Installation & Maintenance Instructions
INTRINSICALLY SAFE Ċ SÉCURITÉ INTRINSÈQUE Exia
4-WAY MANUAL RESET SOLENOID VALVES
NO-VOLTAGE RELEASE Ċ 1/4 OR 3/8I NPT Ċ BRASS CONSTRUCTION
SERIES
IS8408
Form No.V6354-Sec.2
(Section 2 of 2)
NOTICE: See Installation and Maintenance Instructions, Form No. V6354 - Section 1 of 2 for detailed instructions.
Torque Chart
Part Name
(see note)
Torque Value
Inch-Pounds
Torque Value
Newton-Meters
Figure Numbers
Where Used
Solenoid base
sub assembly
Figure 2
Bonnet assembly
175 ± 25
19,8 ± 2,8
Figure 5
Lower end cap
Housing nut
Figure 3
Bonnet screws
110 ± 10
12,4 ± 1,1
Figure 5
Cover screws
10 +5 / -2
1,1 +0,6 / -0,2
Figure 3
Bracket screws
125 ± 12
14,1 ± 1,4
Figure 4
Note: Thread all parts by hand as far as possible. Then torque evenly in a crisscross manner where applicable.
Lubrication Chart
Lubrication
Parts to be lubricated
DOW CORNINGr 111 Compound lubricant or
an equivalent high-grade silicone grease.
housing gasket
bonnet gasket
exhaust seat gasket
end cap seat gasket
lower end cap gasket
DOW CORNINGr 200 Fluid lubricant or
an equivalent high-grade silicone fluid
solenoid base gasket
Texaco Inc. Code No. 2346 Low Temp Grease EP
(ASCO No. 208832-9)
William F. Nye, Inc. Fluorogel 852B lubricant
(ASCO No. 208832-1)
e
ASCO Valves
MCMXCV All Rights Reserved.
seat gasket (2)
end cap gasket
Stem end (outside diameter) of core assembly.
U-cups on inner and outer disc assemblies.
Seating surface of exhaust seat and end cap seat.
Printed in U.S.A.
Page 5 of 8 (Section 2 of 2)
50-60 Hanover Road, Florham Park, New Jersey 07932
operator housing
(cutaway view)
Lubricate here
(See Note 2)
solenoid bushing
(see note 1)
core assembly
(see note 2)
solenoid base
sub-assembly
solenoid base
gasket
Indicates parts supplied
in ASCO Rebuild Kit
Notes:
1. Not present on all constructions.
2. Lubricate stem end (outside diameter) of core assembly , see Valve Reassembly Step 16.
Figure 2. Series IS8408 no-voltage release construction, partial view of solenoid assembly.
Indicates parts supplied
in ASCO Rebuild Kit
cover gasket (2)
upper housing cover
housing nut
lockwasher
bracket
lower housing
cover
flat washer (3)
cover screw (5)
split lockwasher (3)
bracket screw (3)
manual override
Figure 3. Operating movement
Page 6 of 8 (Section 2 of 2)
ASCO Valves
Form No.V6354 - Sec. 2
50-60 Hanover Road, Florham Park, New Jersey 07932
housing gasket
anti-rotation
mounting bracket
Indicates parts supplied
in ASCO Rebuild Kit
valve stem
adjusting screw
with hex locknut
bonnet assembly
bleed hole
(check for leakage)
stop washer
Important
See Torque and
Lubrication Chart
5/16I wrenching flat
valve stem with retaining ring
retaining ring (Do Not Remove)
bonnet gasket
partial view of
mounting bracket
exhaust seat gasket
exhaust seat
inner disc assembly
disc holder
disc spring
outer disc assembly
end cap seat gasket
mounting bracket
screws (2)
lower end cap
end cap seat
lower end
cap gasket
end cap screws (4)
disc holder spring
seat gasket (2)
end cap gasket
end cap
Note:
Inner and outer disc assemblies are identical.
Figure 4. Main valve body assembly.
Form No.V6354 - Sec.2
ASCO Valves
Page 7 of 8 (Section 2 of 2)
50-60 Hanover Road, Florham Park, New Jersey 07932
solenoid (partial view)
operating movement
(cutaway view to show
valve stem adjustment)
valve stem
hex locknut (loose on adjusting
screw thread)
adjusting screw
wrenching flats for
5/16I open end
wrench
valve body
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
ÇÇÇÇ
DISC
HOLDER
ASCO
216-849
NO TOUCH
TOUCH
ASCO
216-849
NO TOUCH
DISC
HOLDER
Touch" gage
position
TOUCH
No Touch" gage
position
Touch, No Touch gage
supplied in Rebuild Kit
Rotate valve stem clockwise
until Touch" gage just touches
the base of the valve body
as shown.
A small gap should exist
between the No Touch"
gage end and the base
of the valve body
as shown.
IMPORTANT
Solenoid must be energized, button pressed and valve set in
the latched position when adjusting the valve stem.
Figure 5. Partial cutaway view to show valve stem adjustment.
Page 8 of 8 (Section 2 of 2)
ASCO Valves
Form No.V6354 - Sec. 2
50-60 Hanover Road, Florham Park, New Jersey 07932