Shijiazhuang Dongli Petroleum Machinery (DLSY) supplies replacement parts for the Demco 4 in gate valve, also listed as the Demco gate valve 4 in. Our 23 stocked items include nickel-plated gates, seat assemblies, stem screws, stem seal assemblies, retainers, index pins and secondary seals for 2 in, 3 in and 4 in valves. All parts are built to interchange with Demco OEM components and are exported under HS code 84139100.
FAQ
Which Demco gate valve parts do you stock?
We stock 23 items for Demco gate valves, including 2 in gate valve 1031-2522110, 4 in nickel-plated gate 1926-002, seat assembly 2207-021, stem screws, stem seal assemblies, retainers, index pins and secondary seals.
Do you cover sizes other than 4 in?
Yes. Our listed parts also cover 2 in and 3 in Demco gate valves, including seats, gates, stem screws and seal assemblies.
Are these parts interchangeable with Demco OEM parts?
Yes. Parts are manufactured to OEM fit and function and are cross-referenced to Demco part numbers.
Can you ship Demco valve parts internationally?
Yes. We export to Canada, the United States and other oil and gas markets under HS code 84139100.
How do I order the right stem seal assembly?
Send us your valve size and part number — for example stem seal assembly 1949-001 for 2 in valves or 1951-001 for 4 in valves — and we will confirm the match.