Is this line correct?

Yes, your sentence is fine.

. . . of the competitor’s price..

I would say
. . . of the competing product's price.

Unless Vent Check Valve is the official name of your product, don' use capitals.

Clive

viswanath89 I have developed a Vent Check Valve which can be manufactured for 70% of the competitor’s price.

The meaning is not clear. Do you mean 70% of the competitors cost or selling price?

AnonymousThe meaning is not clear. Do you mean 70% of the competitors cost or selling price?

Competitors don't usually share/divulge information about their costs.

teechrCompetitors don't usually share/divulge information about their costs.

But "manufactured for" implies costs.

"can be sold for" (or some such phrase) would imply prices.

CJ

viswanath89 I have developed a Vent Check Valve which can be manufactured for 70% of the competitor’s price.

Here's my try at it:

I have developed a vent check valve that can be manufactured for 70% of the competitor's cost(s).
OR
I have developed a vent check valve that can be sold for 70% of the competitor's price.

CJ