Industrial Valves and Pressure Regulators for Air, Oil, and Gas Utilities

Mark 50 Series ⟶

Self Operated, Sliding Gate, 1/4"- 4", Up to 200 Cv | Quick Ship Available

Mark 501/502 Series High Flow Back Pressure Regulator ⟶

Sliding Gate, Cv (Kv): up to 70 (up to 60), Sizes: 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) | Quick Ship Available

Mark 51 Series High Sensitivity Back Pressure Regulator

Mark 51 Series High Temperature Back Pressure Regulator ⟶

Large diaphragm, 1/4" - 3/4" size range

Mark 52 Series Pilot Operated Back Pressure Regulator ⟶

Internally Piloted, Lightweight Design, Sizes: 1/2" through 2" (DN15 to DN50)

Mark 53/54 Series Differential Back Pressure Regulator ⟶

Differential, Jorlon Diaphragm, Sizes: MK53: 1/4″ – 2″ (DN8 – DN50); MK54: 1/4″ – 3/4″ (DN8 – DN20)

Mark 55 Series Vacuum Back Pressure Regulator ⟶

Upstream Vacuum, Jorlon Diaphragm, Sizes: 1/4″ – 2″ (DN8 – DN50)

Mark 56/560 Series Air Loaded Back Pressure Regulator ⟶

Dome Loaded, High Accuracy, Sizes: 1/2″ – 6″ (DN15 – DN150)

Mark 57 Series Pilot Operated Back Pressure Regulator ⟶

Externally Piloted, Superior Accuracy, Sizes: 1/2″ – 6″ (DN15 – DN150)

Mark 675 Series - Wafer style pressure regulator

Mark 575 Series Self Operated Back Pressure Regulator ⟶

Wafer Style, Jorlon Diaphragm, Sizes: 3″ – 6″ (DN80 – DN150)

Mark 58FT/A Series Cage Trim Back Pressure Regulator ⟶

Cage Trim, Dual Inlet & Outlet for Through-Flow, Sizes: 1/4″ through 2″ (DN8 through DN50)

Mark 58G Series - Globe Style Back Pressure Regulating Valve

Mark 58G Series Globe Style Back Pressure Regulator ⟶

Tight Shutoff, Sizes: 1/4″ through 2″ (DN8 through DN50), Cv (Kv): up to 20 (up to 17,3)

Mark 586FT/586A Series Dome Loaded Back Pressure Regulator ⟶

Cage Trim, Sizes: 1/4″ - 2″ (DN8 – DN50), Max. Inlet Pressure: 300 psi (20,7 bar)

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 60 Series ⟶

Self-Operated Sliding Gate Pressure Reducing Regulator | Quick Ship Available

Mark 601/602 Series Self Operated Pressure Regulator ⟶

High Flows, Higher Cv (Kv) Rating, Sizes: 1-1/2″ – 2″ (DN40 – DN50)

Mark 60HP Series High Pressure Reducing Regulator ⟶

Up to 450 PSI | ANSI Class 600 Rated | Sizes 1/4″-4″ | Quick Ship Available

Mark 61 Series Self Operated Pressure Regulator ⟶

High Sensitivity, Minimum Offset, Sizes: 1/4" – 3/4" (DN8 – DN20)

Mark 62 Series Internally Piloted Pressure Regulator ⟶

Compact Design, Turndown: up to 100:1, Setpoint Range: 2 - 200 PSI

Mark 63/64 Series Differential Pressure Regulator ⟶

Sliding Gate Seat; Tight Shutoff, Sizes: 1/4″ - 2″ (DN8 – DN50)

Mark 65 Series Vacuum Pressure Regulator ⟶

Vacuum Range: 1–25″ Hg (0.035–0.886 kg/cm²), Sliding Gate Seat; 1/2″ – 2″ (DN15 – DN50)

Mark 66 Air Loaded Pressure Reducing Regulator

Mark 66/660 Series Air Loaded Pressure Regulator ⟶

Approx. rangeability: 40:1, Sliding Gate Seat, High Accuracy, Sizes: 1/2″ - 6″ (DN15 – DN150)

Mark 67/69 Series Pilot-Operated Pressure Regulator ⟶

High Flow, Setpoint: 10 to 200 psi, Sizes: 1/2″ – 6″ (DN15 – DN150)

Mark 675 Series Wafer Style Pressure Regulator ⟶

Sliding Gate Seat, Jorlon Diaphragm, Sizes: 3″ - 6″ (DN80 – DN150)

