Fractional Flow Control Valves
A complete line of pneumatic and electrically actuated control valves designed to ensure precision control on your most critical micro-flow applications.
Precision Control, Fractional Flow Control
Valve
The Mark 708 Series provides accurate control on fractional flow applications. It is a complete line of pneumatic and electrically actuated control valves designed to enhance performance to ensure precision control on your most critical micro flow applications.
Maximum Inlet Pressure Diaphragm Control Valve
Short Pattern Fractional Flow Control Valve
The Mark 708SH was developed to provide the most accurate control available for fractional flow services; whether for pilot plant installations, test stands, R & D facilities or for specialized processes such as dosing, injection and venting applications. The Short Pattern, 1/4″ offers Cv’s ranging from 0.00001 through 0.2 (0,000009 to 0,17 Kv in DN8). A small package ideal for critical fractional flow applications where space is at a premium.
Bellow Stem Seals Fractional Flow Control Valves
Bellows stem seals eliminate fugitive emissions by surrounding the valve stem with a pressure-tight barrier, isolating the stem from the process fluid and preventing leakage to the atmosphere. For an extra measure of protection, the bellows stem seal option provides a back-up seal of Teflon or Graphite/Grafoil packing along with a threaded or NPT detection port for use in monitoring potential emissions leakage.
Extended Bonnet Fractional Flow Control Valve
The Mark 708CR for cryogenic service features a 9″ bonnet extension (optional 14″) that provides protection for the packing and actuator by preventing ice build-up, which can interfere with movement of the valve stem and affect valve performance. For cryogenic services with temperatures as low as -320°F (-195°C).
Double Packing Fractional Flow Control Valve
An alternative to a bellows stem seal, it is used when standard packing will not adequately contain the controlled media. With a double packed bonnet, lubricant is pumped into the packing sets, providing a tight seal similar to bellows stem seal.
High Pressure Control Valve
An 8000 psi (552 bar) maximum inlet fractional flow control valve. This rugged, compact control valve is suitable for a variety of industrial and research applications. Linear and equal percentage flow characteristics are available with Cv’s ranging from 0.05 (0,04 Kv) to 1.25 (1,1 Kv). In addition, it is available in a variety of end connection and optional materials of construction making it a versatile solution to your demanding valve requirements.
High Pressure Angle Control Valve
A 12,000 psi (827 bar) maximum inlet fractional flow control valve. Linear and equal percentage flow characteristics are available with Cv’s ranging from 0.5 (0,04 Kv) to 1.25 (1,1 Kv). The Mark 708HPA is available in a variety of end connections and optional materials of construction making it a versatile solution to your most demanding valve requirements.
Finned Bonnet Fractional Flow Control Valve
The cooling fin bonnet option is for the protection of the stem packing from elevated temperatures associated with steam, hot water, and high temperature oil, gas and liquid services (up to 1000°F; 538°C). The finned bonnet cools the area around the packing, which permits the use of standard packing materials that otherwise would not be suitable for the service temperature conditions.
Motor Control Valve
The Mark 708MV offers several advantages including extreme accuracy, high turndown ratios and repeatability. The Mark 708MV includes a switch-selectable power supply, a hand drive mechanism for manual operation and a 4-20mA current input signal. Upon loss of input (not loss of power), the motor is designed to either lock in place or fail to minimum input signal position.
Angle Control Valves
High pressure angle control valves with a variety of end connections and optional materials. Ideal for high pressure industrial, research and offshore well system chemical injection applications.
High Pressure Angle Control Valve
A 12,000 psi (827 bar) maximum inlet fractional flow control valve. Linear and equal percentage flow characteristics are available with Cv’s ranging from 0.5 (0,04 Kv) to 1.25 (1,1 Kv). The Mark 708HPA is available in a variety of end connections and optional materials of construction making it a versatile solution to your most demanding valve requirements.
Electric Control Valves
Motor control valves with extreme accuracy, high turndown ratios and repeatability. For chemical injection, dosing, pilot plants research labs, and skid builders.
Motor Control Valve
The Mark 708MV offers several advantages including extreme accuracy, high turndown ratios and repeatability. The Mark 708MV includes a switch-selectable power supply, a hand drive mechanism for manual operation and a 4-20mA current input signal. Upon loss of input (not loss of power), the motor is designed to either lock in place or fail to minimum input signal position.
High Pressure Control Valves
High pressure heavy duty control valves requiring full or fractional flow and angle high pressure control valves for fractional flow.
