7710 Series - Stainless Steel
This all 316L stainless steel meter utilizes a float and tapered tube (rotameter) design which offers longer, more linear scales,
better pointer stability and 40% greater accuracy than competitively priced products. A 4-20mA transmitter option adds to its versatility.

Description
Metering Tube
316L Stainless Steel
Internal Components
316L Stainless Steel
Inlet/Outlet Fittings
316L Stainless Steel NPT
or Flange, Vertical
Fitting Material
316L Stainless Steel
316L Stainless Steel NPT or Flange, Vertical
Elastomers
Standard: Viton®
Optional: Buna N, EPR, and Kalrez®
Indicator Housing
304 Stainless Steel
Options
Alarm
Single or Dual, Inductive Slot Sensor
4-20 mA Transmitter
Certified Calibrations
Conform to ISA RP 16.6
Scales
Can be produced in any volumetric unit
Liquid Compatible
Gas Compatible
Alarm Compatible
7710 Series Stainless Steel Tube Rotameters
Performance
Capacities
33 GPH to 450 GPM — Water
4 to 100 SCFM — Air
Scale
120 mm Direct reading, detachable
Accuracy
± 3% of Full Scale Flow
Turndown
10:1 to12.5:1 unless otherwise indicated
Repeatability 1%
Max Temperature
O-ring Material
Max Temperature
EPR
225° F (107° C)
Buna-N
275° F (135° C)
Viton®
350° F (177° C)
Kalrez®
400° F (204° C)
Max Pressure
NPT Fittings — 1500 psi
Stainless Steel Flange Class
Temp °F
150#
300#
600#
200
225 psi
600 psi
1,200 psi
300
200 psi
540 psi
1,100 psi
400
180 psi
515 psi
1,000 psi
Ambient Temperature
33° F to 125° F (1° C to 52° C)
Materials Of Construction
Part
Standard
 Optional
Meter Tube 316L SS –
Guide Rod 316L SS –
Fittings 316L SS –
Flanges 316L SS –
Float 316L SS Hastelloy® C-276
O-Rings Viton®, EPR, Buna-N Kalrez®
Float Stops 316L SS Hastelloy® C-276
Indicator Housing Powder Coated Aluminum –
Housing Cover Machined Cast Acrylic –

Mounting Bracket
A mounting bracket is available for 7700 Series meters, order numbers 706 thru 714. This 304 Stainless Steel bracket can greatly reduce installation time. Please call the factory for details about this low cost option.


Specifications
 
Dimensions (Inches)
Order
Number		 Full Scale
Flow-Water		  
Dimensions (Inches) With FNPT Connections
150 # Flange
300 #  Flange
FNPT
A
B
C
D
E
F
G
H
G
H
706
33.0 GPH - 1/2" FNPT
0.5
1.312
11
5.125
5
3.375
4.625
3.5
13.125
3.75
13.625
708
1.1 GPM - 1/2" FNPT
0.5
1.312
11
5.125
5
3.375
4.625
3.5
13.125
3.75
13.625
710
2.0 GPM - 1/2" FNPT
0.5
1.312
11
5.125
5
3.375
4.625
3.5
13.125
3.75
13.625
712
4.0 GPM - 1/2" FNPT
0.5
1.312
11
5.125
5
3.375
4.625
3.5
13.125
3.75
13.625
714
6.0 GPM - 1/2" FNPT
0.5
1.312
11
5.125
5
3.375
4.625
3.5
13.125
3.75
13.625
716
5.0 GPM - 1" FNPT
1
1.875
13.25
5.25
5
4
4.625
4.25
16.75
4.88
17.5
718
10.0 GPM - 1" FNPT
1
1.875
13.25
5.25
5
4
4.625
4.25
16.75
4.88
17.5
720
16.5 GPM - 1" FNPT
1
1.875
13.25
5.25
5
4
4.625
4.25
16.75
4.88
17.5
722
25.0 GPM - 1" FNPT
1
1.875
13.25
5.25
5
4
4.625
4.25
16.75
4.88
17.5
724
35.0 GPM - 1 1/2" FNPT
1.5
2.375
13.875
5.625
5
4.5
4.625
5
18.625
6.12
19.25
726
60.0 GPM - 1 1/2" FNPT
1.5
2.375
13.875
5.625
5
4.5
4.625
5
18.625
6.12
19.25
728
76.0 GPM - 2" FNPT
2
3.5
13.875
6.75
5
5.625
4.625
6
17.156
6.5
17.75
730
100.0 GPM - 2" FNPT
2
3.5
13.875
6.75
5
5.625
4.625
6
17.156
6.5
17.75
732
120.0 GPM - 2" FNPT
2
3.5
13.875
6.75
5
5.625
4.625
6
17.156
6.5
17.75
734
152.0 GPM - 2" FNPT
2
3.5
13.875
6.75
5
5.625
4.625
6
17.156
6.5
17.75
736
150.0 GPM - 3" Flange
–
–
–
–
–
–
–
7.5
17.867
8.25
18.187
738
225.0 GPM - 3" Flange
–
–
–
–
–
–
–
7.5
17.867
8.25
18.187
740
300.0 GPM - 4" Flange
–
–
–
–
–
–
–
9
18.562
10
19.75
742
375.0 GPM - 4" Flange
–
–
–
–
–
–
–
9
18.562
10
19.75
744
450.0 GPM - 4" Flange
–
–
–
–
–
–
–
9
18.562
10
19.75
 
