Instruction manual

74
Rotary Gauges
Fisher
®
brand rotary gauges can be used on stationary or mobile
tanks to visually indicate the amount of LP-Gas or Anhydrous
Ammonia (NH
3
) in the container. They are also used in fi lling the
tank to the proper liquid level. On mobile applications and some
large stationary storage tanks, hangers are recommended to support
the horizontal length of the dip tube.
The gauge is operated by opening the small bleed orifi ce when the
tube is in the vapor space of the tank. Moving the pointer on the
dial causes the end of the tube to move until it contacts liquid in
the container. At that point, discharge from the bleed orifi ce turns
from vapor to liquid and the rotary gauge dial gives the volume
percentage of liquid in the tank.
J31 Series – consists of heavy duty gauges that minimize vibration
effects (swaying, bouncing) by a long (68 inches / 1.73 meters)
stem tube extension. Gauges fi t 1-inch / 25.4 mm coupling
container connections.
All gauges have stem and dip tubes with an extra large inside diameter.
This assures that the correct liquid level can be obtained quickly.
A nylon packing sleeve and a friction ring for the pointer indicator
gives smooth rotation and long service life. Steel and stainless steel
materials resist rust or corrosion. Standard product temperature
rating is -20 to 160°F / -29 to 71°C.
Rotary Gauges
LENGTH,
INCHES / mm
LPG DIAL
>1200
GALLON
LPG DIAL
≤1200
GALLON
NH
3
DIAL
>1200
GALLON
NO DIAL
>1200
GALLON
68 / 1727 Type J31L-1 Type J31S-1 Type J31A-1 Type J31X-1
69 to 92 /
1753 to 2337
Type J31L-2 Type J31S-2 Type J31A-2 Type J31X-2
93 to 108 /
2362 to 2743
Type J31L-3 Type J31S-3 Type J31A-3 - - - -
109 to 140 /
2769 to 3556
Type J31L-3L Type J31S-3L Type J31A-3L Type J31X-3L
Dial Only Type P323 Type P322 Type P324 - - - -
Liquid Level Vent Valves
Type J415 – with steel construction, can be used on either LP-Gas
or Anhydrous Ammonia (NH
3
) service. They can also be installed
on large bulk storage tanks at the maximum fi lling level. Standard
valve comes with a 3/4-inch MNPT container connection and two
1/4-inch FNPT side outlets. Standard product temperature rating is
-20 to 160°F / -29 to 71°C.
Type J415-1 – features the addition of a Type J402S liquid level
vent valve and Type J542 (0 to 400 psig / 0 to 27.6 bar) pressure
gauge installed.
Vent Valves and Fixed Maximum Liquid
Level Gauges
Used in all kinds of LP-Gas containers to give positive visual indication
of liquid reaching the maximum allowable liquid level. Standard product
temperature rating is -20 to 160°F / -29 to 71°C.
Types J402S and J403S do not have dip tubes and must be used
in containers where a dip tube has been welded in. Stainless steel
constructions are for corrosive service.
Container Thermometers
Suitable for any size tank in LP-Gas and Anhydrous Ammonia (NH
3
)
service, the 2-inch / 51 mm diameter dial reads from -40 to 120°F /
-40 to 49°C. They are dustproof and waterproof. Specify J700 Series
for a 1/2-inch MNPT by a 4-inch / 102 mm length or Type J701 for a
1/2-inch MNPT by 6-inch / 152 mm length.
LIQUID LEVEL INDICATORS
TYPE J415TYPE J415-1
J700 SERIES OR
TYPE J701
J31 SERIES
TYPE J402S TYPE J403S