High Pressure Control Valve
An 8000 psi (552 bar) maximum inlet fractional flow control valve. This rugged, compact control valve is suitable for a variety of industrial and research applications. Linear and equal percentage flow characteristics are available with Cv’s ranging from 0.05 (0,04 Kv) to 1.25 (1,1 Kv). In addition, it is available in a variety of end connection and optional materials of construction making it a versatile solution to your demanding valve requirements
High Pressure Angle Control Valve
A 12,000 psi (827 bar) maximum inlet fractional flow control valve. Linear and equal percentage flow characteristics are available with Cv’s ranging from 0.5 (0,04 Kv) to 1.25 (1,1 Kv). The Mark 708HPA is available in a variety of end connections and optional materials of construction making it a versatile solution to your most demanding valve requirements.
Heavy Duty Control Valve
The Mark 8000 Series is a group of heavy duty control valves specifically designed for process applications requiring full flow or fractional flow control. Available with a wide selection of body sizes and styles, this valve can be configured in 2-way or 3-way designs, for diverting or mixing service and with globe or angle valve style seats.
Mixing/Diverting Control Valves
Three way, light-weight control valves for mixing in low flow process applications and three way control valves for mixing or diverting services.
Three Way Control Valve
The Mark 709 is a lightweight control valve for use as a mixing valve in low flow process applications. Featuring a three-way body design, it is constructed with two inlets to blend two separate flow streams into a common outlet, creating a third fluid.
Three Way Control Valve
The three-way 8000T can be specified for use on mixing or diverting services. As a mixing valve, it is designed with two inlets to blend two separate flow streams into a common outlet creating a third fluid. For diverting service, the valve features one inlet and two outlets, allowing you to divert the flow from one outlet to the other as required to bypass heat exchangers, cooler filters, or other pieces of process equipment.
Pneumatic Control Valves
Pneumatic control valves available with many options including bellows stem seals, extended bonnet, double packing or finned bonnet.
Precision Control, Fractional Flow Control Valve
Maximum Inlet Pressure Diaphragm Control Valve
Short Pattern Fractional Flow Control Valve
The Mark 708SH was developed to provide the most accurate control available for fractional flow services; whether for pilot plant installations, test stands, R & D facilities or for specialized processes such as dosing, injection and venting applications. The Short Pattern, 1/4″ offers Cv’s ranging from 0.00001 through 0.2 (0,000009 to 0,17 Kv in DN8). A small package ideal for critical fractional flow applications where space is at a premium.
Bellow Stem Seals Fractional Flow Control Valves
Bellows stem seals eliminate fugitive emissions by surrounding the valve stem with a pressure-tight barrier, isolating the stem from the process fluid and preventing leakage to the atmosphere. For an extra measure of protection, the bellows stem seal option provides a back-up seal of Teflon or Graphite/Grafoil packing along with a threaded or NPT detection port for use in monitoring potential emissions leakage.
Extended Bonnet Fractional Flow Control Valve
The Mark 708CR for cryogenic service features a 9″ bonnet extension (optional 14″) that provides protection for the packing and actuator by preventing ice build-up, which can interfere with movement of the valve stem and affect valve performance. For cryogenic services with temperatures as low as -320°F (-195°C).
Double Packing Fractional Flow Control Valve
An alternative to a bellows stem seal, it is used when standard packing will not adequately contain the controlled media. With a double packed bonnet, lubricant is pumped into the packing sets, providing a tight seal similar to bellows stem seal.
High Pressure Control Valve
An 8000 psi (552 bar) maximum inlet fractional flow control valve. This rugged, compact control valve is suitable for a variety of industrial and research applications. Linear and equal percentage flow characteristics are available with Cv’s ranging from 0.05 (0,04 Kv) to 1.25 (1,1 Kv). In addition, it is available in a variety of end connection and optional materials of construction making it a versatile solution to your demanding valve requirements.
High Pressure Angle Control Valve
A 12,000 psi (827 bar) maximum inlet fractional flow control valve. Linear and equal percentage flow characteristics are available with Cv’s ranging from 0.5 (0,04 Kv) to 1.25 (1,1 Kv). The Mark 708HPA is available in a variety of end connections and optional materials of construction making it a versatile solution to your most demanding valve requirements.
Finned Bonnet Fractional Flow Control Valve
The cooling fin bonnet option is for the protection of the stem packing from elevated temperatures associated with steam, hot water, and high temperature oil, gas and liquid services (up to 1000°F; 538°C). The finned bonnet cools the area around the packing, which permits the use of standard packing materials that otherwise would not be suitable for the service temperature conditions.
