Table 1 Liquid Size Selector Chart for Standard HO Series Turbine flowmeters

Flowmeter Size MAGNETIC PICKUP COIL MODULATED PICKUP COIL Diameter (inches) Linear Range (US GPM) Linear Range (LPM) Repeatable Range (US GPM) Repeatable Range (LPM) Linear Range (US GPM) Linear Range (LPM) Repeatable Range (US GPM) Repeatable Range (LPM) 1/4* .35-3.5 1.3-13.2 .25-4.5 .95-17 .35-3.5 1.3-13.2 .0625-4.5 .24-17 3/8* .75-7.5 2.8-28.4 .3-9 1.1-34 .75-7.5 2.8-28.4 .075-9 .28-34 1/2 1.25-9.5 4.7-36 .6-12 2.3-45 1.25-9.5 4.7-36 .12-12 .45-45 5/8 1.75-16 6.6-60.6 .9-20 3.4-75.7 1.75-16 6.6-60.6 .2-20 .75-75.7 3/4 2.5-29 9.5-110 1.5-35 5.7-132.5 2.5-29 9.5-110 .35-35 1.3-132.5 1 4-60 15-227 2-75 7.6-284 4-60 15-227 .75-75 2.8-284 1-1/4 6-93 23-352 3-115 11.4-435 6-93 23-352 1.15-115 4.35-435 1-1/2 8-130 30.3-492 5-175 19-662 8-130 30.3-492 1.75-175 6.6-662 2 15-225 56.8-852 11-275 42-1041 15-225 56.8-852 2.75-275 10.4-1041 2-1/2 25-400 95-1514 15-500 56.8-1893 25-400 95-1514 5-500 19-1893 3 40-650 151-2460 20-800 76-3028 40-650 151-2460 8-800 30.3-3028 4 75-1250 284-4731 50-1500 189-5678 5 140-2000 530-7570 100-2500 379-9463 6 200-2900 757-10977 125-3600 8 330-5200 1249-19682 270-6400

Table 2 . A typical installation schematic for a uni-directional turbine flowmeter is shown in

473-13626 1022-24224 MCP not recommended in 4” and larger sizes 10 650-8000 2460-30280 540-9800 2044-37093 12 1400-12000

Figure 2

5299-45420

. The bypass flow loop shown in Figure 2 is optional but provides a convenient method for removing the meter from the line for servicing without the necessity of shutting down the flow. For liquid service, it is recommended that the turbine meter and straight run sections be installed in a horizontal plane relative to ground level. They may also be installed in a vertical or slanted line with the flow direction being up through the flow meter. Vertical or slanted downflow installations are not recommended due to the difficulty in maintaining the line full of liquid and the probability of accelerating bearing wear. Turbine flowmeters should always be installed in positive pressure lines and will not perform well under vacuum flow conditions. Adequate back pressure is required downstream of the flowmeter in order to assure that the flowmeter will remain completely full of liquid during measurement operations and to prevent fluid cavitation. Normally a minimum back pressure of 5 to 10 PSIG is sufficient to prevent cavitation. For more volatile, low density liquids such as hydrocarbon based liquids, the minimum required back pressure can be calculated as follows: P(b) = (2 x P) + (1.25 x P(e)) Where: P(b) = minimum required back pressure in PSIG P = pressure drop through the turbine flow meter at the maximum flow rate for the liquid being measured in PSIG

800-15000 3028-56775
NOTE: Performance enhancement techniques are routinely applied to produce larger linear and usable flow ranges. Consult with the applications group at Hoffer with your requirements.

for-trade, a flow straightening tube bundle in the upstream section is normally required to eliminate any rotation of the flow stream about its axis of flow. Hoffer offers a complete line of installation kits and flanged flow straightening sections that provide the required straight runs of piping in and out of the flowmeters as an option and meet API and AGA design criteria for custody transfer applications as well. Consult factory with your specific requirements. A strainer is generally recommended for installation upstream of the straight run section in order to prevent debris from entering into or damaging the flowmeter. Specific maximum particle sizes and recommended strainer sizes for each size of turbine meter are given in

Figure 2 Figure 2 Typical Flowmeter Installation Typical Flowmeter Installation Table 2 Table 2 Recommended Strainer Sizes Recommended Strainer Sizes

Meter Size Mesh Size Particle Size Maximum (inches) Mini-Flow Series 100 .0055 1/4" to 1/2" 100 .0055 5/8" to 1-1/4 80 .007 1-1/2 to 3" 40 .015 4 " to 12" 20 .031

3