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  Mark 708 Series


Mark 708

The Mark 708 provides 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, the Mark 708 offers design features that will provide enhanced performance to insure precision control on your most critical micro-flow applications.

Features & Benefits




CRN Registration Number Available
Rolling diaphragm - the rolling diaphragm design ensures that the effective diaphragm area remains relatively constant, regardless of valve stem position
Spring-loaded TFE/Chevron packing - the spring-loaded packing maintains a proper compression, while minimizing excessive friction
Bolted body/bonnet connection - the bolting provides solid construction and secure connection
Guided trim - extended orifice and plug guiding are standard and offers improved shutoff and accuracy equivalent to heavy duty trim option of competitors
Quick change trim - the secondary stem connection eliminates stroke adjustment when changing trim facilitating faster, easier trim changes