Design Specifications

DSBV89
Revision 02

Model BV89 Two-Stage Valve

Description
The Model BV89 Brodie Two-Stage Valve is
normally closed and designed for precise,
accurate control and shut-off of petroleum
products. The valve controls a predetermined
amount of product to guarantee smooth, positive
shut-off. Operational functions may include low WARNING
flow start-up when used with a time delay circuit
Do NOT operate this instrument in excess of the
or other system controls. specifications listed. Failure to heed this warning could
result in serious injury and/or damage to the equipment.
The Model BV89 - Two-Stage shut-off plus
pressure control achieved by sensing and
controlling valve outlet pressure. approximately 10 to 20 percent of the rated
Principle of Operation capacity of the meter. The preset trips the
sequencing switches again and the valve closes.
Typical Control Systems consist of three primary
pieces of equipment: flowmeter, preset counter Design Features
(electronic or mechanical), and two-stage shut-off • Precision flow rate and batch control
valve. The meter is the primary flow measuring • Modular construction -all internal parts including
device. The preset counter is used to determine seat ring can be removed with the cylinder
the volume of liquid to be controlled by the valve assembly without disturbing line connections.
at predetermined settings. The sequential • No diaphragms or stuffing boxes
switches of the batch controlling mechanism • 45° body design assures high capacity
control the solenoid pilots of the control valve. • Positive shut-off
• Linear control characteristics with uniform re-
The control valve operates on a balanced piston sponse speed
principle. Electrically operated solenoid pilots • Automatic check valve - no reverse flow
position the valve piston by increasing or • Fail-safe closes on loss of electrical power
decreasing hydraulic pressure on the top of the • Characterized ports for better low flow response
piston as dictated by sequencing switches. When
pressure on both sides of the valve piston is Applications
equal, the main valve spring acts as a differential Two-stage electrical control valves are suited for
force and closes the valve. When the pressure those applications requiring precise shut-off, such
against the bottom of the piston exceeds the as truck or railcar loading or similar batching
pressure (plus the force of the spring) exerted operations.
against the top of the piston, spring pressure is
overcome and the valve is opened. “AP” (Aggressive Products) Option
The control valve is designed to close in two The “AP” option valve cylinder incorporates a
distinct stages. As the preset counter reaches the combination of seals and O-ring materials to
first stage of shut-off, the preset trips the provide optimum performance in aggressive
sequence switches to place the valve in the first product applications. Specify “AP” Option at time
stage (low flow) shut-off position. The first stage of order when valve is to be used on products
closure reduces the flow rate through the valve to which may affect standard seals.
Materials of Construction Ordering Information
Main Valve Body: Steel - ASTM-A216-GR-WCB
Main Valve Cylinder: 17-4 PH Stainless Steel, When ordering, the following information must be
Heat Treated supplied:
Main Valve Piston: Stainless Steel • Size
Seat Ring: Stainless Steel • Flange Connections
O-Rings: Viton (Standard), Other Materials • Product, Product Viscosity, Product Specific
(Optional) Gravity
Other Internal Parts: Stainless Steel • Minimum and Maximum Flow Rate
Pilot Valve Body: Steel (Standard) • Minimum, Normal and Maximum Operating
Pilot Valve Trim: Stainless Steel Temperature
Tubings and Fittings: Steel (Standard) • Control Functions to be Performed
• O-Ring Material
Optional Equipment • Control Pilot Materials
• Pilot Line Isolation Block Valves • Tubing Material
• Fusible Link Pilot Valve (closes at 1600F) • Pilot Spring Range
• Manual Override (Opens Valve) • Pilot Spring Setting (psi or kPa)
• Adjustable Thermal Relief
• Closing Speed Control
• Low Flow Start-up
Recommended Spare Parts
O-Rings
Maximum Operating Pressure Differential (MOPD):
175 psi (1207.5 kPa) MOPD.

Flange Connections/Ratings (ANSI)

Valve Size Connections Max Working Pressure @100F
150 lb. ANSI 285 PSI
2" - 6"
300 lb. ANSI 740 PSI
Temperature Range : -20F to 150F (-29C to 66C)

Valve Capacity Data

Valve Size 2" 3" 4" 6"

*Cv-gpm 90 190 315 700
*Cv based on wide open valve utilizing water at 60F (15.6C).

Shipping Weight and Volume (150# ANSI)

Shipping Weight and Volume (Approximate)

2" 69 lbs. @ 3 Cu. Feet

31.3 kgs. @ .085 Cu. Meters
3" 105 lbs. @ 2.36 Cu. Feet
47.63 kgs. @ .067 Cu. Meters
4" 140 lbs. @ 2.51 Cu. Feet
63.5 kgs. @ .071 Cu. Meters
6" 250 lbs. @ 4.84 Cu. Feet
113.4 kgs. @ .137 Cu. Meters
Typical Installation
Closed Position
The normally closed solenoid is closed. The normally open solenoid is open. Y-port (P3) to Z-port (P2)
is closed. X-port (P1) and Y-port (P3) pressures are balanced. The main valve spring being the
differential force, closes the piston and keeps it seated.

Fully Open - No Control

The normally closed solenoid is open. The normally open solenoid is closed. Y-port (P3) is open to Z-
port (P2). X-port (P1 ) is closed off by the normally open solenoid. The pressure on the bottom of the
piston (P1) is greater than the pressure at (P3) plus the spring force. (P1 minus P2) is equal to or
greater than the spring force.
Low Flow Position
The normally closed solenoid is closed. The normally open solenoid is closed. Y-port (P3) to Z-port
(P2) is closed. X-port (P1) to Y-port (P3) is closed. Note: The product cannot flow to or from the top
of the piston (Y-port). The piston is locked hydraulically in the low flow position. During the transition
stage from high flow to low flow, the normally closed solenoid was closed and the normally open
solenoid was open (X-port/P1 /to Y-port/P3/was open). During the closing cycle, the limit switch was
activated causing the N.O. solenoid to be closed hydraulically locking the valve in an intermediate
position.

Dimensions (For Certified Dimensional Prints - Consult Factory)

Valve 150# ANSI

Size A B
mm 260 249
2"
Inches 10 1/4 9 13/16
mm 279 273
3"
Inches 11 10 3/4
mm 330 278
4"
Inches 13 10 15/16
mm 432 400
6"
Inches 17 15 3/4

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the
products or services described herein or their use or applicability. Brodie Meter Co., LLC reserves the right to modify or improve the designs or specifications of such products at any time without notice.

19267 Highway 301 North (30461)

PO Box 450 • Statesboro, GA 30459-0450
Phone: (912) 489-0200 • Fax: (912) 489-0294
www.brodieintl.com