Mark 68G Series Globe Type Pressure Reducing Valve ⟶

High Capacity, Exceptional Accuracy, Sizes: 1/4″ - 2″ (DN8 - DN50) | Quick Ship Available

Mark 68HP Series High Pressure Steam Regulator ⟶

Shutoff: ANSI Class III, Sizes: 1/2" - 1" (DN15 to DN25)

Mark 686G Series Air Loaded Pressure Regulator ⟶

Globe Trim, ANSI IV or VI, Sizes: 1/4″ - 2″ (DN8 - DN50)

Mark 608 Series ⟶

Direct Operated Tank Padding Regulator or
Gas Pressure Reducing Regulator for Low Pressures
1-1/2" - 2" (DN40 - DN50)

Mark 608BP Series ⟶

Direct Operated Tank Padding Regulator or
Gas Pressure Reducing Regulator for Low Pressures
3/4" - 1" (DN20 - DN25); Balanced Plug - Good for High Inlet Pressures

Mark 608IS Series ⟶

Direct Operated Tank Padding Regulator or
Gas Pressure Reducing Regulator for Low Pressure
3/4" - 1-1/4" (DN20 - DN32); Internal Sensing - Good for Low Inlet Pressure

Mark 627 Series Spring Loaded Pressure Regulator ⟶

Self-Operated, High Inlet Pressure; Sizes: 3/4″ - 2″ (DN20 - DN50)

Mark 630 Series Gas Pressure Reducing Regulator ⟶

Self-Operated, High Inlet Pressure up to 1500 PSI, Sizes: 1″ & 2″ (DN25 & DN50)

Mark 687 Series Piloted Pressure Reducing Regulator ⟶

Critical Low Pressure, High Flow Applications
1-1/2" - 2" (DN40 - DN50); Balanced Plug

Mark 701/702 Series ⟶

Sliding Gate Control Valve for High Flow, Higher Cv's (Kv's)

Mark 78 Series ⟶

Globe Style, Accurate Performance | Quick Ship Available

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 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 CFR Series Pressure Reducing Filter Regulators ⟶

Filter Regulators

Mark ED & ET Series (1″ – 6″) ⟶

Globe Style Control Valve

Mark ED & ET Series Globe Style Control Valve ⟶

Top Entry Cage Design, Tight Shutoff, Sizes: 8"

Mark H-900, H-1500 & H-2500 Series ⟶

Globe Style Control Valves

Mark 5108 Series ⟶

Piloted Industrial Back Pressure Regulator, Sizes: 1-1/4″ – 24″

Mark 688 Series ⟶

Piloted Tank Padding Regulator or
Gas Pressure Reducing Regulator for Low Pressures
1" - 2" (DN25 - DN50)

Mark 695 Series (3/4″ – 1″) ⟶

Piloted Tank Padding Regulator
3/4", 1" (DN20, DN25); External Pilot

Mark 695 Series – 2″ ⟶

Piloted Tank Padding Regulator
2" (DN50); Internal Pilot

Mark 695X Series ⟶

Direct Operated Tank Padding Regulator
1/2" - 3/4" (DN15 - DN20)

Mark 608BPM Series Direct Operated Pressure Reducing Valve ⟶

Spring Loaded, Self Actuated, Sizes: 1" up to 10" (DN25 - DN250)

Mark 508MM Series Spring Loaded Back Pressure Valve ⟶

Self-actuated, Direct-operated, Sizes: 1" - 10" (DN25 - DN250)

Mark 608MM Series Spring Loaded Pressure Regulator ⟶

Flow to Open Design, Sizes: 1" through 10" (DN25 through DN250)

Mark 608UBAN Series Direct Operated Pressure Reducing Valve ⟶

High Capacity, Spring Loaded, Sizes: 1/2" to 2" (DN15 to DN50)

Mark 6127 Series Liquid Pressure Regulator ⟶

Pilot-operated, Heavy-duty Diaphragm, Sizes: 1-1/4" - 24"

Mark 128PQC Series ⟶

Control Valve Suitable for On-Off Dump Valve Service

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In tough industrial environments, you need control solutions you can count on. Our valves and pressure regulators for air, oil, and gas systems are built to deliver precise, reliable performance-no matter the challenge.

Whether you’re managing air pressure systems, oil processing operations, or gas handling and utility networks, our valves are designed for consistent flow control, safety, and long-term durability. We have solutions that keep your systems running smoothly.

Whether you’re planning a new system or upgrading existing equipment, our products help you maintain efficiency, reduce downtime, and ensure dependable operation across the board.