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. Pilot plant installations Test stands R & D facilities Processing plants Specialized processing plants (dosing, injection and venting)

Rolling diaphragm design ensures that the effective diaphragm area remains relatively constant, regardless of valve stem position Spring-loaded TFE-Chevron packing maintains a proper compression while minimizing excessive friction Bolted body/bonnet connection Guide trim – extended orifice and plug guiding are standard and offers improved shutoff and accuracy equivalent to heavy duty trim options of competitors Quick change trim

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.

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.

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.

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.

High Pressure / Low Flow Pressure Regulating Valves 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. Research and sampling systems General, corrosive and specialty gas and liquid services (non-cavitating)

Diaphragm Operated, Pressure Regulating Valve 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. High pressure gas Liquid pump systems control Water seal regulation Hyperbaric chambers Air compressors Pressurized ballast tanks Gas transfer systems Gas chromatography Flame ionization

Very High Pressure / Low Flow Pressure Regulator 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. Research and sampling systems General, corrosive and specialty gas and liquid service

High Flow Pressure Regulating Valves 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. Gas and liquid applications where high flows and low control pressures are required.

Low Set Pressure / Very Low Flow Pressure Regulating Valves The JRHL Series is a line of low flow pressure regulators that have the ability to handle low set pressures and very low flows with less offset than valves with small diaphragm. The durable valve body and metal trim components are machined from 316L SST barstock. The valve is outfitted with the rugged Jorlon diaphragm and Teflon, PEEK or EPDM seats for ANSI Class VI shutoff. USDA and FDA approved soft goods available upon request.