
DN50 Inner-and-Outer-Ring Spiral-Wound Gasket
Ring-supported metal and graphite gasket listed by Donglai.
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Dacheng Donglai Sealing Materials Sales

Copper bonding lead listed for flanges, cable trays and cabinets.
Donglai also advertises a BVR copper bonding lead for flange bridging, cable trays, distribution cabinets and photovoltaic assemblies. This is an electrical connection accessory rather than a fluid seal. Specify conductor area, finished length and terminal holes, and confirm the required electrical performance and documentation with the supplier for the intended installation.
Dacheng Donglai Sealing Materials Sales · Langfang, Hebei
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Source reviewed: 2026-11-08. This directory summary organises the supplier’s published product information.
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Ring-supported metal and graphite gasket listed by Donglai.
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Square packing sold under a GFO description in Donglai’s listing.
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Reinforced graphite-packing enquiry from Donglai’s catalog.
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Cut or prepared graphite rings for gland sealing enquiries.
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Aramid-fiber packing with ring-form enquiries described in the listing.
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PTFE fiber packing with a 12×12 listing reference.
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Continuous flexible graphite packing for pump and valve enquiries.
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