The proven Zacks Rank system focuses on earnings estimates and estimate revisions to find winning stocks. Nevertheless, we know that our readers all have their own perspectives, so we are always looking at the latest trends in value, growth, and momentum to find strong picks.

Of these, value investing is easily one of the most popular ways to find great stocks in any market environment. Value investors use a variety of methods, including tried-and-true valuation metrics, to find these stocks.

Luckily, Zacks has developed its own Style Scores system in an effort to find stocks with specific traits. Value investors will be interested in the system's "Value" category. Stocks with both "A" grades in the Value category and high Zacks Ranks are among the strongest value stocks on the market right now.

One stock to keep an eye on is SPX Flow (FLOW Quick QuoteFLOW - Free Report) . FLOW is currently holding a Zacks Rank of #2 (Buy) and a Value grade of A. The stock is trading with a P/E ratio of 16.34, which compares to its industry's average of 16.78. Over the past year, FLOW's Forward P/E has been as high as 38.72 and as low as 15.41, with a median of 18.57.

Investors should also recognize that FLOW has a P/B ratio of 1.93. The P/B is a method of comparing a stock's market value to its book value, which is defined as total assets minus total liabilities. This company's current P/B looks solid when compared to its industry's average P/B of 4.70. Over the past 12 months, FLOW's P/B has been as high as 2.43 and as low as 1.57, with a median of 1.94.

Finally, investors should note that FLOW has a P/CF ratio of 13.71. This metric takes into account a company's operating cash flow and can be used to find stocks that are undervalued based on their solid cash outlook. FLOW's P/CF compares to its industry's average P/CF of 19.82. Over the past year, FLOW's P/CF has been as high as 21.48 and as low as 12.84, with a median of 17.68.

These are only a few of the key metrics included in SPX Flow's strong Value grade, but they help show that the stock is likely undervalued right now. When factoring in the strength of its earnings outlook, FLOW looks like an impressive value stock at the moment.