Нужен ли обратный клапан на рециркуляции?

Let's try to answer the question: is a check valve in a recirculation loop necessary or can it be dispensed with? As is often the case, there's no clear answer. Those who claim a check valve is essential are wrong. In most cases, its use is useless and even harmful. But there are systems where it's simply indispensable. So let's figure out when it's necessary and when it's absolutely necessary. The largest project in engineering systems: heating, water supply, electrical, ventilation, and air conditioning. Consultations and project orders: +7 (495) 411-411-3, +7 (916) 990-90-90 Advertising, integrations, and other creative services: +7 (903) 762-042-84 Website: http://www.teplowoda.ru/ Facebook:   / teplowoda1   VK: https://vk.com/club77517367 Website: http://www.teplowoda.ru/ VK: https://vk.com/club77517367 Telegram: https://t.me/teplowoda Facebook:   / teplowoda1   Zen: https://dzen.ru/id/5fd8d6670e30e806cd... Rutube: https://rutube.ru/channel/30591681/