Section view of workings of hook and claw pump vacuum pump or blower

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As an illustration, with a 6kW motor power saving and a unit cost of $0.20 per kWh x 6hrs per day x 200 days per year, you achieve a saving of $1,440 per year!

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If you replaced the above pump with a dry running VCX 500 Hook & Claw vacuum pump without a variable speed drive, it would require 11kW motor power and deliver a flow rate of 4300 l/min. When you add the variable speed drive, you will achieve further motor power saving with the average adsorbed power diving as low as 9kW. Thats a huge saving of 6kWs per hour multiplied by your kWh unit price for every operational hour of your plant!

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These pumps do require protection from the ingestion of liquid (slugs) from wash down and process carryover. mbar Ltd can provide a proven process solution to eliminate this risk, ensuring maximum service life for your vacuum pump even in even the harshest environment.

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Hook & Claw pumps have pumping speeds from 1000 to 5000 l/min at -50kPa. These pumps can be used in harsh environments where water vapour content is high, due to a rugged simple design, an internal coating and high running temperature which ensures that vapour doesnt condense inside the pump.

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As an example, a Liquid ring vacuum pump installed with no variable speed drive has an adsorbed motor power of 15kW and a delivered flow rate of around 4000 l/min. A system with 4000 l/min flow requirement has a built in reserve capacity and is regulated by an adjustable vacuum regulation valve (bleeds in air from atmosphere) to maintain a constant vacuum level.

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All vacuum pumps in this industry are rated in free air at -50kPa vacuum level. Working vacuum levels are typically between -44 kPa through to -50kPa.

Claw pumps are energy efficient and in conjunction with the variable speed drives significant cost savings can be made.

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Quality Korean Hook & Claw vacuum pumps for the Dairy Farm industry in New Zealand

Korean manufactured Wonchang pumps are dry running (use no oil or water), compact and direct driven by high efficiency electric motors. The air suction volume is controlled via a variable speed driven motor which determines the volumetric flow delivered to the milking machine.