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BV830 Three Way Valve

Blakeborough®

BV830/BV831 Three Way Valves

The Blakeborough® BV830 & 831 series are popular top and skirt-guided control valves available to customers in a variety of trims, capacities, and options. The BV830 & BV831 valves are designed for either blending two different flows or for dividing a flow into two proportional streams.

The Blakeborough® 830 & 831 valves can be used on a wide variety of process applications, including air, water, steam, oil, gases, and chemical services. The BV830 has two inlets and a common outlet branch. It is used for proportional blending of two flows into one stream, on such applications as the control of process fluid temperature downstream of feedwater heaters.

The valve can also be used as a mixing valve to control the blending of two flow streams. The flow capacity is normally constant unless the valve trim is specifically designed with two different CVs. The BV831 valves are used for proportional control on flow splitting applications. The BV831 valve has two outlets and a common inlet branch.

KEY FEATURES & BENEFITS

  • Top and skirt guided

  • Wide range of trim sizes

  • High capacity

  • High stability

  • Balanced

END CONNECTIONS

  • Flanged

  • Butt weld (optional)

  • Socket weld (optional)

  • Screwed (optional)

ACTUATORS

  • Pneumatic single spring diaphragm

  • Pneumatic multi-spring diaphragm

  • Pneumatic double acting piston actuator

  • Self-contained electro-hydraulic

  • Hydraulic (separate HPU and controls unit)

  • Electric

SIZE RANGE & DIMENSIONS

  • 40 - 400mm (1.5 - 16 inches)

TEMPERATURE RANGE

  • -196ºC - 800ºC (-321ºF - 1472ºF)

MATERIALS

  • Carbon steel

  • Grade WCB, Stainless steel

  • Grade 316/304/347, 1.1/4%, chrome moly. steel

  • Grade WC6, 2.1/4%, chrome moly. steel

  • Grade WC9

  • Monel

  • Hastelloy B/C

  • Duplex & Super duplex

OPTIONAL DESIGN FEATURES

  • Soft seating for class VI shut off

  • Downstream silencer for noise reduction

BONNET FORMS

  • Standard – standard range of temperatures

  • Normalising – protection of gland packing for temperatures beyond standard

  • Bellows Seal – high leak protection system

  • Cryogenic – for extremely low temperatures to prevent packing freezing

APPLICATIONS

  • All power applications (except desuperheating)

  • All Oil & Gas applications

  • All other industrial applications

DESIGN STANDARDS

  • ASME B16.34

  • IEC 60534-4 (Formally FCI 70-2)

  • ASME B16.25

  • ASME B16.5

  • NACE MR-01-75

  • BS1560

  • BS4504

  • PED

  • ATEX

DESIGN RATINGS

  • Class 150LB to 2500

  • LBPN10 to PN250

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