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50 Hanover Road, Florham Park, New Jersey 07932 www.ascovalve.com
I&M No.V7538
Torque Chart
Part Name Torque Value Inch-Pounds Torque Value Newton-Meters
solenoid base sub-assembly 175 ± 25 19,8 ± 2,8
end cap 60± 10 6,8± 1,1
retaining screw (manual operator) 25± 5 2,8± 0,6
4-40 machine screw
serves as a self-tapping
screw to remove insert
from body. Remove screw
from insert before reassembly.
solenoid base
sub-assembly
core spring
core assembly
body gasket
upper insert gasket
insert
middle insert gasket
lower insert gasket
disc holder assembly
disc spring
valve body
end cap
end cap gasket
guide gasket
stem gasket
outer piston gasket
inner piston gasket
piston assembly
MANUAL OPERATOR
Suffix MO"
valve body
guide
retaining screw (2)
stem/knob/retainer
sub-assembly
Figure 1. Series 8321
Indicates Parts Supplied
In ASCO Rebuild Kits
PILOT ORIFICE
DO NOT DAMAGE
CAUTION
Notes:
1. Middle and lower insert gaskets have the same physical
dimensions. However, the lower insert gasket is made of a softer material.
2. Upper and middle insert gaskets snap into grooves of insert. Lower
insert gasket fits between recess in lower corner of insert and lower
corner of body pilot insert bore.
MANUAL OPERATOR
Suffix MS"
retaining screw (2)
stem/knob/retainer
sub-assembly
spring
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