Back Pressure Reducing
Mark 50 Series ⟶
Self-Operated Sliding Gate Back Pressure Regulator; Quick Ship Available
1/4" - 4", up to 200 Cv
Mark 501/502 Series ⟶
High Flow Back Pressure Regulator; Sliding Gate; 1-1/2″ – 2″ (DN40 – DN50)
Mark 50HP Series ⟶
High Pressure Back Pressure Regulator; Up to 450 psi (31 bar); 1/4" - 4" (DN8 - DN100)
Mark 51 Series ⟶
Large diaphragm, 1/4" - 3/4" size range
Mark 52 Series ⟶
Internally Piloted Back Pressure Regulator
Mark 53/54 Series ⟶
Differential, Jorlon Diaphragm
Mark 55 Series ⟶
Upstream Vacuum, Jorlon Diaphragm
Mark 56/560 Series ⟶
Dome Loaded, High Accuracy
Mark 57 Series ⟶
Pilot-Operated, Superior Accuracy
Mark 575 Series ⟶
Wafer Style, Jorlon Diaphragm
Mark 58FT/A Series ⟶
Cage Trim, Dual Inlet & Outlet for Through-Flow
Mark 58G Series ⟶
Globe Style, Back Pressure Regulating Valve
Mark 586FT/586A Series ⟶
Dome Loaded
Mark 508 Series ⟶
Direct Operated Tank De-pad Regulator or
Gas Back Pressure Regulator for low pressures
3/4″ – 2″ (DN20 – DN50)
Mark 518 Series ⟶
Direct Operated Tank De-pad Regulator or
Gas Back Pressure Regulator for low pressures
1", 2", 4" (DN25, DN50, DN100)
Mark 5108 Series ⟶
Piloted Industrial Back Pressure Regulator, Sizes: 1-1/4″ – 24″
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