We supply and service Plug Valves & Actuated Valve Packages in Michigan (MI), Ohio (OH), Illinois (IL), Indiana (IN), Pennsylvania (PA), Iowa (IA), Kentucky (KY), West Virginia (WV), Wisconsin (WI) and surrounding states.
Flowserve Durco Mach 1 High Performance Plug Valves
Flowserve has reinvented the non-lubricated plug valve to provide these new performance enhancing features:
Lower, constant turning torques comparable to ball valves and significantly lower than other plug valves.
Higher temperature capability more comparable to gate and triple-offset butterfly valves.
Easy seat replacement with valve in-line; no special tooling required.
Durco T4E Valves features a thick, continuous PFA liner which is locked to the body by T-slots. Since the PFA covers all wetted parts of the body the customer can save by not having to use high alloy materials for the body. The plug is PFA-encapsulated and the PFA covering extends up the stem through the top cap. The large sealing surfaces of this valve insure drop-tight shut-off. These valves are bidirectional and totally independent of line pressure. The primary seal to the atmosphere is between the plug and the seal band at the top of the liner. As a secondary seal, a dynamic self-adjusting , self-energized reverse-lip PFA diaphragm seal prevents stem leakage. If line pressure should force liquid to the stem seal area, the self-energizing reverse lip PFA diaphragm will be forced against the stem to prevent external leakage. If a leak occurs, simply re-seat the plug with a quick and easy in-line adjustment. An open-end wrench and a few seconds are the extent of your maintenance requirements.
The non-lubricated plug valve for the most corrosive and difficult chemical services where drop-tight shutoff is an absolute requirement. All Durco G4 SLEEVELINE valves offer the proven reliability of the plug/PTFE sleeve primary seal with a PFA diaphragm secondary seal. The unique reverse lip diaphragm provides a self-energizing dynamic stem seal where pressure activates the reverse lip to seal against the stem. It also provides a static seal by wedging against the stem with an interference fit.
Designed for reliable performance and long life in high cycle on-off or modulating services, the Durco G4B Marathon plug valve can be used with confidence in applications where tight shutoff and emissions containment are priority requirements. A pair of Viton O-rings prevents stem leakage while containing line pressure. Fugitive emission containment is often equal to more expensive severe or toxic service valves.
Flowserve's Durco TSG4, triple-sealed plug valve is ideal for lethal, toxic and large delta T services where an absolute stem seal is required. The Durco TSG4 meets or exceeds the federal Clean Air Act fugitive emissions regulations at one-third to one-half the cost of bellows sealed valves. With its true stuffing box design, the Durco TSG4 easily handles tough services such as chlorine, anhydrous HCI and hydrofluoric acid.