Inline Flow Sights - Low Pressure

Compact design inline flow sights may be used in either horizontal or vertical pipe runs to indicate flow. May also be used to check clarity of fluid. Machined from solid brass bar stock with large sight windows.

For higher pressures and modifications see F150 series on bulletin F447-1A.

Caution: Scratched glass significantly reduces pressure rating.

STANDARD MATERIALS:
  • Brass Construction
  • Buna N Seals
  • Borosilicate sight
OPERATING CONDITIONS:
  • Maximum working pressure up to 50 PSI (345 kPa) at 70°F (21.1°C)
  • Maximum working temperature up to 200°F (93.3°C)
  • No Corrosion

LDI_Dwg_Inline Flow Sight


 

MACHINED FROM SOLID BRASS BAR STOCK
CATALOG
NUMBER-
FEM X FEM
CATALOG
NUMBER-
FEM X MALE
PIPE
THREAD
HEX. FLATS
INCHES
(mm)
A
INCHES
(mm)
B
INCHES
(mm)
C
INCHES
(mm)
D
INCHES
(mm)
F52 F62 1/4-18 0.81
(20.57)
2.41
(61.21)
0.66
(16.76)
1.06
(26.92)
2.91
(73.91)
F53 - 3/8-18 1.12
(28.45)
2.38
(60.45)
0.69
(17.53)
1.12
(28.45)
2.88
(73.15)
F56 - 1-11 1/2 2.50
(63.50)
3.50
(88.90)
0.88
(22.35)
1.75
(44.45)
4.31
(109.47)
F57 - 1 1/4-11 1/2 2.50
(63.50)
3.50
(88.90)
0.88
(22.35)
1.75
(44.45)
4.34
(110.24)

 

 

Inline Flow Sights - High Pressure

Inline flow sights can be used in either vertical or horizontal fluid lines to observe fluid flow, clarity or condition of medium. A ball float can be supplied to aid observation of flow of dark fluids or fluids in dimly lit conditions. Add -01 (nylon ball) after catalog number.

Modifications of body, seals, and ball material can be requested as made to order. Minimum order quantity may apply. Please specify.

Caution: Scratched glass significantly reduces pressure rating.

STANDARD FEATURES:
  • Brass construction
  • Buna N Seals
  • Borosilicate sight
OPERATING CONDITIONS:
  • Maximum working temperature up to 180°F (82.2°C). For applications requiring maximum working temperature over 180°F (82.2°C), please consult factory.

 

LDI_Dwg_Inline Flow Sight-High Press

  

MACHINED FROM SOLID BRASS BAR STOCK
CATALOG NUMBER-
FEM X FEM
CATALOG NUMBER-
FEM X MALE
PIPE THREAD HEX. FLATS ORIFICE DIAMETER W/O BALL A INCHES
(mm)
B INCHES
(mm)
C INCHES
(mm)
D INCHES
(mm)
MAX. WORK. PSI (kPa)@
150°F (65.6°C
F151 - 1/8-27 0.88
(22.35)
0.234
(5.94)
3.34
(84.84)
0.78
(19.81)
1.04
(26.42)
3.66
(92.96)
435
(2999)
F152 F162 1/4-18 0.88
(22.35)
0.234
(5.94)
3.56
(90.42)
1.00
(25.40)
1.04
(26.42)
4.00
(101.60)
435
(2999)
F153 F163 3/8-18 1.06
(26.92)
0.312
(7.92)
4.25
(107.95)
1.12
(28.45)
1.12
(28.45)
4.75
(120.65)
425
(2930)
F154 - 1/2-14 1.25
(31.75)
0.375
(9.52)
4.62
(117.35
1.25
(31.75)
1.30
(33.02)
5.12
(130.05)
380
(2620)
F155 - 3/4-14 1.38
(35.05
0.500
(12.70)
5.25
(133.35)
1.35
(34.29)
1.36
(34.54)
5.41
(137.41)
345
(2379)
F156 - 1-11 1/2 1.62
(41.15)
0.531
(13.49)
6.31
(160.27)
1.69
(42.93)
1.48
(37.59)
6.31
(160.27)
270
(1862)

 

 

Wide View Flow Sights
Female x Female NPTF

Wide view flow sights can be used in either vertical or horizontal pipe runs to observe fluid flow and clarity. Large cylindrical sight allows 360° viewing and flow is readily seen from a distance, in elevated or dimly lighted conditions. In vertical pipe run, fluid flow should come in from bottom to note ball action as a flow indicator. The ball stop slightly restricts fluid flow.

