Spirax Sarco BCVi43 Blowdown Control Valve Installation and Maintenance Instructions

The Spirax Sarco BCVi43 is an electro-hydraulically actuated control valve manufactured in carbon steel using the market proven Spira-trolTM body. This valve has been specifically designed for the blowdown of steam boilers or for other high pressure drop, low flow applications, and is generally used with a blowdown controller as part of an automatic TDS control system. The valve may also be used for other high pressure drop, low flowrate applications such as boiler feedpump recirculation.

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Spirax Sarco BCVi43 Blowdown Control Valve Installation and Maintenance Instructions | Manualzz

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Key features

  • Electro-hydraulically actuated
  • Carbon steel construction
  • Spira-trolTM body
  • Designed for steam boiler blowdown
  • High pressure drop, low flow applications
  • Used with a blowdown controller
  • Automatic TDS control system
  • Boiler feedpump recirculation

Frequently asked questions

The maximum operating pressure for saturated steam service is 31.1 bar g (449 psi g) for EN 1092 PN40 and 41.7 bar g (605 psi g) for ASME class 300.

The maximum operating temperature is 300°C (572°F) for EN 1092 PN40 and 425°C (797°F) for ASME class 300.

The adjustable gland nut is used to adjust the stem seal packing to prevent leakage.

To rotate the actuator, loosen the two clamping screws, rotate the actuator to the desired position, and then tighten the clamping screws.

The maximum conductor size is 2 mm² (14 AWG) for the 24 V version.
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