A seal includes a mating ring that rotates relative to a carbon primary ring at a seal interface. A buffer gas is provided into the seal and passes from the back of the primary ring to the seal interface. The seal can be used as a separation seal or in combination with another seal.

A system and method for rapid pressurization of a motor compartment and cooling system during a shutdown, a surge, and/or other situations in which the suction pressure significantly varies. A motor/compressor arrangement includes a seal gas system fluidly communicating with the motor compartment via a motor pressurization line, with the outlet of the compressor, and with a shaft seal. A motor pressurization valve is coupled to the motor pressurization line and a controller is configured to open the motor pressurization valve at start-up of the motor-compressor to supply seal gas to the motor compartment and to pressurize the motor compartment when a difference between the seal gas supply pressure and the suction pressure is indicative of the seal gas supply pressure being insufficient.

A water pump has a pump section having radial impeller blades, a rotational shaft for rotating the radial impeller blades, and a motor section provided in the rear of the pump section and driving the rotational shaft. The motor section has a motor casing, a motor housed in the motor casing and rotating the rotational shaft, bearings provided on both sides of the motor interposed between them on the rotational shaft, interposed between an inner surface of the motor casing and the rotational shaft, and rotatably supporting the rotational shaft. In the motor casing, a vent hole for venting air between a motor space in which the motor is disposed in the motor casing and an outside of the motor casing is formed.

A water pump that minimizes defects in which cooling water flows externally is provided. The water pump is provided with a rotating shaft supported by a body via a bearing, an impeller that is disposed at one end of the rotating shaft, and a seal member that is disposed between the impeller and the bearing. A drain passage that sandwiches the seal member and communicates with a space formed on the opposite side of the impeller is formed in the body, and a reservoir is formed downstream from the drain passage. At an upper position of a wall portion that forms the reservoir, a drain hole is formed, and a water-absorbing planar member is positioned in the reservoir.

An axially-split turbomachine comprising a casing comprised of a first casing portion and a second casing portion, forming a housing for a rotor arranged for rotation therein. The rotor comprises a shaft and at least one impeller mounted on the shaft. The casing comprises at least one shaft passageway through which the shaft extends from the interior of the casing towards the exterior of the casing. The sealing arrangement comprises a linear sealing member, extending between the first and the second casing portions. The sealing arrangement further comprises at least one sealing ring portion surrounding said at least one shaft passageway. The sealing ring portion and the linear sealing member form a continuous sealing body.

An axially-split turbomachine comprising a casing comprised of a first casing portion and a second casing portion, forming a housing for a rotor arranged for rotation therein. The rotor comprises a shaft and at least one impeller mounted on the shaft. The casing comprises at least one shaft passageway through which the shaft extends from the interior of the casing towards the exterior of the casing. The sealing arrangement comprises a linear sealing member, extending between the first and the second casing portions. The sealing arrangement further comprises at least one sealing ring portion surrounding said at least one shaft passageway. The sealing ring portion and the linear sealing member form a continuous sealing body.

A pump is provided which includes a pump housing, a drive shaft rotatably installed in the pump housing through a ball bearing, a pulley integrally connected to one end of the drive shaft through a flange wall, an impeller connected to the other end of the drive shaft, a cylindrical base part integrally connected to an outer periphery of the flange wall and six through openings formed in an outer peripheral part of the flange wall, in which each of the through openings has, at a generally middle part of a bottom surface of an inner surface thereof, a pathway groove that extends substantially along an inner cylindrical surface of the cylindrical base part, so that the performance of discharging water, dust and the like from the through openings formed in the flange wall is increased.

A compressor arrangement having a main compressor, a piping system containing process gas to be extracted after the shut-down of the main compressor and one or more components emitting or leaking depressurized process gas while the compressor is operating or starting up; the compressor arrangement further comprises one or more collectors arranged to collect the depressurized process gas emitted from said components and an additional compressor fluidly coupled with the piping system and with the collectors in in order to compress the depressurized process gas coming from the components while the compressor is starting up or operating and to compress process gas coming from the piping system after a shut-down of the compressor.

A dry gas mechanical seal system configured to inhibit the emission of process gas. The mechanical seal system having tandem first and second stage seals, and a single separation gas supply subsystem configured to direct a supply of separation gas from an inlet through interfacing portions of the first stage seal into a process cavity and from the inlet through the interfacing portions of the second stage seal and out through an outlet to the atmosphere, thereby inhibiting the emission of process gas between a compressor housing and a rotating compressor shaft.

A dry gas mechanical seal system configured to inhibit the emission of process gas. The mechanical seal system having tandem first and second stage seals, and a single separation gas supply subsystem configured to direct a supply of separation gas from an inlet through interfacing portions of the first stage seal into a process cavity and from the inlet through the interfacing portions of the second stage seal and out through an outlet to the atmosphere, thereby inhibiting the emission of process gas between a compressor housing and a rotating compressor shaft.