Three Way Control Valve
The Mark 709 is a lightweight control valve for use as a mixing valve in low flow process applications. Featuring a three-way body design, it is constructed with two inlets to blend two separate flow streams into a common outlet, creating a third fluid.
Back Pressure Regulators
Back pressure regulators are designed to handle very high pressure and very low flows. USDA and FDA approved soft goods available upon request.
Gas Back Pressure Regulating Valve
The JB Series line of back pressure regulators have the ability to handle very high pressures and very low flows. USDA and FDA approved soft goods available upon request
High Cv Diaphragm Back Pressure Regulating Valve
The JBDL Series is a diaphragm operated, balanced trim, back pressure regulator. The 1.95 Cv (1,69 Kv) offers increased flows across its 1200 psi (83 bar) inlet range, while the DEL-F soft seat provides ANSI Class VI shutoff. Five set spring ranges and three soft seal options offer the customer flexibility in a number of applications and environments. USDA and FDA approved soft goods available upon request.
Piston Sensed, Back Pressure Regulating Valves
The JBPH Series is a piston operated back pressure regulator. The 0.5 Cv (0,43 Kv) offers increased flows across its 6000 psi (414 bar) inlet range, while the KEL-F soft seat provides ANSI Class VI shutoff. USDA and FDA approved soft goods available upon request.
High Pressure Back Pressure Regulating Valve
The Mark 5800HP Series is a high pressure, back pressure regulator designed to maintain upstream pressure of gases and liquids. As a compact, lightweight product, it is well suited for applications where space and weight are at a premium. The T-bar adjusting handle allows for a lighter spring and more sensitive regulator than models with a fixed knob. USDA and FDA approved soft goods available upon request.
High Pressure Back Pressure Regulator
The Mark 5850HP is a high pressure, back pressure regulator designed to maintain upstream pressure of gases and liquids. With a robust piston design, the Mark 5850HP can handle setpoints up to 5000 psig (345 bar) at 450°F (232°C) with ease. USDA and FDA approved soft goods available upon request.
Pressure Reducing Regulators
Pressure reducing regulators with the ability to handle very high pressures and very low flows, low set pressures and very low flows and piston operated regulators with high Cvs.
New digital pressure control technology with integrated microcontroller.
Configured to meet specified range from vacuum to 150 psig / 10 bar(g)
– Dual proportional valve control with integrated digital microcontroller
– Closed loop control
– 4-20mA, 0-10V or 3.3V serial command
– Gauge, vacuum, and absolute pressure models
– No integral bleed required
– IP65 enclosure
– CE models available
New digital pressure control technology with integrated microcontroller.
Configured to meet specified range up to 500 psig /35 bar(g)
– Dual proportional valve control with integrated digital microcontroller
– Closed loop control
– 4-20mA, 0-10V or 3.3V serial command
– Gauge, vacuum, and absolute pressure models
– No integral bleed required
– IP65 enclosure
– CE models available
Digital electronic pressure control with microprocessor and keypad control.
Series of models to specified range from vacuum to 150, 500, 1000 or 3000 psig / 10, 35, 70 or 200 bar(g)
– Dual proportional valve control with digital microprocessor
– Closed loop control
– Gauge, vacuum, and absolute pressure models
– Direct control from keypad
– No integral bleed required
– Ip40 enclosure
– CE models available
Standard analog electrnic pressure controller. Easily modified for custom applications.
Configured to meet specified range from vacuum to 150 psig / 10 bar(g)
– Dual proportional valve control with analog electronic control circuit
– Closed loop control
– 4-20mA or 0-10V command]
– Gauge, vacuum, and absolute pressure models
– Bleed orifice for static applications or dynamic applications needing max stability
– IP65 enclosure
– CE models available
Standard analog electronic pressure controller. Easily modified for custom applications.
Configured to meet specified range up to 500 psig /35 bar(g) max
-Dual valve control with analog electronic control circuit
– Closed loop control
– 4-20mA or 0-10V command
– Gauge, vacuum, and absolute pressure models
– IP65 enclosure
– CE models available
Standard analog electronic pressure controller. Easily modified for custom applications.
Configured to meet specified range up to 1000 psig /69 bar(g) max
– Dual valve control with analog electronic control circuit
– 4-20mA, 0-10V and RS232 digital command options
– Gauge, vacuum, and absolute pressure model
– No gas consumed at steady state
– IP65 enclosure
High Pressure Regulators
A complete line of high pressure regulators including self-operated, diaphragm-sensed and piston-sensed.
