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 Low Flow Control Valves > Mark 708 Series



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 usage in processes such as dosing, injection and venting applications.

With Cv's ranging from 0.00001 to 4.0 available in the 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 flow applications.

Features & Benefits




Rolling diaphragm – The rolling diaphragm design ensures that the effective diaphragm area remains relatively constant, regardless of valve stem position. This increases accuracy of the actuator when positioning the valve by ensuring a linear response to input signal changes.
Spring-loaded TFE/Chevron packing – The spring leaded packing maintains a proper compressions, while minimizing excessive friction. THis alleviates the need for most field adjusting.
Bolted Body/Bonnet Connection – The bolting provides solid construction and secure connection. This bolting adds ease to maintenance, as bonnet/actuator assembly may be removed with the valve body in-line.
Guided Trim – Extended orifice and plug guiding are standard and offers improved shutoff and accuracy equivalent to heavy duty trim option of competitors.