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Product Category: Valves

Product Type: Plug Valves

Product Subtype: Non-Lubricated Plug Valves
Non-Lubricated Plug Valves - G4

The Durco G4 Sleeveline plug valve is engineered for use the most corrosive and difficult chemical services where drop-tight shutoff is an absolute requirement. It offers the proven reliability of the plug/PTFE sleeve primary seal with a fluoropolymer diaphragm secondary seal.

Brand: Durco

Non-Lubricated Plug Valves - G4BZ-HF Marathon Sleeveline HF Alkylation valve

Flowserve has supplied thousands of Durco G4BZ-HF Marathon Sleeveline HF alkylation valves to refineries throughout the world. Engineered for high-cycle, low-emissions service, this non-lubricated plug valve offers an extra measure of positive stem sealing reliability. It can be used with confidence in applications where tight shutoff and emissions containment are unconditional requirements to ensure safety.


Durco G4BZ-HF Marathon valves are Phillips Licensing listed and UOP Process Division approved for the following applications:

Brand: Durco

Non-Lubricated Plug Valves - Mach 1

The Mach 1 is a non-lubricated (sleeved) quarter turn plug valve capable of in-line service and repair.

Brand: Durco