User manual | 980 Series Inverted Bucket Steam Traps

980 Series Inverted Bucket Steam Traps
Cast Steel for Horizontal Installation With Integral Strainer
Steam Trapping and
Steam Tracing Equipment
For Pressures to 600 psig (41 bar)...Capacities to 4,400 lb/hr (2,000 kg/hr)
CC
C
A
B
D
E
Description
Options
A unique leverage system multiplies the force provided by the bucket to open
the valve against system pressure. The mechanism is free-floating, and has
no fixed pivots to create wear or friction.
Specification
Armstrong offers two sizes of cast steel traps with in-line horizontal pipe
connections and integral strainers with a choice of screwed, socketweld
or flanged connections.
Because the mechanism is located at the top of the trap, no dirt can collect
on the orifice. Small particles of dirt are held in suspension until discharged
by the full differential purging action when the bucket sinks, pulling the valve
off the seat.
The discharge orifice is surrounded by a water seal, preventing live steam
loss. Automatic air venting is provided by a small vent hole in the bucket, which
provides continuous automatic air and CO2 venting at steam temperature.
Inverted bucket traps drain continuously, although discharging intermittently,
allowing no condensate backup. They are also resistant to water hammer.
600 psig @ 650°F (41 bar @ 343°C)
600 psig (41 bar)
Screwed NPT and BSPT
Socketweld
Flanged
Specify:
• Model number
• Size and type of pipe connection. When flanges are required,
specify type of flange in detail
• Maximum working pressure that will be encountered or orifice size
• Any options required
980 Series Traps
Model No.
Test Plug
See page 185 for dimensional information for flanged and
socketweld connections.
Body: Internals: Valve and seat: Strainer: Test plug:
How to Order
Pipe Connections
Connections
Materials
Inverted bucket steam trap, type ... in cast steel, with continuous air venting
at steam temperature, free-floating stainless steel mechanism, integral
strainer, and discharge orifice at the top of the trap.
For a fully detailed certified drawing, refer to CD #1007.
Maximum Operating Conditions
Maximum allowable pressure
(vessel design): Maximum operating pressure: • Stainless steel internal check valve
• Thermic vent bucket (983 only) maximum operating pressure 250 psig (17
bar)
• Scrub wire
ASTM A216 WCB
All stainless steel—304
Hardened chrome steel—17-4PH
Stainless steel—304
Carbon steel
981
983
in
mm
in
mm
1/2, 3/4
15, 20
3/4, 1
20, 25
1/2
15
3/4
20
“A” (Flange Diameter)
4-1/2
114
7-1/4
184
“B” (Height)
8-5/8
219
12-5/16
313
“C” (Face-to-Face, Scr or SW)
5-3/8
137
7-3/4
197
“CC” (Face-to-Face,
Class 600 ANSI Flanges*)
1/2" (15 mm) connection
3/4" (20 mm) connection
1" (25 mm) connection
9-3/8
9-1/2
—
238
241
—
—
11-3/4
12-1/8
—
298
308
4-13/16
122
7-9/16
192
3/8
9
3/4
20
“D” (Bottom to CL Inlet)
“E” (Blowdown Connection)
Weight, Scr or SW lb (kg)
Weight, 600 Class
Flanges lb (kg) 1/2" connection
11-1/2 (5.2)
43 (19.5)
18 (8.2)
50 (22.7)
*Face-to-face, other flanges on request. Also available with ANSI raised
face, flat face or ring joint flanges.
82
Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information.
North America • Latin America • India • Europe / Middle East / Africa • China • Pacific Rim
armstronginternational.com
980 Series Inverted Bucket Steam Traps
Cast Steel for Horizontal Installation With Integral Strainer
For Pressures to 600 psig (41 bar)...Capacities to 4,400 lb/hr (2,000 kg/hr)
Model 983 Capacity
Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information.
Next
North America • Latin America • India • Europe / Middle East / Africa • China • Pacific Rim
armstronginternational.com
Steam Trapping and
Steam Tracing Equipment
Model 981 Capacity
83

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