Welch Vacuum 1407K-11 Duo Seal Oil, 1 Quart
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It's adequate for operation, though it's about 3 ounces short of reaching the top line.
Selected User Reviews For Welch Vacuum 1407K-11 Duo Seal Oil, 1 Quart
This was purchased to go with a Welch DuoSeal 1400 vacuum pump. I'm not sure what makes Welch oil so special, and I'm sure there's a generic replacement oil available for a lot less money from a petroleum product manufacturer. The product itself is fine, but the cost of the proprietary "blend" reduces it to a three-star rating. It gives me the impression that the company isn't concerned about the customer who paid a lot of money for a high-priced tool. Because residual droplets/vapors from the suction side's airflow can contaminate this oil, it must be changed on a regular basis. This means that the customer will incur ongoing costs, while the manufacturer will profit handsomely. The product, once again, is outstanding.
Welch only specifies this fluid as an option. Why risk your pump, your research, or other costly testing by switching to a different fluid for a few dollars?.
vacuum pump with a long life Stick with the same brand as the pump and don't mind paying a little more.
Excellent craftsmanship.
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