Control Products 23 User Manual

- 315 -

DURA-FLO

FEATURES

Applications

● Steam Lines ● Unit Heaters

● Process Equipment ● Oil Preheaters

● Steam Cookers ● Converters

● Steam Heated Vats ● Coils

● Pressing Machinery ● Rotating Drum

DURA-FLO

Inverted

Bucket

Steam Trap

Pressures To 250 PSIG
Temperatures to 450°F

Withstands Severe Conditions

Heavy wall cast iron cover and

body provide many years of

trouble free service.

Smooth Action and

Tight Shutoff

Stainless steel linkage, valve

and seats are precision
manufactured to insure

optimal performance.

Ideal for

“Dirty” Systems

Valve and seat located at

top of trap and stainless

steel strainers available on

most horizontal models

ensure long service.

Maximum Compatibility

with Existing Installations

Pressure change assemblies

are interchangeable with

Armstrong which guarantees

maximum flexibility when

stocking repair parts.

Easy to Maintain

Working parts lift out with
top for quick inspection
and maintenance.

Resists Corrosion

Stainless steel bucket
provides maximum
service life with
minimum deterioration.

Minimizes Effects of
Water Hammer

Open bucket design avoids
collapse typical of sealed floats.

Suitable for Wide Variety
of Loads/Applications

Horizontal and vertical models in
thirteen body sizes are one of the
most comprehensive inverted
bucket trap lines available.

DURA-FLO INVERTED

BUCKET TRAP

- 326 -

DURA-FLO

INVERTED BUCKET

STEAM TRAPS

Pressures To 250 PSIG (17.2 barg)

Temperatures to 450°F (232°C)

Trap Closed – After trap is installed

and primed, steam entering the
trap collects in the top of the
bucket, floating the bucket and
forcing the valve into its seat.

Trap Begins to Open – As

condensate begins to flow into the
trap, steam and air are forced from
the bucket. This causes the bucket
to begin losing buoyancy, tending
to pull the valve from its seat.

Trap Discharges – When enough

condensate has entered the trap,
displacing the steam and air, the
bucket drops, pulling the valve
from the seat and allowing
condensate and air to discharge.

Trap Closes – As the flow of

condensate stops, steam enters
the trap and refloats the bucket,
forcing the valve into its seat. The
cycle then repeats as more
condensate reaches the trap.

OPERA TION

Hardened Stainless Steel Valve and Seat — Long life and

maximum corrosion resistance.

Stainless Steel Bucket — Long lasting, rugged and

naturally resistant to water hammer.

Inexpensive — Low maintenance and initial cost.
Repairable in-line — All working parts lift out of top of trap.
Cast Iron Body — Durable heavy wall construction

provides years of reliable service.

Suitable for Wide Variety of Loads/Applications — Hori-

zontal and vertical models in thirteen body sizes.

Resists Dirt and Scale — Valve and seats positioned at

top of traps and internal stainless strainer available on
most horizontal models ensure long service.

MODELS

●

80S–Low capacity horizontal w/integral strainer

●81S–Medium low capacity horizontal w/integral strainer

●82S–Medium capacity horizontal w/integral strainer

●83S–Medium high capacity horizontal w/integral strainer

●84–High capacity horizontal

●85–Super high capacity horizontal

●86–Ultra high capacity horizontal

●21–Medium low capacity vertical

●22–Medium capacity vertical

●23–Medium high capacity vertical

●24–High capacity vertical

●25–Super high capacity vertical

●26–Ultra high capacity vertical

APPLICA TIONS

●

Steam Lines

●Process Equipment

●Steam Cookers

●Steam Heated Vats

●Pressing Machinery

●Unit Heaters

●Oil Preheaters

●Converters

●Coils

●Rotating Drum

O

PTIONS

●

Repair Kits

Canadian Registration # OE 0591.1C

See page 329

Installation Tip: Always install STV Test & Block Valve

as part of trap station – SEE PAGE 354

Installation Tip: Add Uniflex Pipe Coupling for ease of

maintenance – SEE PAGE 374

Connections: 1⁄2" – 21⁄2" NPT

Furnish and install as shown on the plans, inverted bucket
traps capable of discharging condensate, air and other non­condensible gases without loss of steam. These traps shall have
a heavy cast iron body, hardened stainless steel valve and seat,
all stainless steel linkage and bucket, and an asbestos free
fiber cover gasket.

MAXIMUM OPERATING

CONDITIONS

PMO: Max. Operating Pressure see orifice selection
TMO: Max. Operating Temperature saturated at pressure
PMA: Max. Allowable Pressure 250 psig (17.2 barg)
TMA: Max. Allowable Temperature 450°F (232°C)

MATERIALS OF CONSTRUCTION

Body & Cover ……………………Cast Iron ASTM-A-126/A48
Bucket & Linkage ………………………………Stainless Steel
Valve & Seat …………………………Hardened Chrome Steel
Standpipe ……………………………………………Steel Pipe
Cover Gasket ……………………………Asbestos Free Fiber

DURA-FLO

INVERTED BUCKET

STEAM TRAPS

SPECIFICATION

A

C

B

B

A

DURA-FLO Dimension Table

Trap End Inches (mm) Weight

Connections A B C Lbs (kg)

80S

1

⁄2, 3⁄4 51⁄16 211⁄16 31⁄2 7

(129) (69) (89) (3.2)

81S1⁄2, 3⁄4, 1 51⁄16 211⁄16 47⁄16 8

(129) (69) (113) (3.6)

82S

1

⁄2, 3⁄4 73

7

⁄8 57⁄16 22

(178) (98) (138) (10.0)

83S

3

⁄4

, 1 8

1

⁄8

57

5

⁄8

32

(206) (127) (194) (14.5)

84 1, 11⁄4

95

3

⁄4

7

13

⁄16

47

(229) (146) (199) (21.3)

85 11⁄

2, 2 10

1

⁄

4 88

3

⁄

8 74

(260) (203) (213) (33.6)

86 2, 21⁄2 13 93⁄4 11 140

(330) (248) (279) (63.5)

21

1

⁄2 63⁄8 41⁄4 — 6.5

(162) (108) (2.9)

22

1

⁄2, 3⁄4 85

5

⁄8 —16

(203) (143) (7.3)

23

3

⁄4, 1 101⁄2 67⁄8 —28

(267) (175) (12.7)

24 1, 11⁄4 121⁄2 71⁄2 —35

(318) (190) (15.9)

25 1, 11⁄2 143⁄8 91⁄16 —60

(365) (230) (27.2)

26 11⁄2, 2 1611⁄16 101⁄4 —90

(424) (260) (40.8)

80 SERIES,

HORIZONTAL

20 SERIES,

VERTICAL

- 327 -

DURA-FLO INVERTED

BUCKET TRAP