Pilot Plant

Fractional Flow Control Valve - Mark 708SH Series
The Mark 708SH was developed by LowFlow Valve 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...
Pneumatic Control Valve- Mark 708 Series
The Mark 708 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. With Cv’s ranging from 0.00001 to 4.0...
Mark 708 with bellows stem seals that eliminate fugitive emissions
Bellows stem seals eliminate fugitive emissions by surrounding the valve 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 for Teflon, braided or...
Cryogenic Valve - Mark 708CR Series
  Mark 708CR Series – The Mark 708 for cryogenic service features a 9” bonnet extension 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...
Fractional Flow Control Valve with double packing - Mark 708DP Series
  Mark 708DP Series – The Mark 708 with double packing is an alternative to a bellows stem seal and is used when standard packing will not adequately contain the controlled media. The optional bonnet features a double packing arrangement separated by a lantern ring. With a double packed...
A 8,000 psi (552 bar) maximum inlet fractional flow control valve - Mark 708HP
The Mark 708HP is a 8,000 psi (552 bar) maximum inlet fractional flow control valve. This rugged, compact control valve is suitable for a variety of industrial and research applications. It is ideal for offshore chemical injection, hydrocarbon processing, chemical processing, high effort hydraulic...
 A 12,000 psi maximum inlet fractional flow control valve
The Mark 708HPA is a 12,000 psi maximum inlet fractional flow control valve. This rugged, compact angle body control valve is suitable for a variety of high pressure industrial and research applications. The extended pressure capability makes it the ideal valve for offshore well system chemical...
Control Valve with fin bonnet - 708HT Series
The Mark 708HT Series has a cooling fin bonnet option for protection of the stem packing from elevated temperatures associated with steam, hot water and high temperature oil, gas and liquid services. The finned bonnet cools the area around the packing, which permits the use of standard packing...
Fractional Flow Control Valve with Motor - 708ME Series
The Mark 708ME offers many advantages including extreme accuracy, high turndown ratios and repeatability. The features of this high resolution, low hysteresis digitally controlled motor makes the MK708ME a premier control valve for applications involving chemical injection, dosing, pilot plants and...
The Mark 708MV offers several advantages including extreme accuracy, high turndown ratios and repeatability. The features of his high resolution, low hysteresis digitally controlled motor makes the MK708MV a premiere control valve for applications involving chemical injection, dosing, pilot plants...
Three Way Control Valve - Mark 709 Series
  The Mark 709 three way valve 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. Minimum Data...
High pressure, back pressure regulator - Mark 5800HP Series
The Mark 5800HP 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. With a robust, piston design, the Mark 5800HP can handle setpoints...
High pressure, back pressure regulator - Mark 5850HP Series
The Mark 5850HP 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. With a robust piston design, the Mark 5850HP can handle...
High Pressure Regulating Valve - Mark 6800HP Series
The Mark 6800HP is a self-operated pressure regulating valve for use on high pressure industrial gas and liquid services to 4000 psi (276 bar). The Mark 6800HP features exceptional accuracy with high flow capacities and simple in-line maintainability. For durability and dependable service, the 1...
High back pressure regulators -JB Series
The LowFlow JB Series line of back pressure regulators have the ability to handle very high pressures and very low flows. These valves are typically used in research and sampling systems for corrosive and specialty gasses. Typical applications include gas chromatography and flame ionization...
Back Pressure Reducing Valves - JBDL Series
The JBDL Series is a diaphragm operated, balanced trim, back pressure regulator. The 1.95 Cv offers increased flow across its 1200 psi inlet range, while the Kel-F soft seat provides ANSI Class VI shutoff. Four set spring ranges and three soft seal options offer the customer flexibility in a number...
Back Pressure Regulating Valve - JBPH Series
The JBPH Series is a piston operated back pressure regulator.  The 0.5 Cv offers increased flows across its 6000 psi inlet range, while the Kel-F soft seat provides ANSI Class VI shutoff.  Four set spring ranges and three soft seal options offer flexibility in a number of applications and...
High pressure regulators - JR Series
  The LowFlow JR Series line of high pressure regulators have the ability to handle very high pressures and very low flows. These valves are typically used in research and sampling systems for corrosive and specialty gases. Typical applications include gas chromatography and flame...
High pressure regulators - JRH Series
  The LowFlow JRH Series line of high pressure regulators have the ability to handle very low pressures and low flows. These valves are typically used in research and sampling systems for general, corrosive and specialty gas service and for non-cavitating liquids. Typical applications...
Pressure Regulating Valves - JRHF Series
The JRHF Series is a diaphragm operated, balanced trim pressure regulator. The choice between 1.5 and 1.9 Cv offers increased flows across the JRHF's 230 psi inlet range, while the PTFE soft seat provides ANSI Class VI shutoff. Four set spring ranges and three soft seal options offer the customer...
Pressure Regulator - JRPH 1/4"
The 1/4" JRPH/JRPL Series are piston operated, balanced trim pressure regulators with high pressure capability and PEEK or KEL-F soft seat for ANSI Class VI shutoff. There are four set ranges for this model. Elastomer seals are used throughout with Buna-N, EPDM, and Viton being standard options....
Piston operated, balanced trim pressure regulators - JRPL/JRPH Series
The JRPL Series and JRPH Series are piston operated, balanced trim pressure regulators with high Cv's 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 PTFE...
Heavy duty control valve with bellow stem seals  - 8000BS Series
The 8000 Series the bellow stem seals eliminates fugitive emissions by surrounding the valve 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...
Mixing or diverting three way control valve - 8000T Series
The three-way Mark 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 on inlet and two outlets, allowing you to...