Dyna-Flo Control Valve Services

Direct-acting globe-style control valve that throttles flow through the linear motion of a sliding-stem plug, paired with a spring-and-diaphragm actuator for precise, stable process control.

• 1"–16", ASME Class 150–2500
• Cage-guided balanced or unbalanced trim
• Anti-cavitation & low-noise trim options
• Spring-diaphragm or piston actuation

High-capacity rotary control valve with a segmented or full ball for throttling and on/off service, delivering high flow with tight shutoff and a compact face-to-face footprint.

• 1"–24", ASME Class 150–900
• Segmented (570) or full-ball (590) designs
• High Cv, wide rangeability
• Throttling or on/off service

Heavy-duty eccentric plug rotary valve with a self-aligning plug and straight-through flow path, combined with a low-profile spring-and-diaphragm actuator for tight shutoff at higher flow capacities in severe service.

• 1"–6" (DN 25–150), Class 150–600
• ANSI/FCI Class IV or VI shutoff
• WCC / CF3M body, quarter-turn
• Low-emission packing & NACE options

Compact integral valve-and-actuator unit engineered for dump-valve and tight-shutoff applications where space is limited, combining the control element and actuator in a single assembly.

• 1" & 2", ASME Class 150–1500
• Integral actuator, compact footprint
• Ideal for dump-valve service
• Fast, repeatable response

Large-diaphragm spring-and-diaphragm actuators for low-pressure pneumatic operation. The spring drives the valve to a fail-safe position on loss of air supply — DFC fails closed, DFO fails open.

• Signal 3–15 or 6–30 PSIG
• Nominal effective area 46–220 in²
• -40°F to 180°F service
• Handwheel & travel-stop options

Large-diaphragm rotary actuator for low-pressure operation, using a spring for fail-safe positioning to automate quarter-turn valves for throttling or on/off control of liquids and gases.

• Signal 0–18 or 0–33 PSIG
• Valve shaft 1/2" to 2"
• Field-reversible action
• -40°F to 180°F service

High-force double-acting pneumatic piston actuator for linear valves. With a positioner or two-position signal it handles throttling or on/off control; a volume tank holds the fail position.

• Thrust up to ~16,940 lbf
• Min cylinder pressure 20 PSIG
• Valve stem 3/4", 1", 1-1/4"
• -40°F to 180°F service

High-torque double-acting pneumatic piston actuator for quarter-turn valves, providing throttling or on/off control with a volume tank to hold the fail-safe position.

• Torque up to ~65,000 lbf-in
• 90° rotation, shaft 1/2"–2-1/2"
• Min cylinder pressure 20 PSIG
• -40°F to 180°F service

Bracket-mounted, direct-acting spring-and-diaphragm actuator that operates butterfly valves, chokes and louvers for throttling or on/off control without a conventional yoke.

• Signal 35 PSIG
• Bolt circle 2-7/8" or 3-7/8"
• Butterfly, choke & louver service
• -40°F to 180°F service

Field-mounted pneumatic pressure controller offering proportional-only or proportional-plus-reset control, with field-reversible direct/reverse action and emission-compliant, NACE-ready construction.

• Output 3–15 or 6–30 PSIG
• Repeatability 0.5% of range
• Field-reversible direct/reverse
• Meets EPA emission standards

Displacer-type liquid level controller with an innovative relay manifold for easy maintenance; the displacer arm seal is serviceable without disturbing the vessel connection, with zero steady-state bleed.

• Max sensor pressure 3,750 PSIG
• Pneumatic (5000) or electric (5000E)
• Zero bleed in steady state
• -20°F to 400°F ambient

Digital electro-pneumatic valve positioner with on-board programming and a built-in LCD, HART-ready with optional Profibus and Foundation Fieldbus communication for linear or rotary valves.

• Input 4–20 mA, HART ready
• On-board LCD & auto-setup
• Linear or rotary mounting
• -40°F to 176°F service

Rugged pneumatic valve positioner for linear or rotary control valves, with optional 4–20 mA feedback, internal limit switches, a high-flow Cv module and position-indicator windows.

• Input 3–15 / 6–30 PSIG or 4–20 mA
• Travel 1/2"–6" or 90° rotary
• Optional feedback & limit switches
• -40°F to 185°F service

Compact, lightweight supply regulator delivering clean, stable pressure to pneumatic and electro-pneumatic instrumentation, engineered for the accuracy and repeatability that digital instruments demand.

• Inlet up to 250 PSIG
• Outlet 0–35 / 0–60 / 0–125 PSIG
• NACE (MR0175) & non-relieving options
• -40°F to 300°F service

High-performance current-to-pressure (I/P) transducer for hazardous environments, converting a 4–20 mA electrical input into a stable pneumatic output to drive control valve actuators.

• Input 4–20 mA
• Output 0–18 / 0–20 / 0–33 / 0–35 PSIG
• FM / CSA / Natural Gas approved
• -40°F to 158°F service