Replacement Parts

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HYDRONIC SOLUTIONS CATALOG
ORIFICE INDICATORS | SUBMITTAL
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ma ximum pump oper ating cond itions
250 psi at 250°f (1724 kPa at 121°c)
When sizing an Armstrong Venturi, model apo, for a given pipe
size, locate the operating gpm on the performance curve. Select the
apo with a pressure drop (P) as near to, but always above 10".
Example: 120 gpm on 4" pipe sizes available.
4"- 804 w/6.75"P
4"- 712 w/13"P- preferred choice
4"- 619 w/31"P
Use Armstrong Indicators for measuring flow conditions to obtain
proper distribution and balance throughout all sections of a
hydronic system.
Each unit includes a set of V" nipples, and disconnects. All models
greater than 1" are equipped with isolation valves.
All dimensions in inches.
Construction: ½" to 2"= Brass npt connectors
2½" to 10"= Zinc plate steel, for flange sandwich or socket weld.
mounting orientation
apo - 2½" to apo - 24"
sizing information
general information
part numbers
red
green
flow
*2
**4
*5
**10"
minimum pipe diameters from fitting or valve
*½"−4" *5" and up
apo - 2½" to apo- 24"
¾"
disconnect
met
al identification
tag
valve
model a part number
APO 2½-708 ¾ 570132-000
APO 3-653 ¾ 570132-001
APO 4-619 ¾ 570132-002
APO 2½-810 ¾ 570132-003
APO 3-734 ¾ 570132-004
APO 3-794 ¾ 570132-005
APO 4-712 ¾ 570132-006
APO 4-804 ¾ 570132-007
model a part number
APO 5-750 ¾ 570132-008
APO 6-750 ¾ 570132-009
APO 8-800 ¾ 570132-010
APO 10-775 ¾ 570132-011
APO 12-792 ¾ 570132-012
APO 14-800 ¾ 570132-013
APO 16-800 ¾ 570132-014
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