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The volume booster amplifies the volume at a 1 to 1 ratio of pilot pressure to outlet pressure.
The pilot pressure has no constant bleed. The bias spring at booster R200 generates a positive
shift of the pressure range between pilot pressure and outlet pressure.
Booster R201 with great relief capacity is a combination of two R200 boosters.

Media: compressed air or non-corrosive gases
Supply_pressure: max. 17 bar
Pilot_pressure: max. 10 bar, pilot port G1/4 at R200, 1/4"NPT at R201

Accuracy: at supply pressure variation of 7 bar = < 20 mbar pressure deviation
Response_sensitivity: 30 mbar

Air_consumption: without constant bleed
Relieving_function: relieving, optionally non-relieving
Relief_capacity: 1800 l/min at 0.3 bar overpressure above setpoint at R200, 9000 l/min at R201
Gauge_port: G1/4 on both sides of the body at R200, 1/4"NPT at R201
Mounting_position: any

Temperature_range:
0 °C to 90 °C / 32 °F to 194 °F, for appropriately conditioned compressed air down to -40 °C / -40 °F

Body: aluminium die-cast
O-rings: PTFE
Diaphragm: NBR/Buna-N
Inner_valve: stainless steel, cadmium-plated steel and brass