Figure 3 Figure 3 Pressure Drop Characteristics for HO Series on Liquid Service Pressure Drop Char acteristics for HO Series on Liquid Service

P(e) = equilibrium vapor pressure of the liquid at the operating temperature in PSIA Pressure Drop: See Figure 3 for pressure drop across the meters and the side-bar note for calculating pressure drop at viscosities other than 1 cstk. Materials of Construction: The materials of construction selection for a turbine meter usually are based upon chemical compatibility between the flowing liquid and wetted components of the meter. In the case of Hoffer turbine flowmeters, the wetted components include the meter body and the internals of the meter (internal flow straighteners, shaft, lock nuts or clips, rotor and bearings). For flanged flow meters, Hoffer employs a special manufacturing technique that prevents the flanges from coming into direct contact with the flowing liquid. Material selection for the flanges is at the discretion of the customer and/or compatibility with any external atmosphere or environmental conditions. The normal materials of construction for the meter bodies, flanges and internals are summarized in Table 3 . Hoffer also offers custom materials of construction to meet specific requirements. For special material requirements, consult factory.

Table 3 Materials of Construction for Hoffer Turbine Flowmeters

Component: All Inline Turbine Meter Series Except Teflon® Teflon® Series Body: 316/316L Dual Rated Standard 316/316L Dual Rated, Non-Wetted Shell with PTFE Liner Flanges: Carbon Steel , 316/316L Dual Rated 316/316L Dual Rated with PTFE Flange Faces Internals (Except bearings & Rotors) 316/316L Standard PTFE. Shaft is a PTFE/PEEK (Poly-Ether-Ether-Ketone) Blend. For liquids not compatible with PEEK, consult factory. Rotors: 17.4-PH (Standard), Nickel 200, 430 SS PTFE Bearings: Hybrid Ceramic, Self-Lubricated Ball bearing Type with 440C Races & Shields, Hard Carbon Composite Sleeve & Journal Type or Tungsten Sleeve & Journal Type PTFE/PEEK (Poly-Ether-Ether-Ketone) Blend. For liquids not compatible with PEEK, consult factory

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Teflon is a registered trademark of E.I. Dupont de Nemours and Company, Inc. 4