Design features
a welded bellows element around the stem; confirm its sealing arrangement and the backup packing for the selected design
Final dimensions, materials, ratings and documentation depend on the approved configuration.
Gate valves / LIANGGU
Bellows Seal Gate Valve
This model is a gate valve with a welded bellows element around the stem. The sealing arrangement and any backup packing are confirmed for the selected design. For a project quotation, share the required size, pressure designation, materials, seating, connections and quantity. Final suitability is confirmed against the approved specification.
PRODUCT DETAILS
Understand this valve.
Working principle
a stem moves a wedge or parallel gate clear of the bore for isolation; the valve should normally be fully open or fully closed, not used as a routine throttling device; verify pressure-temperature cycle and leak acceptance
Typical applications
thermal oil, hazardous fluids, vacuum duties, and services where fugitive leakage control matters
Selection priorities
bonnet envelope, pressure-temperature cycle, leak acceptance, bellows material and cycle life, and backup packing
SPECIFICATION REVIEW
Define the required configuration.
Manufacturer-listed options remain subject to the selected design and service. They are not fixed specifications for every configuration.
| Size / DN or NPS | Project-specific — include in your RFQ |
|---|---|
| Pressure designation | Project-specific — include in your RFQ |
| Common material options | Manufacturer optionCarbon steel, low-temperature steel, stainless steel, alloy steel, or another approved alloy after service and fabrication review |
| End connection & standard | Manufacturer optionFlanged or butt-welded ends matched to the approved piping class and selected product design |
| Actuation & accessories | Manufacturer optionManual, geared, electric, pneumatic, or hydraulic operation only where the selected design and duty support it |
| Design standards | Manufacturer optionAPI 600, API 602, API 6D, or a project product standard as the construction and service require; testing and interfaces must be specified separately |
| Lead time & documentation | Confirmed in the written quotation |
Other materials & project configurations
Listed materials are common options, not an exhaustive range. Share the required grade and service conditions so we can review suitability, manufacturing feasibility and availability.
Catalogue information supports the enquiry. Approved technical documents define the final supply.
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