Valves & Parts
D381X-16Q Grooved Butterfly Valve (Worm Gear)
D381X-16Q grooved-end butterfly valve with worm gear operator for fire and water pipelines. Nodular cast iron (QT450) body with electrophoretic coating, PN16 pressure rating and signal lock option for status indication.
Key Features
- Worm gear operator with handwheel for smooth control
- Grooved ends for fast mechanical coupling installation
- Nodular cast iron (QT450) body with electrophoretic coating
- Signal locking device option for open/closed status indication
- Suitable for fire protection and water pipelines
Technical Specifications
- Model
- D381X
- Size Range
- DN50 - DN300
- Material
- Nodular Cast Iron (QT450)
- Pressure
- PN16
- Connection
- Grooved Ends
- Operation
- Worm Gear with Handwheel
- Bearing Capacity
- 10 - 50 kN
- Coating
- Electrophoretic
- Customization
- OEM
Parts & Materials List
- Valve Body
- Nodular Cast Iron (QT450)
- Disc
- Ductile Iron / Stainless Steel
- Seat
- EPDM Rubber Lining
- Operator
- Cast Iron Worm Gear Box
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.
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.
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