Blowdown Valves

8/18/2019 Blowdown Valves

1/13

Forged Steel Valves - BB Series

Class 800 Blow Down ValveClass 800 Blow Down Valve - Materials

Class 800 Blow Down Valve - Dimensions

Class 1500/2000 Blow Down Valve

Class 1500/2000 Blow Down Valve - Materials

Class 1500/2000 Blow Down Valve - Dimensions

Blow Down Chart for Class 800

Blow Down Chart for Class 1500/2000

Forged Steel Angle Blow Down Valves

Model Numbers & Speciality Codes

?

F o

r g e d S t e

e l V a l v e s

( B B S e r i e s )


2/13

Class 800 Blow Down Valve

Note: Available orifice size: 1/8”, 3/16”, 1/4” & 5/16”



3/13

2

1

3

Class 800 Blow Down Valve

1

2

3

Micrometer adjustment for handwheel

setting. Accurate adjustments can bemade to 1/10th handwheel turn or for

extremely fine setting to 1/100th

handwheel turn.

Hardfaced seats (stellited) provide high

resistance to galling, wear and erosion.

Body-bonnet joint designed with built-in

compression gauge and spiral wound

gasket, which provides positive seal

and prevents over-stressing of flange.



4/13

1

3

7

4

6

8 9

2

Class 800 Blow Down Valve - Materials

No. PART NAME STANDARD

1 Body A 105

2 Bonnet A 105

3 Seat Ring Stellite

4 Stem 13% Cr SS (Stellited)

5 Orifice Tube 18/8 SS

6 Bonnet Bolt A 193 - B7

7 Handwheel Malleable Iron

8 Gland Packing Graphited Asbestos

9 Gasket Spiral Wound Asbestos with 304SS


5


5/13

Class 800 Blow Down Valve - Dimensions

A

D

E

F

G

H

K

L

M

Wt.(Kg)

48

75

159

151

82.6

57.2

33.8

25.4

12.7

3.6

Model No. BB08N0DIMENSIONS (mm)

Valve

Size

1 inch

25 mm


E = O P E N E D

F = C L O S E D

D

G

L A K

H

M


6/13

100 150 200 300 400 500 1000.5

.6

.7

.8.9

1

2

1.5

2.5

3

4

5

6

7

89

10

155/16

1 4

3/16

1/8

Blow Down Chart for Class 800


B L O W D O

W N C A P A C I T Y - T H O U

S A N D S L B S . P E R H R .

BOILER PRESSURE P.S.I.G.

CONTINUOUS BLOW DOWN CHART

HIGH PRESSURE DROP VALVE

1” Class 800

1/8” - 3/16” - 1/4” and 5/16” DIA ORIFICES

WIDE OPEN CAPACITIES VS. BOILER PRESSURES


7/13


8/13

2

1

3

Class 1500/2000 Blow Down Valve


1

2

3

Micrometer adjustment for handwheel

setting. Accurate adjustments can be

made to 1/10th handwheel turn.

Hardfaced seats (stellited) provide high

resistance to galling, wear and erosion.

Body and bonnet have a full

penetration weld without crevices

where corrosion occurs and provides a

unitary construction. No weld-cutting

required for servicing.


9/13

No. PART NAME STANDARD

1 Body A 105

2 Bonnet A 105

3 Seat Ring A 105 with Stellite

4 Stem 13% Cr SS (Stellited)

5 Orifice tube 18/8 SS

6 Gland Packing Graphited asbestos

7 Handle Malleable iron

1

2

7

6

Class 1500/2000 Blow Down Valve - Materials


5

3

4


10/13

Model No. BB15N0/BB20N0

DIMENSIONS (mm)

A

D

EF

G

H

K

LM

Wt.(Kg)

79

317

435402

184.2

88.9

48.6

34.9

12.7

20.4

Valve

Size

(Class 1500/2000 Socket Weld End)

11/2 inch

40 mm

60

206

311298

168.3

63.5

33.8

22.2

12.7

9.0

1 inch

25 mm

Class 1500/2000 Blow Down Valve - Dimensions


E = O P E N E D

F = C L O S E D

D

T u r n t h r o u g h 9

0 °

G

Note Available Orifice size

NB: 1” : 1/8”, 3/16”, 1/4”, 5/16”,

3/8”, 7/16” & 1/2”

NB: 11/2” : 3/8”, 7/16”, 1/2”, 5/8”,3/4”, 7/8” & 1

F d St l V l BB S i


11/13

Blow Down Chart for Class 1500/2000

BOILER PRESSURE P.S.I.G.

500 600 700 800 9001000 1500 2000 2500 30003200

200

180150

100

9080706050

40

30

25

20

15

10

5

4

32.5

2

1.5

1

1

7/8

5/8

7/16

3/8

1/4

1/2

3/4

5/16

3/16

1/8

B L O W D O W N C A P A C I T Y - T H O U S A N D S L B S . P E R H R .


CONTINUOUS BLOW DOWN CHART

HIGH PRESSURE DROP VALVES

1” & 11/2” - Class 1500/2000

WIDE OPEN CAPACITIES VS. BOILER PRESSURES

1/8” TO 1/2” DIA. ORIFICES - 1” VALVE

3/8” TO 1” DIA. ORIFICES - 11/2” VALVE

Forged Steel Valves BB Series


12/13

Forged Steel Angle Blow Down Valves

(High Pressure drop valves)

Pressure Class Size

l 800 1”

l 1500/2000 1” & 11/2”


Supplied with hardfaced orifice type seat, sized

to suit application.

Class 800 valves - size 1” .... available with

orifice sizes ranging from 1/8” to 5/16”.

Class 1500/2000 valves - size 1” … available

with orifice sizes ranging from 1/8” to 1/2”.

11/2” valves … 3/8” to 1” orifice.

Used on any throttling service which results in

severe erosion and rapid wearing out of

conventional design valves.

Forged Steel Valves BB Series


13/13

MODEL NUMBERS SPECIALITY CODE

ORIFICE SIZE TO BE SELECTED BASED ON REQUIRED BLOWDOWN QUANTITY

[Motor Operation also available]

NOTEModel numbers along with speciality codes are designed to cover essential features. When ordering, please refer modelnumbers with speciality codes to preclude misunderstanding of your requirements. However, a detailed description forSPECIALS must always accompany order.

BB XX N O XX X

Rating

08 - 800 C

15 - 1500 C

20 - 2000 C

Design Variant

N - ANSI VALVE

Size

F6 - 1 “

F7 - 11/2”

Material

B - A 105


Documents

Blowdown Valves