For over 80 years Sterling SIHI has maintained its position as a leading supplier of liquid ring vacuum pumps to a wide range of process and related markets. Close contact is maintained with customers to ensure that product development is geared to marketplace needs. This is supported by investment in “state of the art” manufacturing to promote consistent quality, competitive lead times and ensure competitive pricing.

in Compact Design:

  • Series LEM, LEL
  • Series SIHIextruvac LEME
  • Series SIHIsterivac LEMS

in Bare Shaft Design:

Suction Pressure up to 120 mbar

  • Series LOH
  • Series LPHX, LPH
  • Series SL

Suction Pressure up to 33 mbar

  • Series LOH
  • Series LPHX, LPH
  • Series LEH

DescriptionDetailsDocumentation

Series LOH

Liquid ring vacuum pumps of the series LOH are two-stage displacement pumps of uncomplicated and robust construction with the following particular features like handling of nearly all gases and vapoursnon-polluting due to nearly isothermal compressionoil-free (no lubrication in the working chamber), small quantities of entrained liquid can be handled, easy maintenance and reliable, low noise and nearly free from vibration, wide choice of material (therefore applicable nearly everywhere), incorporated central drain and no metallic contact of the rotating parts.

Applications:

Handling and exhausting of dry and humid gases. Entrained liquid can be handled during normal duty. The pumps are applied in all fields where a pressure of 33 to 900 mbar must be created by robust vacuum pumps. Fields of application are for example the chemical and pharmaceutical industry (distilling and degassing), the electric industry (impregnation and drying), the plastics industry (degassing) and many more.

Technical Data:

Suction volume flow: up to 60 m³/h

Suction pressure: 33 up to 1013 mbar
Shaft seal: gland packing, mechanical seal
Materials: grey cast iron, bronze, stainless steel

DescriptionDetailsDocumentation

Series LPHX, LPH

Liquid ring vacuum pumps of the series LPHX/LPH are single-stage displacement pumps and have a simple but robust construction with the following features and benefits like nearly isothermal compressionoil-free (no internal lubrication), capable of handling almost all gases and vapours, able to handle quantities of liquid “carry over”low maintenance and safe operation, low noise and almost vibration free, available in a wide range of materials, broad range of applications, O-ring sealing as standard, cavitation protection as standard, drain hole as standard, built-in solids drain and rotating metallic parts are non contacting to minimise wear.

Applications:

Handling and exhausting of dry and humid gases. Entrained liquid can be handled during normal duty. The pumps are applied in all fields where a pressure of 120 to 900 mbar must be created by robust vacuum pumps. Fields of application are for example the chemical and pharmaceutical industry (distilling and degassing), the electric industry (impregnation and drying), the plastics industry (degassing) and many more.

Technical Data:

Suction volume flow: up to 10,700 m³/h

Suction pressure: 120 up to 1013 mbar
Shaft seal: gland packing, mechanical seal
Materials: grey cast iron, stainless steel

DescriptionDetailsDocumentation

Series SL

Liquid ring vacuum pumps of the series SL are single-stage displacement pumps of uncomplicated and robust construction with the following particular features like handling of all gases and vapoursrobust operating behaviourinsensitive to entrained liquidslow noise level, nearly free from vibration, direct drive or belt drive, very little wear because of regular dirt drain (out of the pump) and application of steel as construction material, symmetrical design therefore optionally clockwise or anticlockwise operation by easy shifting of the shaft, no lubricant in the working chamber, compact design, small size, wide effective speed range from 800 to 1,600 rpm, weight-saving construction, leakage proof shaft seal and optionally special seal with radial shaft seal ring and gland packing ring or mechanical seal with bellows.

Applications:

The SL series is especially developed the use on waste disposal vehicles. The main requirements of vacuum pumping systems on waste disposal vehicles are short evacuation timelow weighthigh reliability and environmental compatibility. Quit operation is of particular importance, especially on vehicles working in urban areas.

Technical Data:

Suction volume flow: up to 3,080 m³/h

Suction pressure: 150 mbar up to 1.5 bar
Shaft seal: radial shaft seal ring, gland packing, mechanical seal
Materials: grey cast iron

DescriptionDetailsDocumentation

Series LOH

Liquid ring vacuum pumps of the series LOH are two-stage displacement pumps of uncomplicated and robust construction with the following particular features like handling of nearly all gases and vapoursnon-polluting due to nearly isothermal compressionoil-free (no lubrication in the working chamber), small quantities of entrained liquid can be handled, easy maintenance and reliable, low noise and nearly free from vibration, wide choice of material (therefore applicable nearly everywhere), incorporated central drain and no metallic contact of the rotating parts.

Applications:

Handling and exhausting of dry and humid gases. Entrained liquid can be handled during normal duty. The pumps are applied in all fields where a pressure of 33 to 900 mbar must be created by robust vacuum pumps. Fields of application are for example the chemical and pharmaceutical industry (distilling and degassing), the electric industry (impregnation and drying), the plastics industry (degassing) and many more.

Technical Data:

Suction volume flow: up to 60 m³/h

Suction pressure: 33 up to 1013 mbar
Shaft seal: gland packing, mechanical seal
Materials: grey cast iron, bronze, stainless steel

DescriptionDetailsDocumentation

Series LPHX, LPH

Liquid ring vacuum pumps of the series LPHX/LPH are two-stage displacement pumps and have a simple but robust construction with the following features and benefits like near isothermal compressionoil-free (no internal lubrication), capable of handling almost all gases and vapours, able to handle quantities of liquid “carry over”low maintenance and safe operation, low noise and almost vibration free, available in a wide range of materials, broad range of applications, O-ring sealing as standard, cavitation protection as standard, drain hole as standard, built-in solids drain and rotating metallic parts are non contacting to minimise wear.

Applications:

Handling and exhausting of dry and humid gases. Entrained liquid can be handled during normal duty. The pumps are applied in all fields where a pressure of 33 to 900 mbar must be created by robust vacuum pumps. Fields of application are for example the chemical and pharmaceutical industry (distilling and degassing), the electric industry (impregnation and drying), the plastics industry (degassing) and many more.

Technical Data:

Suction volume flow: up to 10,350 m³/h

Suction pressure: 33 up to 1013 mbar
Shaft seal: gland packing, mechanical seal, magnetic drive
Materials: grey cast iron, stainless steel

DescriptionDetailsDocumentation

Series LEH

Liquid ring vacuum pumps of the series LEH are single-stage displacement pumpsand have a simple but robust construction with the following features and benefits like near isothermal compressionoil-free (no internal lubrication), capable of handling almost all gases and vapours, able to handle quantities of liquid “carry over”low maintenance and safe operation, low noise and almost vibration free, available in a wide range of materials, broad range of applications, O-ring sealing as standard, cavitation protection as standard, drain hole as standard, built-in solids drain and rotating metallic parts are non contacting to minimise wear.

Applications:

Handling and exhausting of dry and humid gases. Entrained liquid can be handled during normal duty. The pumps are applied in all fields where a pressure of 33 to 900 mbar must be created by robust vacuum pumps. Fields of application are for example the chemical and pharmaceutical industry (distilling and degassing), the electric industry (impregnation and drying), the plastics industry (degassing) and many more.

Technical Data:

Suction volume flow: up to 5,150 m³/h

Suction pressure: 33 up to 1013 mbar
Shaft seal: gland packing, mechanical seal, magnetic drive
Materials: grey cast iron, stainless steel