Valves & Parts
Flanged Manual Bellows Seal Gate Valve
Forged/Cast steel manual bellows seal gate valve. Double sealing barrier (bellows + packing) ensures zero fugitive leakage. Specifically designed for thermal oil, high-temperature water, and steam pipelines.
Key Features
- High-durability metal bellows seal prevents any steam or fluid leak
- Double sealing system (packing + bellows) prevents accidental emission
- Forged/Cast steel body holds extreme mechanical and temperature pressure
- Conforms strictly to international standards (GB, ANSI, DIN, JIS)
Technical Specifications
- Size Range
- DN15 - DN300 (1/2" to 12")
- Working Pressure
- 1.6 - 4.0 MPa (Class 150/300)
- Working Temperature
- -29°C to 425°C
- Body Material
- Forged Steel (A105) / Cast Steel (WCB)
- Medium
- Thermal Oil, Steam, High-Temperature Water
Parts & Materials List
- Valve Body
- Carbon Steel (WCB) / Forged Steel (A105)
- Bellows
- Stainless Steel 304 / 316Ti
- Valve Disc Seal
- Stellite / SS304 Hard Alloy
- Handwheel
- Ductile Iron / Cast Steel
- Yoke Nut
- Copper Alloy
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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