A A1 Series Float Thermostatic Steam Traps

A A1 Series Float Thermostatic Steam Traps
A & AI Series Float & Thermostatic Steam Trap
Cast Iron for Horizontal Installation, With Thermostatic Air Vent
Steam Trapping and
Steam Tracing Equipment
For Pressures to 175 psig (12 bar)...Capacities to 8,600 lb/hr (3,900 kg/hr)
C
C
K
IN L ET
B
B
M
TL ET
OU
D
D
N
N
H
H
Model A Traps
Model AI Traps
Description
Options
Armstrong A & AI Series F&T traps are for industrial service from 0 to
175 psig and feature a balanced pressure phosphor-bronze type bellows
caged in stainless steel. Armstrong A & AI Series F&T traps are designed
for service on heat exchange equipment where there is a need to vent air
and non-condensable gases quickly.
Integral vacuum breaker. Add suffix VB to model number.
CAUTION: Do not use a conventional vacuum breaker open to the atmosphere
in any system that incorporates a mechanical return system that carries
pressure less than atmospheric pressure. This includes all return systems
designated as vacuum returns, variable vacuum returns or subatmospheric
returns. If a vacuum breaker must be installed in such a system, it should be
of the type that is loaded to open only when the vacuum reaches a calibrated
level well in excess of the design characteristics of the system.
The AI Series F&T traps feature the convenience of in-line connections with
the same rugged internals found in the A Series.
Maximum Operating Conditions
Specification
Maximum allowable pressure (vessel design):
175 psig @ 377°F (12 bar @ 191°C)
Maximum operating pressure:
Model 30-A, AI:
Model 75-A, AI:
Model 125-A, AI:
Model 175-A, AI:
Float and thermostatic steam trap, type ... in cast iron, with thermostatic air vent.
For a fully detailed certified drawing, refer to CD #1009.
30 psig (2 bar) saturated steam
75 psig (5 bar) saturated steam
125 psig (8.5 bar) saturated steam
175 psig (12 bar) saturated steam
How to Order
NOTE: Cast iron traps should not be used in systems where excessive
hydraulic or thermal shock are present.
Pressure
Model
Connection
Size
Option
75
AI
2
VB
3=3/4"
4=1"
5 = 1-1/4"
6=1-1/2"
8=2"
VB = Vacuum Breaker
Connections
Screwed NPT and BSPT
Materials
Body and cap:
Internals: Valve:
Seat: Thermostatic air vent:
A & AI Series Traps
Trap Series
Pipe Connections
30
75
125
175
ASTM A48 Class 30
All stainless steel—304
Stainless steel—440
Stainless steel—303 (ASTM A582)
Stainless steel—440F in 1-1/2'' and 2''
Stainless steel and bronze with phosphor
bronze bellows, caged in stainless steel
in
mm
in
mm
A = Standard Connection
2=1/2"
3=3/4"
4=1"
AI = In-line Connection
Model A
in
mm
in
mm
in
mm
in
Model AI
mm
3/4
20
1
25
1-1/4
32
1-1/2
40
2
50
“B” (Height)
5-1/8
130
5-1/8
130
5-13/16
148
7-7/16
189
9-3/4
248
5-1/2
140
“C” (Face to Face)
4-7/8
124
4-7/8
124
4-5/8
117
5-3/4
146
7-5/8
194
5
127
“D” (Bottom to CL)
“H” (Width)
“K” (Connection Offset)
“M” (CL to CL)
“N” (Top to CL)
Weight lb (kg)
1/2, 3/4, 1 15, 20, 25
1
25.4
1
25.4
1-7/32
31.0
1-13/32
35.7
1-11/16
42.9
2-9/16
65.1
6-7/16
164
6-7/8
164
8-1/8
206
8-7/16
214
11-5/8
295
6-1/2
165
3/8
95.2
3/8
95.2
—
—
—
—
—
—
—
—
3
76.2
3
76.2
3
76.2
4-3/16
106
6
152
—
—
3-3/8
85.7
3-3/8
85.7
3-3/4
95.2
3-3/4
95.2
5
127
3-11/16
93.7
9-1/2 (4.3)
8-1/4 (3.7)
11 (5.0)
18-3/4 (8.5)
40 (18.1)
9-3/4 (4.4)
NOTE: Cast iron traps should not be used in systems where excessive hydraulic or thermal shock are present.
122
Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information.
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A & AI Series Float & Thermostatic Steam Trap
Cast Iron for Horizontal Installation, With Thermostatic Air Vent
For Pressures to 175 psig (12 bar)...Capacities to 8,600 lb/hr (3,900 kg/hr)
Model A & AI Series Capacity—75 psi
Model A & AI Series Capacity—125 psi
Model A & AI Series Capacity—175 psi
Steam Trapping and
Steam Tracing Equipment
Model A & AI Series Capacity—30 psi
Options
Vacuum Breaker—3/8'' (10 mm) and 1/2'' (15 mm) NPT
Many times, condensate will be retained ahead of steam traps because of
the presence of a vacuum. To break a vacuum, air must be introduced into
the system by means of a vacuum breaker.
For maximum protection against freezing and water hammer in condensing
equipment under modulated control, vacuum breakers are recommended.
Armstrong A and AI Series F&T Traps are available with integral vacuum
breakers. Maximum service pressure is 150 psig (10 bar).
D
B
Vacuum Breaker
Size
“B” Pipe Connections
in
mm
in
mm
1/2 NPT
15
3/8 NPT
10
3/8 NPT
10
1/4 NPT
6
“C” Height
1-1/4
32
1-3/32
28
“D” Width
7/8 Hex
22 Hex
11/16 Hex
17 Hex
C
Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information.
Next
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123
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