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Marsh Bellofram
P289RC Exhaust Booster

P289RC Exhaust Booster

Product catalog summary

Overview: The P289RC is a high-capacity exhaust booster designed for applications requiring rapid response, such as large pneumatic actuators and valve controls. It is particularly effective in managing surge and recycle valves in compressor stations to handle compressor surges and sudden pressure changes.

Specifications:

Port Size: 1 NPT
Maximum Relief Inlet Pressure: 125 PSIG (8.6 BAR)
Temperature Range: -20–150 ºF with Nitrile and Neoprene, 0–300 ºF with Fluoroelastomer
Approximate Weight: 3 lbs. (1.36 kg)
Exhaust Max Rate: Cv=22, 107,988 scfh

Materials of Construction:

Body, Bonnet: Aluminum
Diaphragm: Nitrile or Fluoroelastomer
Gaskets: Composite
O-rings: Nitrile or Fluoroelastomer
O-ring Piston and Spacer: Aluminum
Stem: Aluminum
Spring: Zinc-plated steel
Diaphragm Piston: Zinc-plated steel

Operation: The P289RC connects the 1/4” spring case port to a controlling instrument (e.g., I/P, Controller, Positioner) and the 1” supply/relief port to the actuator. A bypass valve is necessary for proper operation, connecting the inlet and outlet of the P289RC. The booster opens further as the differential pressure across the bypass valve increases, with a factory-set opening of approximately 1.5 PSIG, which is non-adjustable in the field.

Parts and Components: The document lists various parts and their corresponding part numbers, including the body, stem, O-rings, pistons, springs, and other components necessary for the assembly and maintenance of the P289RC.

Catalog excerpts

The P289RC is designed as a high capacity exhaust booster and used in applications utilizing large pneumatic actuators and valve controls where a rapid response is required. Ideally suited in applications with surge valves or recycle valves on compressor stations where the operation is sped up to accommodate compressor surges and sudden pressure changes from the out devices. The 1/4" spring case port is connected to the controlling instrument such as an I/P, Controller or Positioner, and the 1" supply/ relief port is connected to the actuator. It is required for proper operation that a bypass valve connect the inlet and outlet of the P289RC wherever is convenient. The greater the differential pressure develops across the bypass valve the further the exhaust booster opens. The factory set opening of the P289RC is approximately 1.5 PSIG and is not adjustable in the field. As the differential pressure decreases between the controlling instrument and the actuator, the booster exhaust valve closes. SIGNAL PORT BYPASS VALVE

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P289RC Exhaust Booster

P289RC Exhaust Booster

Catalog excerpts

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