Technical Data Sheet: DN250-PN16 Wafer Dual Plate Check Valve
Item | Specification |
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
Parameter | Value | Remarks |
Pressure Rating | 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 | Unidirectional | Must match arrow marking on body |
Materials of Construction
Component | Material | Remarks / Alternative |
Body | 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)
| |_____| |
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| D (Body Diameter / Max. Width) |
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|____________|
(Flow ↑)
Applicable Standards
Key Features & Applications
Key Features:
Main Applications:
Notes:
GUATANTEE:
SAVVY VALVES is committed to delivering exceptional product quality and worry-free after-sales service. Our valves are guaranteed to provide a minimum service life of 12 months, during which we will supply all necessary spare parts and detailed maintenance instructions free of charge. Within the warranty period, if any non-human-induced damage occurs, we will replace components at no cost and provide professional technical support. After the warranty expires, customers only need to pay for the cost of spare parts, while still benefiting from discounted maintenance services. Our goal is to help clients reduce operational costs and enhance production efficiency through reliable quality and comprehensive after-sales support. Whether for technical inquiries or maintenance needs, our expert team will respond promptly to ensure your valve system maintains optimal performance at all times.
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