Note

By continuously feeding the pump with a small amount of service

liquid (usually water), the heat due to gas/vapour compression is

conducted away. This also replenishes the liquid ring and ensures

that it does not become saturated with process media. Recharging

the pump with service liquid at ambient temperature enables the

unit to condense evacuated gases / vapours. It can therefore be

used for solvent recovery. The condensed gas and liquid can be

separated in a liquid separator. More information is provided in the

accessory catalogues.

The integrated solids drain permits the removal of any entrained

solids whilst the pump is operating. The service liquid can therefore,

simply be re-circulated. The rotation of the pump is clockwise when

viewed from the drive end.

Liquid Ring Vacuum Compressors
SIHI Liquid Ring Compressors compress gases from a lower pressure to a higher pressure. Almost all gases and vapours can be compressed, even those containing dust and liquids. Due to the intensive contact between the gas being conveyed and the operation fluid, there is only a very slight rise in the temperature of the gas being conveyed, so that one can almost describe it as an isothermal compression.

Technical Data 
Suction volume flow: up to 11,553 m³/h 
Suction pressure: up to 11 bar 
Product Series Single Stage: LOH / LPHX / LPH / KPH / KPHC / KPHV 
Product Series Two Stage: LOH / LPHX / KPH / KLH

Design 
SIHI Liquid ring compressors are of simple and robust construction. They have the following important features like handling of nearly all gases and vapours, non-polluting due to nearly isothermal compression, oil-free (as no lubrication in the working chamber), additional liquid can be handled with the gas flow, easy in maintenance and reliable operation, low noise and nearly free of vibrations, wide choice of material (applicable nearly everywhere) and no metallic contact of the rotating parts.

SIHI Dry Running Vacuum Pumps
The SIHIdry vacuum pump is a vertical twin-screw machine that is completely dry running and has no mechanical shaft seals. Moreover, the hermetically sealed unit has been developed specifically to meet these demands, whilst maintaining a simple, cost-effective solution.

Technical Data 
Suction volume flow: up to 1,000 m³/h 
Suction pressure: < 0.001 up to 1013 mbar 
Product Series Chemical Execution: M / H 
Product Series Industrial Execution: V / S

Design 
SIHIdry is based upon the dry running twin screw principle. The screw-shaped displacing bodies counter-rotate without contact. The pump inlet is at the top and the outlet at the geodetically lowest position (top-down pumping). In contrast to conventional pumps the both screw spindles are not mechanically but electronically synchronized. This innovative drive conception is the basis for a stepwise development of the vacuum pump to an intelligent vacuum system, which takes on additional functions as the valve-, and pressure control for example. Furthermore the intelligent system offers the possibility to exactly monitor the important process data in order to ensure a maximum of process safety.

We supply SIHI Pump in Malaysia, Indonesia, Thailand, Hong Kong, China shanghai etc.