Dimensions (Inches) With FLANGE Connections
Order
Number
Full Scale
  
Dimensions (Inches) With NPT Connections
ANSI Class 150 #
ANSI Class 300 #
Flow-Air
FNPT
A
B
C
D
E
F
G
H
I
J
707
4.0 SCFM - 1/2" FNPT
0.5
1.312
11
5.125
5
3.375
4.625
3.5
13.125
3.75
13.625
709
8.0 SCFM - 1/2" FNPT
0.5
1.312
11
5.125
5
3.375
4.625
3.5
13.125
3.75
13.625
711
16.5 SCFM - 1/2" FNPT
0.5
1.312
11
5.125
5
3.375
4.625
3.5
13.125
3.75
13.625
713
24 SCFM - 1/2" FNPT
0.5
1.312
11
5.125
5
3.375
4.625
3.5
13.125
3.75
13.625
715
20 SCFM - 1" FNPT
1
1.875
13.25
5.25
5
4
4.625
4.25
16.75
4.88
17.5
717
42 SCFM - 1" FNPT
1
1.875
13.25
5.25
5
4
4.625
4.25
16.75
4.88
17.5
719
76 SCFM - 1" FNPT
1
1.875
13.25
5.25
5
4
4.625
4.25
16.75
4.88
17.5
721
100 SCFM - 1" FNPT
1
1.875
13.25
5.25
5
4
4.625
4.25
16.75
4.88
17.5

 
Alarm Options:
Inductive Slot Sensor
Like inductive ring sensors, slot sensors are 2-wire, DC, low-current devices and are designed to be used with a remote intrinsic safety barrier/switch isolator. Single or dual slot sensors are available for the 7700 Series.		 Sensor Specifications
Power Supply: 5-25 VDC
(from Switch Isolator)
Max Current, Target Present: 1 mA
Max Current, Target Absent: 15 mA
Temperature Limits: -14°F to +212°F
Output: NAMUR
Repeatability: 0.01 mm
Switching Frequency: 2 kHz
Sensor Approvals*:
UL Listed: General Purpose
FM Approved: Intrinsically Safe*
CSA Certified: Intrinsically Safe*
Cenelec: Intrinsically Safe*		 Power Supply:
12 to 33 Vdc
Maximum Current Consump.: 40 mA
Temperature Limits: -13° F to 158° F (-25 to 70° C)
Output: 4 to 20 mAdc
Accuracy: <0.5%
Linearity: +0.4%
Influence from bearing play: ±0.1%
Temperature influence (amb): 0.03% per °C
Power supply influence: ±0.1%
Load resistance influence: ±0.1% at R max.
*Specifications shown here are for the transmitter only and should not be confused with the actual performance capabilities of the flowmeter.

Ordering:
Use the following guide to determine the specific product number you require.
7
7
1
 
2
 
 
     
Meter Connection Type Float Material O-Ring Material Optional Alarm/Transmitter Order Number
Series NPT Connections - 1 316L SS - 2 EPR - 1 Without Alarm/Transmitter - 0 See Specifications
150# R.F. Flanged - 2   Buna-N - 2 With Transmitter - T Table
300# R.F. Flanged - 3 Viton® - 3 One Alarm (Inductive Slot Sensor) - A
*600# R.F. Flanged - 4 Kalrez® - 4 Two Alarms (Inductive Slot Sensors) - D
 
 
  *Call Factory for 600# R.F. Flange availability  
  Example: 771 - 1 - 2 - 1 - T - 716
Download Product Specifications in PDF Format