Mechanical Installation
ON
1 2 3 4 5 6 7 8
CW
SPAN ZERO
White
4…20 mA Input
Black
– 4…20 mA Input
Figure 14: Integral configuration for rate/totalizer indicator
MECHANICAL INSTALLATION
RVL Inline Installation
For proper installation, follow these guidelines:
• Install the meter where pipe vibration is minimal
• Use the upstream and downstream piping requirements shown in
“Piping Requirements” on page 6
• Do not use upstream valves to control flow rate Always keep upstream valves fully open
• Connect good quality ball valves with integral unions directly to the flow meter if the valves are fully open during operation for easy isolation and removal of the flow meter Cavitation and flow rate pulsation adversely affects the flow meter performance
• Do not use diaphragm or piston pumps
• Do not use Teflon tape or any kind of pipe dope when piping
• Handle the meter with care
• Do not use excessive force Screw mating fittings (FNPT) and flanges into the meter hand-tight; then tighten an additional
1/2…3/4 turn
• Always use two wrenches when turning the flow meter into a fitting; one across the flats on the flow meter end, close to the fitting, and one on the fitting
• Do not use tools inside the flow meter, as this may damage the vortex sensor, and void the warranty
The flow meter may be mounted in any orientation Three holes, tapped 1/4-20 UNC-2B, 0 375 in -deep, on 3/4 in centers are provided on the 3/4 in and smaller flow meters Use these holes to provide support for the flow meter if pipe supports are not practical
Page 14 VRX-UM-00371-EN-02 August 2015
Mechanical Installation
RVL Wafer Installation
The RVL Wafer series transmitters are designed with wafer style flow bodies, that mount easily between standard ANSI style pipe flanges
For proper installation, follow these guidelines:
• Install the meter where pipe vibration is minimal
• Use the upstream and downstream piping requirements shown in
“Piping Requirements” on page 6
• Do not use upstream valves to control flow rate Always keep upstream valves fully open
• Connect good quality ball valves with integral unions directly to the flow meter if the valves are fully open during operation for easy isolation and removal of the flow meter Cavitation and flow rate pulsation adversely affects the flow meter performance
• Do not use diaphragm or piston pumps
• Do not use Teflon tape or any kind of pipe dope when piping
• Do not allow gaskets to protrude into the flow stream on flanged meters
Flange Size
1/2…1-1/2 in
2…3 in
Recommended Torque
10…15 ft Ibs
20…30 ft Ibs
Table 3: Torque rating
Follow these steps for proper installation and operation:
1 Space flanges to accommodate the width of the flow body See
“RVL Wafer” on page 21
for dimensions
2 Align the flow body centered with respect to flanges and gaskets, insert threaded rods, retaining nuts and lock washers
3 Install all retaining nuts hand-tight, and then uniformly tighten the nuts in an alternating sequence, diametrically opposed
to each other Uniform stress across the flange prevents leakage at the gasket Torque ratings are listed in
Table 3
4 Use grounding rings when metal pipes are used in conjunction with this meter See
Figure 15
August 2015
Grounding
Rings
Figure 15: Grounding ring installation
VRX-UM-00371-EN-02 Page 15