Badger Meter High Temperature Fluid Meter - Manual (Page 6)

OPERATING PRINCIPLE
The Flow Meter is a variable area instrument . A sharp-edged Orifice, located within the Piston Assembly, forms an
annular opening with the contoured Metering Cone . The piston assembly carries a cylindrical PPS/Ceramic Magnet that
is magnetically coupled to an external Indicating Magnet which moves precisely in direct response to movement of the
piston . A calibrated Spring opposes flow in the forward direction .
The Hedland variable area flow meters are the most readable products in their class . Brightly colored indicators move over the
graduated, linear Flow Scale which contains bold, easy to read numeral and gauge marks . The enhanced resolution virtually
eliminates parallax problems associated with competitive, direct reading flow meters .
16
1
2
3
11
4
5
6
7
8
9
10
12
13
14
15
FLO
W
1 Orifice 9 Spider Plate
2 Piston Assembly 10 Retaining Spring
3 Metering Cone 11 Pressure Seal
4 Internal Magnet 12 End Fitting
5 Flow Indicator 13 End Cap
6 Spring 14 Body
7 Flow Scale 15 Guard
8 Retaining Ring 16 Guard Seal/Bumper
Table 1: Meter components
SPECIFICATIONS
Temperature Range
• Standard: –20…240° F (–29…116° C)
• High temperature and hostile environment
◊ –20…400° F (–29…205° C) continuous
◊ 400…500° F (205…260° C) intermittent
• See "Flow vs Pressure Drop*" on page 18
Pressure Rating (3:1 safety factor)
• Aluminum/brass models: 3500 psi (241 bar) maximum
• Stainless steel models:
◊ 1/4" & 1/2" sizes: 6000 psi (414 bar) maximum
◊ 3/4" thru 1-1/2" sizes: 5000 psi (345 bar) maximum
Pressure Drop
• See "Application Information" on page 16 for specific
meter information
Accuracy
• ±2% of full scale
Repeatability
• ±1%
Threads
• SAE J1926/1, NPTF ANSI B2 .2, BSPP ISO1179, Code 61
and Code 62: SAEJ518
Test Kit Pressure Gauge, Glycerin Dampened
• Aluminum/brass models: 0…3500 psi (0…240 bar)
• Stainless steel models: 0…6000 psi (0…400 bar)
Test Kit Load Valve
• 1/2", 3/4" and 1" sizes: needle valve
• 1-1/4" and 1-1/2" sizes: ball valve
• Produce ΔP up to 3500 psi (241 bar) PSID and 6000 psi
(414 bar) PSID
Dimensions
• See "Dimensions" on page 22
Inline Liquid Flow Meter
Page 6 November 2013