DN450 Dula Plate Non Return Valve Btval

• Customization: Available
• Media: Water
• Temperature: Low Temperature
• Model NO.: HH48X HH49X
• Material: Cast Iron
• Connection Form: Flange
• Structure: Swing
• Pressure: Low Pressure
• Sealing Form: Rubber Sealing
• Flow Direction: Unidirection
• Standard: DIN
• Application: Industrial Usage, Water Industrial Usage, Household Usage
• Valve Name: DN450 Slow Colsing Check Valve
• Flanged Standard: DIN BS En Standard
• Size: DN450 on Site to Show
• Size Rang: 40-1400
• Pn10 Pn16: Available
• OEM Available: Yes
• Brand: Cast Logo Available
• Coating Kind: Wras Power
• Transport Package: Polywood Box Packing
• Specification: 880mm*770mm*440mm; 150kgs
• Trademark: BTVAL
• Origin: China
• HS Code: 8481804090
• Production Capacity: 50000 PCS
• Package Size: 88.00cm * 77.00cm * 44.00cm
• Package Gross Weight: 150.000kg

Product Description

high-performance check valve

Our high-performance valve ensures efficient backflow prevention with durable soft seals and compact design. ISO/CE-certified factory, 30+ years' expertise.

Specification

Applications

1.Municipal Sewage Networks: Prevents backflow in corrosive fluid pipelines; soft seals resist H2S abrasion.
2.Industrial Wastewater Systems: Handles chemical-laden flows;  SS316/Ductile Iron construction for durability.
3.Stormwater Management: Compact design adapts to fluctuating flows;     minimizes water hammer risks.
4.Treatment Plant Sludge Lines: Dual-plate structure avoids clogging from       solids/sediments.

Key Advantages:
1.Advanced CNC machining for precise leakage-proof performance;
2.Customized materials (WCB, SS316,Ductile iron etc.) & flange standards

    ( ANSI/DIN/JIS/BS);
3.30% faster delivery via automated production lines;

    24/7 multilingual tech support.
4.Trusted by global water treatment, HVAC, and chemical projects. Export-  ready packaging. Contact for competitive OEM pricing!

Key Configurations

Main body:

Ductile Iron (Nodular Cast Iron) Grades & Specifications

ASTM A536: 60-40-18 (60 ksi TS, 40 ksi YS, 18% Elongation)
EN 1563: EN-GJS-400-18, EN-GJS-500-7, EN-GJS-600-3
JIS G5502: FCD400, FCD450, FCD700 (high-strength variants)
GB/T 1348: QT400-18, QT500-7, QT600-3

Key Internal Components :

Dual Discs: DI with anti-corrosion coating rubber
Soft Seal Ring: NBR/EPDM/FKM for zero-leakage sealing
Stem/Shaft: SS316 with self-lubricating bushings
Hinge Pins & Bearings: Hardened alloy steel for wear resistance

right elevation

left elevation

front elevation

Technical Specifications

(Custom configurations available upon request.)

Model	DN450	Min DN40	Max DN1400
Operating Weight (kg)	122	5	1,400
Connection	BS EN DIN Flange	BS EN DIN Flange	BS EN DIN Flange
Working Pressure (Mpa)	0.1–1.6	0.1–1.6	0.1–1.6
Slow Closing Pipe System	Yes	No	Yes
Brand	OED	OEM	OEM
Coated Material	Potable Water Grade Epoxy Resin	Potable Water Grade Epoxy Resin	Potable Water Grade Epoxy Resin

Drawings & Dimensions

Detailed CAD drawings and dimensional diagrams are available for download here or upon inquiry. Our engineering team can provide tailored designs to meet specific project requirements.

After Sales Service

Standard Warranty: 

24/7 global technical support via email/chat.
5-year warranty on valve body & seals.
Emergency spare parts shipped within 48h.
Free maintenance guidance with video/docs.

Company Profile

BTVAL / Botou Valve Manufacturing Industrial Co.,Ltd 

BTVAL is a leading Chinese manufacturer of construction equipment with over 30 years of expertise. Certified with ISO 9001, CE, and GOST, we export to 50+ countries, offering reliable machinery backed by R&D innovation and strict quality control.more than 72+ world brand valve suppliers.

Why Choose Us?

Other Products

Supplying for 72+ world brands

OEM/ODM capabilities
Competitive pricing & bulk discounts
Fast shipping & customs clearance support
Turnkey project solutions

Direct Manufactuer

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Water level control valve

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FAQ

Q: What's the lead time for orders?
A:  Customized units require 25–45 days.

Q: Do you provide after-sales service overseas?
A: Yes, we have partnered service centers in key regions.

Q: Can I request a customized color and brand?
A: Absolutely! We offer this service.

Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).

Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.