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Scheme of operation of the heating bypassWhy do I need a bypass in the heating system?
Let's define right away - for modern heating boilers, the installation of a bypass is usually irrelevant - they are not designed to operate in the mode of natural circulation of the coolant and the main mode of operation is the pumping of the coolant by a circulation pump, structurally installed by the manufacturer in the boiler itself. Therefore, in general, a bypass will be useful for those who have natural circulation heating installed in the house (the so-called classical gravity heating systems) and who want to reduce heating costs by installing a circulation pump.

We offer industrial production of brass parts on order in Ukraine.


What gives us the installation of a bypass with a circulation pump?

  1. First of all - savings in fuel consumption, and, accordingly, savings. Since in systems with natural circulation, the movement of the coolant is based on the difference in the mass of warm water (it goes up) and cooling water (it goes down), rather large energy costs are required to “initial push” and maintain even minimal circulation. With a pump, this system can operate at a minimum water temperature, while the bypass does not allow it to go in a small circle, as this is blocked by a brass check valve with a rubber ball.
  2. The heating system heating rate, and, accordingly, the premises, with a circulation pump is much higher due to the small temperature difference in the supply and return lines.
  3. If you add a control thermostat to the circulation pump, you get the opportunity to maintain the set temperature of the heating system within certain limits.
  4. The bypass system allows the pump to be dismantled for replacement or repair without draining the heating system.


But like everything else, there is a “fly in the ointment” - the heating system begins to depend on the presence of voltage in the network to power the pump - and how will the heating work in the event of a power outage?
(which is not uncommon for us - this is especially important during the heating season, as it threatens to overheat the boiler). The solution to this problem is the bypass , which, when the power to the pump is turned off ( the pump in this state only creates circulation resistance ), allows you to automatically open the direct flow of the coolant along the main line and thereby ensure the usual natural circulation of the coolant. When the power supply appears, the operation of the forced circulation heating system will be restored automatically - this is one of the main advantages of bypasses with a brass check valve - there is no need to manually open / shut off the supply line ( imagine that if you were not at home during a power outage!? )

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The STA company has developed and offers return valves with a diameter of 40 and its own original design for manufactured heating bypass systems, which has the following advantages over analogues on the market:

  1. The body of the check valve is made by forging from LS-59 brass , due to which it has a low weight with high strength, good corrosion resistance. Analogues on the market are at best made of cast iron (it is heavier and has greater resistance to flow due to the rough inner surface), aluminum (which is less durable and quickly destroyed by electrolytic processes - especially in conventional steel heating systems) or plastic, which loses strength , tightness and thermal stability when heated.
  2. The body is processed on CNC machines, which ensures high accuracy and surface finish.
  3. The body and nut of the bypass check valve are connected by a thread glued with a special heat-resistant adhesive, which guarantees the tightness and integrity of the connection.
  4. The control element of the valve is a ball made of special rubber, which has the property of increased buoyancy, which allows heated water to freely lift it above the valve seat.

STA is ready to offer you both bypasses with diameters of 40 and 50mm, ready for installation in the heating system, and original brass check valves for bypasses of the corresponding diameters - see the prices for the check valve here

Reference: The name BYPASS comes from the English word bypass (literally - " parallel supply "), which is a highway laid in parallel or bypassing some other section of the system (for example, in water supply, heating, etc.). Most often, a bypass is used in situations where it is necessary to turn off any device of the system without interrupting its operation, as well as to regulate the required flow rates through this device, for which shut-off and control valves ( ball valves and valves ) are mounted on the bypass. When assembling the bypass, you need to pay attention to the diameter of the supply pipe - it must be at least a size smaller than the supply and return pipes (in order for the fluid to flow along the path of least resistance).

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Contacts LLC "STA" (Kharkiv)

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    Address : Ukraine 61105 Kharkiv
    39 Geroev Stalingrada Ave.
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    Tel/fax: +380577212140
    Mob/tel. : +380961790972

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