8/11/2019 Purga fondo BBV 980 A.pdf

1/2

Local regulations may restrict the use of this product to below the conditions quoted.In the interests of development and improvement of the product, we reserve the right to change the specification. Copyright 2004

ISO 9001

Cert. No. LRQ 0963008

TI-P405-24AB Issue 4

BBV980AAir/Water Actuated Boiler Blowdown Valve

DescriptionThe Spirax Sarco BBV980A is used specifically for bottomblowdown duty on steam boilers. The BBV980A can be air orwater actuated and is also fitted with a hand lever. An internalscraper ring protects the spindle seals from any deposits on thestem, ensuring a long maintenance free seal life.When used with the BT1000 blowdown controller the systemprovides timed control of bottom blowdown, ensuring that therecommended blowdown occurs with the minimum of heat lossand also avoids duplication and omissions.The valve can be fitted with a mechanical swi tchbox. This can be

linked to a BT1000 or a BMS system to indicate when the valvehas not closed.

A " 3-way solenoid valve is required, and may be directlymounted on the side of the actuator.

Sizes and pipe connectionsDN25, DN32, DN40, DN50 and DN65 flanged BS 4504 PN40orDN32, DN40 and DN50 flanged BS 1560 ANSI Class 300.(Note: Flanges are not ANSI, but PN40 drilled to suit ANSI flanges)

Optional extrasSpirax Sarco BT1000 automatic bottom blowdown timer

Spirax Sarco WAV1 3-port solenoid valve

Spirax Sarco VSB1 mechanical switch

Spirax Sarco Actuator air set

Spirax Sarco BBV980A manual actuation lever

Limiting conditions

Maximum operating pressure 32 bar g

Maximum operating temperature 239C

Designed for a maximum cold PN40 60 bar g

hydraulic test pressure of: ANSI 300 76 bar g

Ambient operating temperature -20C to +90C

Maximum air /water supply pressure 4 bar g

Valve Differential pressure at valve bar gsize 5 10 15 29 32

Minimum DN25 1.5 1.5 1.6 1.6 1.7air /water supply DN32 1.5 1.6 1.6 1.7 1.9pressure bar g

DN40 1.6 1.8 2.0 2.2 2.7

DN50 1.6 1.8 2.0 2.2 2.7

DN65 1.7 2.1 2.4 2.7 3.5

Maximum water actuation supply temperature 70C

Mechanical switch rating 1 A, 25 Vdc

Protection rating IP65

Technical data

Operating time 5 seconds

Clean compressed air free from oil.Operating media Water free from dirt and corrosives.

Maximum temperature 70C

Air/waterconsumption

3.6 L of air @ reference conditions.

(litres/ stroke)0.9 L of water.

Materials (valve)

No. Part Material

1 Body Carbon manganese steel DIN 17245 GS-C25

2 Bonnet Carbon manganese steel DIN 17245 GS-C25

3 Cone head Martensitic stainless steel 1.4122 DIN 17442

4 Cone spindle Austenitic stainless steel 1.4571 DIN 17441

5 Seat ringAustenitic stellitedstainless steel

1.4571 DIN 17441

6 Stuffing ring Leaded brass Cu Zn40 Pb2 DIN 17672 (PT1)

7 Chevron rings PTFE

8Chevronspring

Austenitic stainless steel 1.4310 DIN 17224

9Chevronwasher

Austenitic stainless steel 1.4301 DIN 17440

10 Scraper ring NBR

11 Bush Brass Rg7 DIN 17007 (2.1090)

12 Bonnet gasket Reinforced graphite

13 Studs 1.0501 DIN 17240

14 Nuts 1.1181 DIN 17240

Materials (actuator)

No. Part Material

15Diaphragmhousing

Pressed steel

16Rollingdiaphragm

Fabric reinforced nitrile rubber

17 Piston Pressed steel

18 Springs Steel

19 Pillars Steel

20Stainless steel manual actuation lever(Supplied separately at extra cost)

KvsvaluesValve size DN25 DN32 DN40 DN50 DN65

Kvsvalues 7.5 11 24 30 45

For conversion: Cv(UK) = Kvx 0.963 Cv(US) = Kvx 1.156

WAV1

VSB1

BBV980AAssembly

Lever

Bracket

8/11/2019 Purga fondo BBV 980 A.pdf

2/2

BBV980A Air /Water Actuated Boiler Blowdown Valve TI-P405-24 AB Issue 4

Spare partsThe spare parts available are detailed below. No other parts aresupplied as spares.

Available spares

Head/spindle set - 3, 4(one piece welded cone head and spindle - please state valve size)

Gasket /packing set - 6, 7, 8, 9, 10, 11, 12(stuffing ring, chevron rings, chevron spring, chevron washer,scraper ring, bush and bonnet gasket - please state valve size)

How to order sparesAlways order spares using the description given in the columnheaded 'Available spares' and state the size and type of valve.Example: 1 off Gasket/packing set for a Spirax Sarco DN32BBV980A air/water actuated boiler blowdown valve.

Dimensions/weights (approximate) in mm and kg

*Hand leverValve size A B C D E F1 F2 Valve bore Weight

DN25 265 337 160 115 90 334 361 20 21

DN32 265 342 180 140 90 334 361 25 23

DN40 265 364 200 150 90 568 616 40 26

DN50 265 360 230 165 90 568 616 40 28

DN65 265 365 290 185 90 803 871 50 34

*This is supplied as a separate item at extra cost

Hand lever sections

Valve size Lever sections

DN25 - DN32 1 off

DN40 - DN50 2 off

DN65 3 off

How to specifyTwo port single seat valve suitable for bottom blowdown applicationsup to 32 bar. The valve should be water or air actuated withstellited seats and an internal scraper ring to remove deposits fromthe valve stem.

How to orderExample:1 off Spirax Sarco DN50 BBV980A boiler blowdown valve with

actuator flanged to PN40.1 off WAV1 3-port solenoid valve 240 V suitable for air and water.1 off VSB1 mechanical switch.1 off Actuator air set.2 off BBV980A hand lever sections.

*

3, 4

10

6

7

9

8

11

Part view showing stem seal arrangement

A

B

F1

F2

E

D

C