BBV

Automatic or Manually Actuated Boiler Blowdown Valves DN15 to DN50

The BBV is specifically designed for the removal of suspended/deposited solids and water from the bottom of steam boilers.
The BBV is available in air-actuated and manual versions.
The air-actuated version is supplied with a manual hand lever.
The valve is spring-to-close on power failure and the manual version can easily be upgraded to an automatic version.
When used with a Spirax Sarco blowdown controller the automatic version provides timed control of blowdown, ensuring that the recommended blowdown occurs with the minimum of heat loss and avoids duplication and omissions.
The valve can be fitted with a mechanical switchbox.
This can be linked to the blowdown controller or a BMS system to indicate when the valve has not closed.
An optional ¼” 3-way solenoid valve may be directly mounted on the side of the actuator.

WARNING:
This product should only be used to purge boiler water containing non-metallic sludge and sediment within the pressure and temperature limits.
For optimum performance, ensure that TDS value is in accordance with the boiler’s instructions.

  • Easily upgraded from manual to automatic operation.
  • Dedicated self-adjusting and self-cleaning spindle seals.
  • Engineered for the specific application of bottom blowdown.
  • Flow pressure assists closing.
Air pneumatically actuated supplied with a manual actuation lever BBV43 PN/M Steel body
BBV63 PN/M Stainless steel body
BBV83 PN/M Alloy steel body
Manually actuated complete with a manual actuation lever BBV43 M Steel body
BBV63 M Stainless steel body
BBV83 M Alloy steel body

Please note: All of the ‘M’ versions can be automated to ‘ PN/M‘.

– Automatic bottom blowdown timer controller.
– Mechanical switch (with mounting kit).
– Pneumatic actuator upgrade kit.
– Physical lock kit.
– ¼” 3-way solenoid valve Option

This product range fully complies with the requirements of the Pressure Equipment Directive (PED).

This product is available with material certification to EN 10204 3.1.
Note: All certification/inspection requirements must be stated at the time of order placement.

DN15, DN20, DN25, DN32, DN40 and DN50
½”, ¾”, 1″, 1¼”, 1½”, 2″
Flanged EN 1092 PN40, PN63 and PN100
Flanged ASME 300 and ASME 600

No. Part Material
1 Body BBV4_ Carbon Steel
BBV6_ Stainless Steel
BBV8_ Alloy Steel
2 Plug Stainless Steel + stellite
3 Seat Stainless Steel + stellite
4 Seat gasket Reinforced exfoliated graphite
5 Seat retainer Stainless Steel
6 Cover BBV4_ Carbon Steel
BBV6_ Stainless Steel
BBV8_ Alloy Steel
7 Packing BBV__P PTFE
BBV__H Graphite
8 Cover gasket Reinforced exfoliated graphite
9 Bonnet nuts BBV__H Stainless Steel
BBV6_
Other Carbon Steel
10 Bonnet studs BBV__H Stainless Steel
BBV6_
Other Carbon Steel
11 Actuator clamp nut BBV6_ Stainless Steel
Other Carbon Steel
12 Gland nut Stainless Steel
13 Scraper ring PTFE
14 Yoke SG Iron
15 Closed plate Stainless Steel
16 Hex. head screw Carbon Steel
17 Nut Carbon Steel
18 Upper housing Carbon Steel
19 Diaphragm Reinforced NBR
20 Gasket Reinforced Graphite
21 Vent plug Brass
22 Bolt Carbon Steel
23 Diaphragm plate Aluminium
24 Spindle Stainless Steel
25 Lever stem Stainless Steel
26 Screw Carbon Steel
27 Seal Polyurethane
28 Spring Spring Steel
29 Spring guide Stainless Steel
30 Connector Stainless Steel
31 Lever SG Iron
32 Axis Stainless Steel
33 Roller Stainless Steel
34 Spring graphite Spring Steel
35 Elastic ring Carbon Steel
36 Elastic ring Carbon Steel
37 Washer Carbon Steel
38 O’ring Viton
39 Spacer Carbon Steel
40 Washer Carbon Steel

BBV Automatic or Manually Actuated Boiler Blowdown Valves DN15 to DN50

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