Abstract: This invention provides a compression apparatus capable of flexibly responding to a change in service condition. The compression apparatus comprises a compressor main body for housing rotatively driven rotors, an intake channel connected to an intake port of the compressor main body and equipped with a suction adjusting valve, a discharge channel connected to a discharge port of the compressor main body and equipped with a discharge pressure sensor, a revolution speed setting unit for causing a rotor to have a revolution speed that matches a set number of revolutions, a valve controlling unit for controlling the suction adjusting valve based on a discharge pressure detected by the discharge pressure sensor in such a manner that a pressure of the discharge channel is maintained at a set pressure, and a controller for defining the set number of revolutions and the set pressure based on a condition selected by a user.

Abstract: This invention provides a compression apparatus capable of flexibly responding to a change in service condition. The compression apparatus comprises a compressor main body for housing rotatively driven rotors, an intake channel connected to an intake port of the compressor main body and equipped with a suction adjusting valve, a discharge channel connected to a discharge port of the compressor main body and equipped with a discharge pressure sensor, a revolution speed setting unit for causing a rotor to have a revolution speed that matches a set number of revolutions, a valve controlling unit for controlling the suction adjusting valve based on a discharge pressure detected by the discharge pressure sensor in such a manner that a pressure of the discharge channel is maintained at a set pressure, and a controller for defining the set number of revolutions and the set pressure based on a condition selected by a user.

Abstract: An oil injection type screw compressor which includes an oil tank for separating lubricating oil from gas discharged from a compressor body and collecting the thus separated lubricating oil is constituted such that the oil tank has a substantially L-shaped vertical section composed of a base portion and a column portion provided uprightly on the base portion such that a spacing in the base portion located above an oil storage portion at a lower location in the base portion is formed such that it extends from an upper portion in the base portion to the inside of the column portion, and an oil separating element is provided on the inner side of an exit of gas at an upper portion of the column portion while the compressor body is disposed on the base portion.