation: Can be installed in both horizontal and vertical pipelines.
Main Applications:
- Water Supply and Distribution
- HVAC Systems (Heating, Ventilation, and Air Conditioning)
- Industrial Cooling Water Circuits
- Pump Protection (Preventing backflow damage)
Notes:
- This datasheet is based on general industry specifications. For final installation, please refer to the official datasheet of the specific manufacturer (e.g., Flowserve, Bray, Emerson, KSB).
- When ordering, please specify the required seat material (EPDM, NBR, PTFE, etc.) based on your media temperature and chemical compatibility.
GARANTIE :
SAVVY VALVES s'engage à fournir des produits d'une qualité exceptionnelle et un service après-vente sans souci. Nos vannes sont garanties pour une durée de vie minimale de 12 mois, période durant laquelle nous fournissons gratuitement toutes les pièces de rechange nécessaires et des instructions d'entretien détaillées. Pendant la période de garantie, en cas de dommage non causé par l'homme, nous remplaçons gratuitement les composants et fournissons une assistance technique professionnelle. Après l'expiration de la garantie, seuls les pièces de rechange sont à votre charge, tout en bénéficiant de services de maintenance à prix réduits. Notre objectif est d'aider nos clients à réduire leurs coûts d'exploitation et à optimiser leur production grâce à une qualité fiable et un service après-vente complet. Qu'il s'agisse de questions techniques ou de besoins de maintenance, notre équipe d'experts répondra rapidement pour garantir le fonctionnement optimal de votre système de vannes.