Vertical-horizontal-water-tube water heating boilers →

• - vertical arrangement of pipes of small diameter (with this arrangement, there is much less deposits in the pipes than with horizontal ones).
• - water-tube screening of the combustion chamber reduces the specific material consumption compared to horizontal water-tube boilers.

Vertical water tube hot water boilers are heating class boilers. These include:

• - steel sectional boilers of types “NR” (Fig. 3.33), “NIISTU”, “ZIO”, etc.;
• - steel monoblock boilers of the “KVA” (Fig. 3.34), “KV-G”, “TVG” types, etc.

Sectional boilers are assembled locally. Monoblock units are supplied assembled and ready for use. Technical characteristics of vertical water tube hot water boilers are given in table. 3.15-3.18.

Rice. 3.33. Vertical water tube water heating boiler NR-18 (steel sectional):

1 – hatch cover for cleaning; 2 – partition made of refractory brick; 3 – pipe section; 4 – gas duct.

Steel sectional boilers operate under vacuum due to the natural draft created by the chimney.

Steel sectional boilers are designed to heat water to a temperature not higher than 115 0C. Sections of the HP-18 boiler are welded from three pipes D 89 mm (vertically installed pipes, Fig. 3.33) and one pipe D 108 mm (manifold), into which vertical pipes are welded at the top and bottom. The inner row of pipes is separated from the other two rows by a vertical partition made of refractory bricks, forming the radiation (side screens) and convective parts of the boiler. From the firebox, high-temperature combustion products flow through the opening into the convective part of the boiler. Going down the convective part, the combustion products enter the flue - 4. From the flue, the cooled combustion products go into the chimney. Steel sectional boilers operate on solid, liquid and gaseous fuels.

Table 3.15. Technical characteristics of vertical water-tube hot-water boilers of the following brands: “NR”, “Nadtochiya”, “NIISTU” (steel sectional).

Boiler type	Number of sections	Heating surface area, m 2			Specific heat removal, Mcal/(m 2 ×h)	Gas consumption, m 3 / h
		boiler	middle section	front section
NR-17	24	40	1,67	-	10	59
NR-18	16-32	27-53	1,67	-	10	38
NR-18M	-	74	-	-	16	163
"Points"	3-6	20-47	9	2	12	34-80
"NIISTU-5"	4-7	25-46	7,1	5,5	12	42-78

The efficiency of these boilers is in the range of 80-85%

Table 3.16. Technical characteristics of vertical water tube hot water boilers of the ZIO-MG brand.

Rice. 3.34. Vertical water tube boiler – KVA (monoblock)

1 – boiler body; 2 – embrasure; 3 – flue box; 4 – burner; 5 – pipe system.

Boilers of types “KVA”, “KV-G”, “TVG” operate under excess pressure. Excessive pressure is created by air supplied by a blower fan and fuel entering the burner from the fuel distribution device. In the burner, fuel and air are mixed and the entire air-fuel tract operates under pressure. The fireboxes of these boilers are formed by the inner walls of the boiler tube system. The gas tightness of the combustion chambers is ensured by welded membranes installed in the gaps between the pipes. The pipe system is designed to heat water and organize the movement of combustion products in the interpipe space (flow around the heat transfer surface). The pipe system forms the radiation-screen and convective parts of the boiler. The pipe system consists of two annular collectors connected to each other by straight vertical pipes located along several concentric circles in a checkerboard pattern. The upper and lower collectors have stamped tube sheets to which pipes are welded. Ring collectors are usually covered with removable covers.

Table 3.17. Technical characteristics of vertical hot-water water tube boilers “KVA” (monoblock).

Parameter name	KVA-0.4/95	KVA –1.0/95
Nominal heating capacity, MW Fuel type Maximum water temperature at the outlet of the boiler unit, o C Inlet water temperature, o C Maximum working pressure(absolute), MPa Boiler efficiency, % Flue gas temperature, o C Hydraulic resistance of the boiler, MPa Pressure in the furnace, Pa, no more Gas pressure, kPa Burner model Nominal water flow, m 3 / h Temperature of the outer surface of the boiler, o C, no more Weight without burner, kg, no more Boiler height, N, mm	Natural gas 95 ± 2 70 ± 2 GGV-50 ~ 1100	Natural gas 95 ± 2 70 ± 2 GGV-150 ~ 1440

Table 3.18. Technical characteristics of vertical water-heating water-tube boilers “KV-G” (monoblock).

The disadvantages of monoblock boilers include high thermophysical and thermal stresses that arise in the inter-tube membranes. In order to maintain gas tightness, non-stop operation is preferable for boilers of this type.

We deliver equipment in any way convenient for you - by trucking companies, our own by road transport, by railroad. We DO NOT deliver equipment by Russian Post and the luggage department of Russian Railways, and we also do not transfer equipment to train conductors, bus drivers, etc.

Loads over 5 kg:

• Delivery in Moscow
• Delivery cost in Moscow is 500 rubles. Delivery times and times are agreed upon when ordering.
• Delivery of large-sized cargo (for example, KCHM boilers) in the Moscow region: delivery to the region is 500 rubles + 30 rubles for each kilometer from the Moscow Ring Road. The cost of delivery depends on the order amount and can be free regardless of the distance.
• Delivery throughout Kaluga and the region
• Delivery within Kaluga is free.
• Delivery to the region is free for the following settlements: Kirov, Baryatino, Mosalsk, Obninsk, Maloyaroslavets. To the rest settlements delivery is coordinated with the managers of the Kaluga branch of the company.
• Delivery to regions of Russia
• Delivery to the regions is carried out by road transport companies and our own vehicles. Shipment to any car transport company in Moscow - FREE!
• Delivery is carried out, if possible, to your city. If it is impossible to deliver to a certain city, delivery is carried out to the nearest possible. You can also indicate a specialized transport company that has a representative office in Moscow and carries out cargo transportation to your city - delivery of equipment in Moscow to your transport company will be free.

Load less than 5 kg:
Delivery in Moscow and regions of the Russian Federation

Delivery is carried out by the SDEK courier service according to the “hand to hand” scheme from Monday to Friday from 10-00 to 18-00. By separate agreement with the operator, delivery can be made at other times, as well as on weekends. Delivery is carried out during the day, or at your request in the first (from 11-00 to 14-00) or second (from 14-00 to 18-00) half of the day. Also, for your convenience, we can offer evening delivery (negotiated with the operator personally).

Payment is made directly to the courier at the time of transfer of the order; if something does not suit you, you can refuse the order partially or completely.

We kindly ask you not to delay the courier at your address for more than 20 minutes. If it is impossible to transfer the order to the recipient within 20 minutes of being at his address, the courier has the right to leave the customer’s address to ensure timely delivery of orders to other customers. We strongly recommend that you provide uninterrupted operation the contact telephone numbers you provided.

30-60 minutes before your visit, the courier will contact you and inform you exact time arrival. Our couriers do not go to the customer’s address without a preliminary call to the customer.

The company SDEK (Express Courier Delivery Service) has been on the market for more than 11 years and delivers cargo and documents to more than 2,000 cities throughout Russia and the world. Courier service deals with express delivery, cargo transportation, delivery of flowers, gifts, mailing around the city.

The client is given the opportunity to track the delivery process on the company’s website. SDEK provides services to online stores, including delivery of goods to the buyer using a specially developed delivery module, as well as accepting cash on delivery.

Payment for ordered equipment

Payment for the ordered equipment is made in any way convenient for you:

• At courier delivery(Moscow and Moscow region, Kaluga and Kaluga region) - cash/non-cash payment
• Delivery to the regions via trucking companies - cashless payments