The JR Series line of high pressure regulators have the ability to handle very high pressures and very low flows. USDA and FDA approved soft goods available upon request.
The JRDL Series line of diaphragm sensed, high pressure regulators have the ability to handle very high pressures and very low flows. USDA and FDA approved soft goods available upon request.
The JRH Series of high pressure regulators has the ability to handle high pressures as well as low flows. USDA and FDA approved soft goods available upon request.
The JRHF Series is a diaphragm operated, balanced trim pressure regulator. The choice between 1.5 and 1.9 Cv (1,3 and 1,6 Kv) offers increased flows across the JRHF’s 230 psi (15,8 bar) inlet range, while the PTFE soft seat provides ANSI Class VI shutoff. Four set spring ranges and three soft seal options offer the customer flexibility in a number of applications and environments. These valves are designed to regulate a variety of gases and liquids in applications where high flows and low control pressures are required. USDA and FDA approved soft goods available upon request.
The 1/4″ JRPH Series and JRPL Series are piston operated pressure regulators that offer excellent control at Cv’s of 0.20 (0,17 Kv) and lower. There are six set ranges for the JRPH Series and two set ranges for the JRPL Series. Elastomer seals are used throughout with Buna-N, EPDM and Viton being standard options. USDA and FDA approved soft goods available upon request.
The JRPH & JRPL Series are piston operated, balanced trim pressure regulators with high Cvs and KEL-F soft seat for ANSI Class VI shutoff. There are three set ranges for each model. Elastomer seals are used throughout with Buna-N, EPDM and Viton being standard options, along with matching back up seals. USDA and FDA approved soft goods available upon request.
The JB Series line of back pressure regulators have the ability to handle very high pressures and very low flows. USDA and FDA approved soft goods available upon request
The JBDL Series is a diaphragm operated, balanced trim, back pressure regulator. The 1.95 Cv (1,69 Kv) offers increased flows across its 1200 psi (83 bar) inlet range, while the DEL-F soft seat provides ANSI Class VI shutoff. Five set spring ranges and three soft seal options offer the customer flexibility in a number of applications and environments. USDA and FDA approved soft goods available upon request.
The JBPH Series is a piston operated back pressure regulator. The 0.5 Cv (0,43 Kv) offers increased flows across its 6000 psi (414 bar) inlet range, while the KEL-F soft seat provides ANSI Class VI shutoff. USDA and FDA approved soft goods available upon request.
The Mark 5800HP Series is a high pressure, back pressure regulator designed to maintain upstream pressure of gases and liquids. As a compact, lightweight product, it is well suited for applications where space and weight are at a premium. The T-bar adjusting handle allows for a lighter spring and more sensitive regulator than models with a fixed knob. USDA and FDA approved soft goods available upon request.
Accessories
Top mounted positioners and side mounted positioners for control valves, pressure and temperature controllers and high pressure filters for regulators.
Top Mounted Pneumatic Valve Positioners
The Mark 15 positioner uses the full force of its air supply to drive and maintain a pneumatic actuator to position a valve to what is required by control instrument, regardless of the presence of forces that change valve position. This line of compact instruments incorporates a single-axis, force-balance principle of operation to ensure accurate and stable control valve positioning. In all cases, including bottom-loading applications, a MK15 is mounted directly on the topworks of the valve with no external levers or other exposed mechanisms.
The primary module of the Mark 16IQ is the electronic board comprised of the microprocessor, along with the indicating and control elements. The unit is designed so that optional modules for alarms and position feedback are easily plugged in or snapped on. The current command is compared to the internal position feedback signal. By comparing the input and feedback signals, an adaptive controller determines the positioning signal, which follows an optimized algorithm. The parameters for this algorithm are determined from valve and actuator characteristics analyzed during initialization and as modified during the real-time performance of the actuator. The MK16IQ will identify will identify and optimize each valve’s specific performance characteristics.
Pressure & Temperature Controller
The Mark 10 Series was designed to be used with LowFlow Valve’s pneumatic and electric control valves. Choose on the Mark 10 controllers for reliable and accurate control of pressure and temperature.
Air Loaded Pressure Regulating Valve
The JR-A Series is an air loaded version of the JR Series valve. USDA and FDA approved soft goods available upon request.
Research and sampling systems
General, corrosive and specialty gas services
Non-cavitating liquids
Industries
Gas chromatography
Flame ionization detectors
Industrial controls