DN250-PN16 Wafer Dual Plate Check Valve

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

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Technical Data Sheet: DN250-PN16 Wafer Dual Plate Check Valve

Item	Specificatie
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
Drukclassificatie	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	Unidirectioneel	Must match arrow marking on body

Materials of Construction

Onderdeel	Materiaal	Remarks / Alternative
Lichaam	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

_______

<-->| |<-- L (Face-to-Face Length)

| |_____| |

| |

| D (Body Diameter / Max. Width) |

| |

|____________|

(Flow ↑)

Applicable Standards

Design & Manufacture: EN 16767, API 594, BS 5153, JB/T 8937
Persoonlijk: 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:

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