Lift Plug Valves
SchuF is the inventor of the Lift Plug Valve - the first double block and bleed switch and/or isolation valve.
Model 12 - "IsoPlug" - Lift Plug Valve
The original patent was received in 1914. Today, the Lift Plug is widely used in the Chemical, Refinery (including Delayed Coking, Hydrocracking, and Visbreaking), Polymer, Cement, Power and Mining industries.
Lift Plug Valve Applications
It’s simple and rugged design make it suitable for severe applications at high temperatures or with highly abrasive or erosive materials. In the Delayed Coking industry, the SchuF lift Plug is utilised as a an Isolation and Switch valve. In visbreaking, cracking, hydroprocessing, distillation and deasphalting refinerary applications, the lift plug has proven to be an ideal isolation valve with many advantages over traditional ball valves and t-pieces.
This is due to the fact that the seals do not wear as the plug is lifted before turning.
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The original Lift Plug from 1914 Lift Plug with inverted Plug
In addition the valve has three lines of defence against sediment build up or fouling:
1) Flushing is initiated during plug lifting and turning
2) An integral drain valve option enabling sediment to be removed from the valve
3) A retractable bottom plate that enables the valve to be cleaned in line in a very short period of time
The three factors together make the SchuF lift plug ideal for dirty, sticky or clumping media at high temperatures.
Characteristics of SchuF Plug Valves
- Available with 2, 3 or 4 outlets
- Seat seal design ensures a perfect seal
- Seals are not worn during operation
- No dead spaces
- Integral Block and Bleed
- Available in high temperature and pressure designs
- Electric, pneumatic, and hydraulic actuation available
- Straight or Inverted Plug, full or reduced bore, round or oval
- Top or bottom entry for easy maintenance
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SchuF IsoPlug for Delayed Coking
Lift Plug Valve Sizing
Depending on application, sizes from half inch to 36 inch and bigger on request. Please see attached PDF for more detailed information.
Material Choice
Lift Plug valves are available in Carbon and stainless steel, all Nickel based alloys and exotics such as Titanium, Zirconium and ceramics.
Lift Plug Valve Model Numbers
Models 12 and 14
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