Butterfly Value

Low Pressure Drop Valve

The Midco Butterfly Valve is a low pressure drop valve suitable for control of either air or gas flow up to 5 PSI pressure. A unique spring over-run feature is used on all valves. Either manual or motorized valves are available in pipe sizes from 1" through 4".

Features & Benefits

  • 1" to 4" Pipe Size
  • Capacities to 20,000 C.F.H. Natural Gas
  • All Sizes Component Recognized By Underwriters Laboratory
  • Streamlined But Restricted Throat-to allow sensitive control of capacities normally used for given pipe size
  • 90° Closing Valve To Allow Ease of Synchronization With Shutters Using Suitable Linkage
  • Handles Air, Natural Gas or Propane Up To 5 PSI
  • Not Affected By Sulfur
  • Designed For Use With Honeywell or Penn-Johnson Modulating Motors
  • Ease of Adjustment Permitted By Spring Over-run Feature. Upper and lower limits set by stop screws regardless of motor stroke-no involved linkage adjustments necessary
  • Easy to Read Valve Position Indicator
  • Low Pressure Drop Valve
  • Temperature Rated -40°F to 250°F

Specifications

Specifications

Model
Number
Valve
Size N.P.T.
Capacity* in C.F.H. (.65
Sp. G.) at 0.3" W.C. Drop
A B C
MBF-100 1 800 2 15/16 1 3/8 1 7/8
MBF-125 1 1/4 1,300 2 15/16 1 3/8 1 3/4
MBF-150 1 1/2 1,850 2 15/16 1 9/16 1 3/4
MBF-200 2 3,100 2 15/16 1 9/16 2 1/2
MBF-250 2 1/2 5,350 3 3/4 1 13/16 2 1/2
MBF-300 3 9,100 4 2 3/16 2 1/2
MBF-400 4 20,000 4 5/8 2 3/4 3 1/4
* For air, multiply capacities by 0.8
For Propane gas, multiply capacitors by 1.62