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Piston Control Valves

On-Off Solenoid Operated Valve

Models BV10 & BV11 Flow Control Valves
Model BV10, normally closed, and BV11, normally open, solenoid operated Brodie Control Valves are designed for remote on-off flow control. They are externally piped with a needle valve (speed of response control) and strainer as standard equipment.

Principle of Operation
The valves are pilot operated and operate on a balanced piston principle, spring biased to a closed position. Pressure differential overcomes the force of the spring, causing the main valve to open and establish flow. The pilot varies the pressure on the
spring side of the piston for position.

 
Technical specifications and other information  
Model BV10 & BV11 - Design specs Download

Pressure-Reducing Valve

Model BV50 Pressure Reducing Valve
The Model BV50 Brodie Control Valve is a pressure reducing valve designed to regulate a downstream pressure regardless of fluctuations in flow rate or downstream pressure. When correctly installed and adjusted, the Model BV50 valve will regulate downstream pressure at a value within +/-2 PSI (13.8 kPa) of the valve pilot’s setting.

Principle of Operation
The Model BV50 valve is controlled by a pressure reducing pilot which senses line pressure at a selected point and throttles the valve to maintain a desired pressure at that point. If line pressure at the sense point exceeds the setting of the pilot, the pilot throttles the valve until the correct pressure level is reached. Conversely, if line pressure at the sense point falls below the setting of the pilot, the pilot throttles the valve again until the correct pressure level is reached.
      

 
Technical specifications and other information  
Model BV50 - Design specs Download

Back Pressure/Pressure Relief Valves

Model BV60
The Model BV60 Brodie Control Valves are back pressure regulators designed to maintain a specific minimum upstream pressure regardless of fluctuations in flow rate or downstream pressure. When correctly installed and adjusted, the Model BV60 valve will maintain up stream pressure at a value within +/-2 PSI (13.8 kPa) of the valve pilot’s setting. A minimum pressure differential across the valve of 15 PSI (103 kPa ) is required for it to fully open.

Principle of Operation
The Model BV60 valve is controlled by a back pressure pilot which senses line pressure at a selected point upstream of the valve and throttles the valve to maintain a desired minimum pressure at that point. If line pressure at the sense point exceeds the setting of the pilot, the pilot throttles the valve open until the correct pressure level is reached. Conversely, if line pressure at the sense point falls below the setting of the pilot, the pilot throttles the valve closed until the correctpressure level is reached.     

Technical specifications and other information  
Model BV60 - Design specs Download

Flow Limiting Valve

Model BV54 Flow Limiting Valve
The Model BV54 Brodie Flow Limiting Valve is normally opened and designed to maintain a controlled flow rate within +/-2%. The pilot is balanced, single seated valve with large ports and will operate on a differential as low as 5 psi (34.5 kPa).
 
Principle of Operation
The Model BV54 valve is pilot operated and operates on a balanced piston principle, spring biased to a closed position. Pressure differential overcomes the force of the spring, causing the main valve to open and establish flow. The Rate of Flow (Flow Limiting) Valve is normally open and throttles toward a closed position on increasing differential pressure.

 

 
Technical specifications and other information  
Model BV54 - Design specs Download

Differential Control Valves

Model BV70
The Model BV70 Brodie Differential Control Valves are normally closed valves designed to maintain a controlled pressure differential within +/-2%. The pilot is balanced, single seated with large ports and will operate on a differential as low as 5 PSI (34.5 kPa).

Principle of Operation
The Valve is pilot operated and operates on a balanced piston principle, spring biased to a closed position. Pressure differential overcomes the force of the spring, causing the main valve to open and establish flow. The pilot control varies the pressure on the spring side of the piston for position.

 
Technical specifications and other information  
Model BV70 - Design specs Download

2-Stage Differential Control Valve

Model BV87ALP
The Model BV87ALP Brodie Two-Stage Valve is typically used when handling products exhibiting high vapor pressure found in applications such as LPG or ammonia services.
The BV87ALP is a two-stage control valve designed for differential pressure control, pressure control, maximum rate of flow, and excess flow shut-down.

The BV87ALP consists of:
• Basic BV Model Valve
• Two Series BV10 Normally Closed Pilots
• One Series BV11 Normally Open Pilot
• One Series BV70 Differential Pressure Pilot
• One Series BV60 Excess Flow Shut-Down Pilot
• One Series BV54 Maximum Fate of Flow Pilot
• One 3-Way Ball Valve/Excess Flow Shut-Down
• Strainer
• Microswitch
• Pneutrol Controller (Opening Speed)
• Needle Valve (Closing Speed).

 
Technical specifications and other information  
Model BV87ALP - Design Specs Download

2-Stage Hydraulic Valve

Model BV86
The Model BV86 Brodie Two-Stage Control Valve is a two-stage hydraulically actuated control valve designed to utilize the flow stream as the source of power. It is commonly used with a positive displacement flowmeter with a mechanical preset counter to provide shock-free two-stage closure. Through the use of optional accessory pilots, mounted in series with the BV86 pilot, functions such as back pressure, pressure reducing, or rate of flow control can be obtained.

Principle of Operation
The Model BV86 valve is pilot operated on a balanced piston principle, spring biased to a closed position. Pressure differential overcomes the force of the spring, causing the main valve to open and establish flow. The pilot control(s) vary the pressure on the spring side of the piston for a position. The Hydraulic pilot is mechanically attached to and actuated by the preset counter of the flowmeter, and is hydraulically connected to the shut-off valve.

 
Technical specifications and other information  
Model Model BV86 - Design Specs Download

Digital Control Valve

Model BV88
The Model BV88 Digital Control Valve is designed to provide precise flow rate control and batch delivery of fluid products when used with an electronic batch control device. The valve is controlled by the electronic preset for low flow start up, high flow rate control, low flow shutdown, and final shut-off. This also provides for maximum flowmeter accuracy by maintaining a constant flow rate with varying line pressures. The Model BV88 features an external pilot control loop that consists of a normally-open solenoid pilot, a normally-closed solenoid pilot, strainer, and opening/closing speed controls.

Principle of Operation
The valve is pilot operated on a balanced piston principle. It is spring biased to a closed position. Pressure differential overcomes the force of the spring, causing the main valve to open and establish flow. The pilot control(s) vary the pressure on the spring side of the piston for position.

 
Technical specifications and other information  
Model BV88 - Design Specs Download

2-Stage Set Stop Valve

Model BV89
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 flow start-up when used with a time delay circuit or other system controls.

The Model BV89 - Two-Stage shut-off plus pressure control achieved by sensing and controlling valve outlet pressure

 
Technical specifications and other information  
Model BV89 - Design Specs Download