Product Description; Features And Benefits; Principle Of Operation - GE Baker Hughes Masonelian BR200 Instruction Manual

Product Description

BHGE's Masoneilan BR400 and BR200 are high capacity volume boosters for applications that require fast
stroking speeds using pneumatic actuators. Stable operation over a wide range of actuator sizes can be obtained
by adjusting the bypass valve on the booster to modify the dynamic response. The models BR200 and BR400 are
equally suitable for use on diaphragm or piston actuators.

Features and Benefits

• Flow characteristics suitable for control valves
• Short stroking times with consistently stable operation for use on high-volume actuators or on very
demanding stroking time control valve applications
• Built-in bypass valve with locking screw to adjust sensitivity and dynamic response
• Filter on the supply port to protect instrument from particles in air supply
• Corrosion resistant finish and stainless assembly hardware to permit use in corrosive atmosphere

Principle of Operation

The input signal pressure is applied to the upper diaphragm to produce a force that is opposed in a 1:1 ratio by
the output pressure acting on the lower diaphragm through the seal plate orifice. An increase in the input signal
pressure will depress the top diaphragm and open the pilot valve, allowing supply pressure to the output until the
output pressure action on the lower diaphragm re-balances the forces. Conversely, a decrease in the input signal
pressure allows the exhaust valve to open until the output pressure falls to the same value as the input signal
pressure.
A bypass valve allows a controlled flow of input signal direct to the output to obtain stable control for small or
slow changing input signals.
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BHGE
Figure 1 - Cut-away View of BR400 Booster Relay
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