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.Features
- 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.
- The spring-loaded packing maintains a proper compression, while minimizing excessive friction. This alleviates the need for most field adjusting. The TFE packing is suitable for temperatures to 450°F (232°C), while braided or Graphite/Grafoil may be used for higher temperature requirements.
- The bolting provides solid construction and secure connection. This bolting adds ease to maintenance, as bonnet/actuator assembly may be removed from the valve body in-line.