Deionizing Water Systems
Mark 50 Series ⟶
Self-Operated Sliding Gate Back Pressure Regulator; Quick Ship Available
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 ⟶
High Sensitivity
Mark 52 Series ⟶
Internally Piloted
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 60 Series ⟶
Self-Operated Sliding Gate Pressure Reducing Regulator; Quick Ship Available
Mark 601/602 Series ⟶
Self-Operated, High Flows
Mark 60HP Series ⟶
High Pressure Regulator
Mark 61 Series ⟶
High Sensitivity
Mark 62 Series ⟶
Internally Piloted Regulator
Mark 63/64 Series ⟶
Differential Pressure Regulators; Sliding Gate Seat; 1/4″ – 2″ (DN8 – DN50);
Mark 66/660 Series ⟶
Air Loaded Pressure Reducing Regulator, Sliding Gate Seat, High Accuracy
Mark 67/69 Series ⟶
Pilot-Operated, High Flow
Mark 675 Series ⟶
Wafer Style, Jorlon Diaphragm
Mark 68G Series ⟶
Pressure Reducing Globe Valve, High Capacity, Accurate; Sizes: 1/4″ – 2″ (DN8 – DN50)
Mark 68HP Series ⟶
High Pressure Regulator
Mark 686G Series ⟶
Air-Loaded, Globe Trim, ANSI IV or VI
Mark 630 Series ⟶
Gas Regulator, Self-Operated, High Inlet Pressure
Mark 687 Series ⟶
Piloted Pressure Reducing Regulator for
Critical Low Pressure, High Flow Applications
1-1/2" - 2" (DN40 - DN50); Balanced Plug
Mark 70 Series ⟶
Sliding Gate Jorlon Diaphragm Control Valve
Mark 701/702 Series ⟶
Sliding Gate Control Valve for High Flow, Higher Cv's (Kv's)
Mark 78 Series ⟶
Globe Style, Accurate Performance
Mark 75 Series ⟶
Wafer Style, Motor Operated, Very Precise
Mark 75HW Series ⟶
Wafer Style, Hand Operated, Precise Adjustment
Mark 75MV Series ⟶
Wafer Style, Motor Operated Control Valve; Sliding Gate; 1″ - 8″ (DN25 - DN200)
Mark 75PTP Series ⟶
Piston Operated with Smart Positioner
Mark 33 Series ⟶
Boiler Feedwater Control Valve; Motor Operated Sliding Gate; 1/4″ – 2″ (DN8 – DN50)
Mark 37 Series ⟶
Motor Operated Control Valve With Electronic Linear Actuator; 1/4″ – 6″ (DN8 – DN150)
Mark 39 Series ⟶
Motor Operated Three Way
Mark DBAQ Series ⟶
Angle Style Control Valve
Mark CFR Series Pressure Reducing Filter Regulators ⟶
Filter Regulators
Mark D & DA Series ⟶
Globe & Angle Control Valve
Mark ED & ET Series (1″ – 6″) ⟶
Globe Style Control Valve
Mark ED & ET Series (8″) ⟶
Globe Style Control Valve
Mark EW Series ⟶
Globe Style Control Valves
Mark EZ Series ⟶
Globe Style Control Valve
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In applications where ultra-pure water is essential—like pharmaceuticals, electronics manufacturing, labs, and boiler feed treatment—there’s no room for compromise. Deionizing (DI) water systems rely on precise control to remove dissolved salts and ions, and that means using valves and regulators you can trust to maintain purity and system integrity.
Our range of valves for DI water systems includes corrosion-resistant regulator valves, high-purity pressure regulators, and precision control valves—all designed to perform reliably in low-conductivity environments. They help prevent contamination, ensure consistent flow and pressure, and support critical processes like rinse cycle control and resin bed regulation.
Whether you’re fine-tuning a new system or maintaining an existing one, our valves are built to deliver dependable, long-lasting performance in even the most demanding water purification setups.