Ii. installation – Cashco 8900 User Manual
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IOM-8900 Series
II. INSTALLATION:
Handle the 8900 Series carefully to insure seat
tightness. Units could be damaged by over tightening
the studs or mounting it on a tank nozzle fl ange that
is not horizontal.
Carefully inspect the relief vent to insure that
there are no packing materials inside or around
the vent housing.
Before placing the vent on the tank nozzle, the fl ange
face on the tank and the vent should be inspected.
The standard vent is supplied with fl at face fl anges
and can mate with 150# ASME or API 650 fl anges.
CAUTION
When installing any Valve Concepts venting device,
any safety regulations and procedures appropriate to
the specifi c plant site must be understood and followed
in accordance with that facilities corporate legal and
advisory policies.
FLANGE TYPE
O.D. in.
I.D. in.
B.C. in
Bolt Hole in.
Quantity
16” - 150#
23.50”
15.25’
21.25”
1.13”
16
20 - 150#”
27.50”
19.25”
25.00”
1.25”
20
24” - 150#
32.00”
23.25”
29.50”
1.38”
20
20” - API 650
26.00”
19.25”
23.50”
.75”
16
24” - API
30.00”
23.25”
27.50”
.75”
20
Gasket Dimensions
CAUTION
DO NOT attempt to change pressure settings, either by
adding additional weight to the pallet assembly or by
changing the spring compression without consulting
the factory.
The connecting fl anges must be fl at within 0.015”
(.381 mm), clean and free of scratches, corrosion
and any tool marks.
Inspect the gasket and make sure it is compatible
for the service. It is recommended to use a full
faced gasket to avoid defl ection of the body fl ange.
The vent should be installed using a wire cables
or straps connected to the lifting lugs/eyebolts (39)
located around the fl ange base. This will prevent
any damage to the hood.
Lubricate all studs and nuts with an appropriate
thread lubricant. If stainless steel fasteners are
used, select an anti-seize lubricant such as moly-
disulfi de.
Align the gasket with the bolt circle of the fl ange.
Lower the vent body carefully on the nozzle fl ange;
keep the gasket between the fl anges. Install the
studs and tighten the nuts by hand.
Using an alternating star pattern, tighten all the
fasteners to one-half recommended torque - see
Table 1. Make sure that the fl anges are not distorted
and that the gasket is evenly compressed. Finish
tightening fasteners to torque values in Table 1.
SECTION II
TABLE 1
Flange
Type
Size
Qty
Holes
Bolt
(in)
(UNC)
Torque (ft-lbs)
Raised Face
Flat Face
150# ASME
16”
16
1.000
52
104
20”
20
1.125
63
110
24”
20
1.250
86
148
API # 650
20”
20
0.625
35
53
24”
20
0.625
43
61