Boiler house Bottom blowdown systems
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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 without notice. © Copyright 2025
TI-P405-51 EMM Issue 6
BBV Automatic or Manually Actuated Boiler Blowdown Valves DN15 to DN50
Description 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. Principal features:
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- 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. Available types of boiler blowdown valve: Air pneumatically actuated supplied with a manual actuation lever BBV43 PN/M Steel body BBV63 PN/M Stainless steel body
BBV43 M
Steel body
DN15 BBV_3 PN/M shown
Manually actuated complete with a manual actuation lever
BBV63 M
Stainless steel body
Please note: All of the ' M ' versions can be automated to ' PN/M '.
Optional extras: - Automatic bottom blowdown timer controller. - Mechanical switch (with mounting kit). - Pneumatic actuator upgrade kit. - Physical lock kit. - ¼" 3-way solenoid valve Option Standards This product range fully complies with the requirements of the European Pressure Equipment Directive 2014/68/EU. Certification 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.
TI-P405-51 EMM Issue 6
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BBV Automatic or Manually Actuated Boiler Blowdown Valves DN15 to DN50
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