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DOLPHIN LB 0265–0425 A

Our Dolphin LB range of liquid ring two-stage vacuum pumps are well suited for wet and corrosive applications. They combine the benefits of high efficiency from a compact rugged machine, and reduced running cost from a competitive product.

Features

  • Suction capacity from 38 cfm to over 2500 cfm
  • Ultimate pressure of 25 torr (29 HgV)
  • Available in a wide range of materials
  • Minimal moving/contacting parts allowing ease of service and
    maintenance
  • Single mechanical seals standard
  • Low vibration and noise level
  • Reliability
  • ANSI flanges and NEMA motors
  • Some models are directly interchangeable with other brands
  • Low heat emission
  • Oil free discharge

Dolphin – robust and compact. Ideal for difficult applications.

Dolphin – robust and compact. Ideal for difficult applications.

Would you like to know more?
Contact us directly (Busch United States):
1-800-USA-PUMP Get in contact

Technical Specifications

Technical specifications
Liquid ring pumps operate with only one moving part, the impeller shaft assembly. The impeller is mounted eccentrically relative to it’s casing. The liquid ring is formed by the service liquid (normally water) rotating concentrically in it’s casing. Process gas enters through the suction port, travels between the impeller blades and is compressed prior to exhausting through the discharge port along with a quantity of service liquid.

Available Options

  • Various materials of construction including 316 stainless steel,
    bronze, etc...
  • Base plate or pedestal mounting configurations
  • IEC motors
  • Metric connections
  • System configurations (once through, partial recovery, and
    total recovery)
  • Outboard bearing in place of standard inboard bearing
  • Packed gland seal or double mechanical seal


System Configurations
1. Once Through System - No Recovery

The service liquid comes from a fresh supply, passes only once through the pump and is discharged to an open drain.

2. Partial Recovery System
Within this system the service liquid is discharged to a vessel which allows separation of the gas and liquid. A portion of the discharged liquid is returned to the pump’s service fluid inlet together with a fresh liquid supply. This reduces the amount of fresh liquid required.

3. Total Recovery System
This system provides for total recirculation of the service liquid and is preferable when liquid is in short supply or where there is a risk of contamination. A heat exchanger is added to the system to remove the heat of compression prior to re-use of the service liquid.

Dimensional Drawing DOLPHIN LB 0265 - 0425 A
DOLPHIN LB 0265 - 0425 A
Pumping speed

Air at 70 ºF. Tolerance: ± 10%

60 Hz
Pumping speed
Technical data DOLPHIN LB 0265 A DOLPHIN LB 0355 A DOLPHIN LB 0425 A
Nominal pumping speed 193 ACFM 245 ACFM 295 ACFM
Ultimate pressure 25 Torr 25 Torr 25 Torr
Nominal motor rating 20 HP 20 HP 25 HP
Nominal motor speed 1750 RPM 1750 RPM 1750 RPM
Noise level (ISO 2151) 75 dB(A) 75 dB(A) 75 dB(A)
Weight approx. 342 Lbs. 377 Lbs. 397 Lbs.
Dimensions (L x W x H) 35 3/8 x 11 13/16 x 20 ½ inches 37 11/16 x 11 13/16 x 20 ½ inches 39 5/16 x 11 13/16 x 20 ½ inches
Gas inlet / outlet (ANSI) 2" / 2" inches 2" / 2" inches 2" / 2" inches

Technical Specifications

Technical specifications
Liquid ring pumps operate with only one moving part, the impeller shaft assembly. The impeller is mounted eccentrically relative to it’s casing. The liquid ring is formed by the service liquid (normally water) rotating concentrically in it’s casing. Process gas enters through the suction port, travels between the impeller blades and is compressed prior to exhausting through the discharge port along with a quantity of service liquid.

Available Options

  • Various materials of construction including 316 stainless steel,
    bronze, etc...
  • Base plate or pedestal mounting configurations
  • IEC motors
  • Metric connections
  • System configurations (once through, partial recovery, and
    total recovery)
  • Outboard bearing in place of standard inboard bearing
  • Packed gland seal or double mechanical seal


System Configurations
1. Once Through System - No Recovery

The service liquid comes from a fresh supply, passes only once through the pump and is discharged to an open drain.

2. Partial Recovery System
Within this system the service liquid is discharged to a vessel which allows separation of the gas and liquid. A portion of the discharged liquid is returned to the pump’s service fluid inlet together with a fresh liquid supply. This reduces the amount of fresh liquid required.

3. Total Recovery System
This system provides for total recirculation of the service liquid and is preferable when liquid is in short supply or where there is a risk of contamination. A heat exchanger is added to the system to remove the heat of compression prior to re-use of the service liquid.

Dimensional Drawing
DOLPHIN LB 0265 - 0425 A
DOLPHIN LB 0265 - 0425 A
Pumping speed

Air at 70 ºF. Tolerance: ± 10%

60 Hz
Pumping speed
Technical data DOLPHIN LB 0265 A DOLPHIN LB 0355 A DOLPHIN LB 0425 A
Nominal pumping speed 193 ACFM 245 ACFM 295 ACFM
Ultimate pressure 25 Torr 25 Torr 25 Torr
Nominal motor rating 20 HP 20 HP 25 HP
Nominal motor speed 1750 RPM 1750 RPM 1750 RPM
Noise level (ISO 2151) 75 dB(A) 75 dB(A) 75 dB(A)
Weight approx. 342 Lbs. 377 Lbs. 397 Lbs.
Dimensions (L x W x H) 35 3/8 x 11 13/16 x 20 ½ inches 37 11/16 x 11 13/16 x 20 ½ inches 39 5/16 x 11 13/16 x 20 ½ inches
Gas inlet / outlet (ANSI) 2" / 2" inches 2" / 2" inches 2" / 2" inches

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DOLPHIN LB 0265–0425 A

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