Disassembly, Repair, and Rebuild of the Jordan Mark 78 Control Valve

The Jordan Mark 78 pneumatic control valve is designed for accurate performance and simplified maintenance. This versatile product can be used on a variety of applications, including viscous/corrosive liquids, process gases or steam in process or utility service.

• Shutoff: ANSI Class IV or VI
• Sizes: 1/2" – 2" (DN15 – DN50)
• End Connections: Threaded, Flanged, Socket Weld, Butt-Weld
• Body Materials: Bronze, Carbon Steel, Stainless Steel
• Cv (Kv): up to 50 (up to 43)
• Trim Materials: Stainless Steel, Monel, Hastelloy C, Alloy 20
• Seat: ANSI Class IV (Hard Seat); ANSI Class VI Teflon (Soft Seat)
• Control Ranges: 3-15 psi, 6-30 psi or split ranges (0,2-1,0 bar, 0,4-2,1 bar)

The video below provides a detailed demonstration of how to disassemble, repair, and rebuild the Mark 78 control valve.

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