Valves & Parts

Ductile Iron Rubber Lined Wafer Butterfly Valve (D71X)

Standard manual wafer type butterfly valve featuring robust rubber lining. Ideal for low-friction bi-directional fluid isolation in HVAC, water processing, and industrial plumbing lines.

Key Features

Corrosion-resistant vulcanized rubber liner (EPDM/NBR) for bubble-tight seal
Compact and lightweight wafer design fits easily between standard flanges
Ergonomic multi-position hand lever allows fast opening/closing operations
Polished stainless steel or ductile iron disc minimizes flow resistance

Technical Specifications

Size Range: DN50 - DN200 (2" to 8")
Working Pressure: 1.0 MPa / 1.6 MPa
Body Material: Ductile Iron QT450 / Cast Iron
Lining Material: EPDM / NBR / PTFE
Connection Standard: ANSI / DIN / JIS / GB Wafer

Parts & Materials List

Valve Body: Ductile Iron QT450
Body Seat/Liner: Fully Vulcanized EPDM / NBR Rubber
Internal Disc: Polished Stainless Steel 304 / 316
Stem / Shaft: Stainless Steel 416 / 2Cr13
Hand Lever: Die-cast Aluminum / Spheroidal Iron

Applications

Water supply & distribution
Wastewater and sewage networks
Industrial process pipelines
HVAC systems

Quality & Testing

100% shell and seat pressure testing per GB/T13927 or EN 12266-1; epoxy resin coating tested for corrosion resistance.

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Frequently Asked Questions

What standards and connection types are available for Wanlian valves?

Wanlian valves are manufactured to GB, ANSI, DIN and JIS standards on request. Flanged, grooved, wafer and threaded connections are available depending on the model. Tell our engineers your DN/PN and connection type in the inquiry and we will confirm the matching configuration.

What materials are used for the valve body and sealing?

Bodies are typically ductile iron (QT450), cast iron or cast/forged steel depending on the model. Sealing elements use EPDM or NBR rubber, and stems are stainless steel (2Cr13/304). Material options can be customized for specific media and temperature ranges.

What is the MOQ and lead time?

Standard MOQ is typically 20 units per model for stock sizes, with production lead times of 15-30 days depending on quantity and customization. Sample orders are available for pre-shipment testing.

How are the valves tested before shipment?

Every valve undergoes 100% shell and seat pressure testing in accordance with the applicable standard (e.g. GB/T13927, EN 12266-1). Test reports and third-party inspection can be arranged on request.