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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 available in 1/4″ through 3/4″ line sizes (0,000009 to 3,4 Kv in sizes DN8 through DN20), the Mark 708 offers design features that will provide enhanced performance to insure precision control on your most critical micro-flow applications.
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″ offers Cv’s ranging from 0.00001 through 0.2 (0,000009 to 0,17 Kv in DN8). A small package ideal for crititial fractional flow applications where space is at a premium.
Minimum Data Requirements to Size Valve
The Mark 708 with bellows stem seals that 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.
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 temperatures as low as -425°F (-254°C).
Minimum Data Requirements to Size Valve
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 bonnet, lubricant is pumped into the packing sets, supplying a tight seal similar to that provided by a bellows stem seal. The double packed bonnet is an excellent choice when service conditions could cause damage to a bellows assembly.
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 actuators and many other high pressure 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, the Mark 708HP is available in a variety of end connections and optional materials of construction making it a versatile solution to your demanding valve requirements.
Minimum Data Requirements to Size 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 injection. 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, 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.
Minimum Data Requirements to Size Valve
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 materials that otherwise would not be suitable for the service temperature conditions.
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 Requirements to Size Valve
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 Teflon, braided or Graphite/Grafoil packing.
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 divert the flow from one outlet to the other as required to bypass heat exchangers, coolers, filters or other pieces of process equipment. The Mark 8000T is a heavy-duty pneumatic control valve developed for standard or low flow industrial process applications. It is recommended for use when service or environmental conditions may be too harsh for traditional three-way control valves.
Minimum Data Requirements to Size Valve
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 detectors, as well as other industrial controls.
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 of applications and environments. These valves are designed to regulate a variety of gases and liquids from pump and compressor control to process pressure control where high flows and low pressures are required.
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 environments. These valves are designed to regulate a variety of gases and liquids from pump and compressor control to process pressure control where high flows and high pressures are required.
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 ionization detectors, as well as other industrial controls.