Caution: Scratched glass significantly reduces pressure rating.

STANDARD CONSTRUCTION:
  • Brass Construction
  • Borosilicate Sight
  • Buna N seals
  • Nylon Indicator Ball
OPERATING CONDITIONS:
  • Noted below in chart

LDI_Dwg_Wide View Flow Sight

 

MODIFICATIONS AVAILABLE MADE TO ORDER - CONSULT OUR FACTORY
(MINIMUM ORDER MAY BE REQUIRED)
CATALOG
NUMBER
A
FEMALE
NPTF
B
INCHES
(mm)
C
INCHES
(mm)
D
INCHES
(mm)
E
INCHES
(mm)
MAX. WORK.
PSI (kPa) @
TEMP. SHOWN
PSI
(kPa)
°F
(°C)
F301-04-01 1/2-14 1.75
(44.45)
2.00
(50.80)
1.44
(36.58)
4.25
(107.95)
130
(896.4)
212
(100.0)
F301-05-01 3/4-14 1.75
(44.45)
2.00
(50.80)
1.44
(36.58)
4.25
(107.95)
130
(896.4)
212
(100.0)
F301-06-01 1-11 1/2 1.75
(44.45)
2.25
(57.15)
1.75
(44.45)
4.88
(123.95)
130
(896.4)
212
(100.0)
F301-07-01 1 1/4-11 1/2 2.50
(63.50)
3.00
(76.20)
1.75
(44.45)
5.62
(142.75)
100
(689.5)
185
(85.0)
F301-08-01 1 1/2-11 1/2 2.50
(63.50)
3.00
(76.20)
1.88
(47.75)
5.88
(149.35)
100
(689.5)
185
(85.0)
F301-09-01 2-11 1/2 3.50
(88.90)
4.00
(101.60)
1.88
(47.75)
7.50
(190.50)
60
(413.7)
150
(65.6)

 

 

Flow Sights -  Inline Pipe Thread for Pressure

Inline double window flow sights can be used to determine flow, clarity of fluid and impurities in either horizontal or vertical pipe runs. Nylon ball flow indicator gives positive flow indication with dark or opaque fluids.

CAUTION: Scratched glass significantly reduces pressure rating.

STANDARD MATERIALS:
  • Brass body
  • Tempered borosilicate sight window
  • Buna N seals
OPERATING CONDITIONS:
  • Maximum working temperature up to 180°F (82.2°C). For applications requiring maximum working temperature over 180°F (82.2°C), please consult factory.

LDI_Dwg_Flow Sights - Inline Pipe Thread for Press

 

CATALOG
NUMBER
A
FEMALE
NPTF
B
INCHES
(mm)
C
INCHES
(mm
D
INCHES
(mm
E
INCHES
(mm)
MAX.
WORKING
PSi @ 150°F
kPa @ 65.6°C)
NO BALL BALL
- F251-04-01 1/2-14 2.00
(50.80)
0.88
(22.35)
1.75
(44.45)
3.50
(88.90)
400
(2758)
- F251-05-01 3/4-14 2.25
(57.15)
0.88
(22.35)
1.75
(44.45)
3.50
(88.90)
400
(2758)
- F251-06-01 1-11 1/2 2.50
(63.50)
1.38
(35.05)
2.31
(58.67)
4.62
(117.35)
160
(1103.2)
F251-08 F251-08-01 1 1/2-11 1/2 3.00
(76.20)
1.88
(47.75)
2.88
(73.15)
5.75
(146.05)
85
(586.1)