FRANKFURT — A growing number of Germans may want to see the euro zone dissolve, but Dagmar Bollin-Flade, owner of a small machinery company here, is not among them. Like many German businesspeople, she is keenly aware of the economic benefits of a common currency — and willing to pay a price to keep the eurointact.

“All those who say, ‘We want to get out of the euro’ — they don’t remember how it was,” Ms. Bollin-Flade said.

Her company, Christian Bollin Armaturenfabrik, belongs to the country’s vast swath of small and medium-size companies that are known as the Mittelstand and account for 60 percent of German jobs. Most feel no nostalgia for the days when they and their customers had to keep an eye on the value of a dozen European currencies, a time when the German mark sometimes became so strong that it threatened to price them out of foreign markets.

Amid loose talk about letting Greece leave the euro, or even reintroducing the mark, German business leaders are often the ones reminding the public what the economic consequences might be. Markus Kerber, president of the Federation of German Industry, last week called for more European integration and criticized what he said was “persistent political indecisiveness and disunity” that has undermined trust in the euro.

More than most, the Mittelstand has benefited from the euro, which has made it easier for small companies to behave like multinationals. Bollin, with about 30 employees in a small factory, sells its specialty shut-off valves to customers in China and around Europe.

So far, companies like Bollin have endured the euro zone debt crisis remarkably well. Ms. Bollin-Flade said she has not seen any effect on sales. But she and her peers are concerned about the future. In a poll commissioned this year by the industry federation, the number of Mittelstand companies that expected business to improve in the next 12 months slumped, while the number expecting a turn for the worse soared.

Ms. Bollin-Flade, who was one of about 10 businesspeople invited to discuss Mittelstand issues with Chancellor Angela Merkel in her office last year, said she supported the German leader’s strategy of insisting that financial aid be granted to troubled euro zone countries only if they show more fiscal discipline and economic reforms.

“We should get something in return,” Ms. Bollin-Flade said.

What people like her think is important. While companies like BMW and Siemens spring to mind when people think of German business, the Mittelstand is arguably the soul of the German economy, and also reflects many of the values that Germany is known for.

In fact, the Germany economy sometimes resembles one big Mittelstand company: it is built for stability more than growth. Debt is bad, prudence a higher virtue than profit.

That characteristic often frustrates Germany’s neighbors, as well as some economists, who wish Germans would spend more to stimulate growth in the rest of the euro zone. But Germans argue that their approach has helped the country avoid downturns like those that have hit Spain and Italy and are threatening France. While Greece was racking up debt during the last decade, Mittelstand companies were resolutely cutting theirs, according to data from the Institute for Mittelstand Research in Bonn.

“They want to increase their independence from banks and external financing,” said Christoph Lamsfuss, an economist at the institute. “They want to make sure that the next generation inherits a solid company. In the final analysis that is good for the German economy.”

Companies like Christian Bollin Armaturenfabrik, named for Ms. Bollin-Flade’s grandfather, who founded the maker of specialized valves in 1924, will play an important supporting role in determining how much the German economy will continue to provide a crucial counterweight to the recession in Southern Europe.

Data scheduled to be released Tuesday is expected to show that the German economy continued to grow modestly in the second quarter of this year. Not so the euro zone as a whole, which had zero growth in the first quarter and was unlikely to have shown growth in the second. France may join Spain, Italy and several other euro zone countries that have experienced declining output.