D-20 draft machines are widely used to work with boilers / boiler units with balanced draft, helping to organize a stable supply (blowing) of air into their furnaces. They are included in the package of steam boilers with a capacity of 1 ... 25 tons of steam per hour and gas-oil boilers with a heat capacity of 0.5 ... 16 Gcal per hour. In addition, their use is practiced in conjunction with technological installations, where they move ordinary air, and with gas-oil boilers for smoke removal.

From a constructive point of view, HP fans are designed for long-term uninterrupted operation in regions with a temperate climate, at external temperatures of -30 ... +40 degrees. VD and D smoke exhausters can be placed indoors or outdoors (with protection from atmospheric precipitation). According to the requirements of state standards, the placement of VD is carried out according to the 2nd category. It is possible to extend their service life if the engines are started only if the temperature regime is observed: the temperature inside the housing should not be below -30 degrees at this moment. The maximum allowable temperature level of the moved air flows is +200 degrees.

Centrifugal smoke exhausters D are effectively used to remove smoke from the furnaces of oil and gas boilers or boiler units with ash collecting systems. Unlike HP fans, smoke exhausters D are operated with placement in categories 1-4, their wear resistance and reliability are increased by thickening the walls of the housings. Temperature regime the same: ambient air -30 ... +40, inside the case - up to -30, transported medium - no more than +200 degrees.

The most popular, frequently requested models of draft machines:

• fans VD 2.5; ID 2.7
• boiler smoke exhausters D 2.7; D 3.5

Smoke exhausters D-20 are always available in the warehouses of the plant

Draft draft machines of the VD and D type are produced in right and left rotation. With right rotation, the wheel rotates clockwise, if you look at the wheel from the side of the electric motor, with left rotation - counterclockwise.

The volute of VD and D machines is manufactured with a turning angle from 0° to 270° every 15°, while the ribs of the volute that interfere with the installation are cut.

Smoke exhauster D-20 is a single suction centrifugal draft blower designed to remove flue gases from the furnaces of various boiler units equipped with ash collecting systems and to extract flue gases from oil-gas boilers.
No. 20 - means that the impeller has a diameter of 20 decimeters (2000 mm).
The number of blades - 32, forward curved.
Wheel rotation direction - right or left.
The body is manufactured with an exhaust angle from 0° to 270°, with an interval of 15°.

Standard version in moderate climatic version (U), placement category 2 (GOST 15150-69). Machines are used both indoors and outdoors (under a canopy). Ambient temperature from -30°С to +40°С. It is possible to manufacture in non-standard design ()

D-20 smoke exhausters are produced in two schemes (versions):

Scheme 3 (version 3)- the impeller of the smoke exhauster is connected to the electric motor through the bearing assembly by means of an elastic sleeve-pin coupling.
Scheme 5 (version 5)- the impeller of the smoke exhauster is located on the shaft of the bearing assembly. The shaft of the bearing assembly is connected to the electric motor by a V-belt transmission, which allows changing the speed of the impeller by means of pulleys.

Specifications (scheme 3)

electric motor		Parameters in the working area		Weight, kg scheme 3, without motor
Power, kW	Rotation frequency, rpm	Performance, m 3 / h	full pressure, Pa
315	750	180000	9350	4290

Hull angles(view from the engine side)

Left turn

Right turn

Overall and connecting dimensions of smoke exhausters D-20 scheme 3 (in mm)

	A1				b1					E	C	L1	L2	t1	t2	T1	N2
3128	1944	964	3418	1215	1948	2000	21,5	3080	1670	750	1170	892	338	140	140	840	1260

Smoke exhausters of the D-20 type - centrifugal, one-sided suction, are installed for exhausting flue gases from the furnaces of boiler units with a steam capacity of 4-160 t / h, equipped with efficient operating systems ash collection.

It is allowed to use smoke exhausters D-20 in technological installations for moving non-aggressive gases with dust content of solid particles up to 2 g/m 3 .

Smoke exhausters D-20 are designed for long-term operation at inlet gas temperatures up to 250°C indoors and outdoors in temperate climates (climatic version U, placement category 1, 2, 3 and 4, GOST 15150-69).

Smoke exhausters D-20 (Fan D-20) are produced for general industrial purposes - from carbon steel of ordinary quality, or from stainless steel.

Smoke exhauster type D-20: Design, Description

D-20 smoke exhausters (D-20 fan) for a copper make the right and left rotation. Clockwise rotation of the impeller is considered right when viewed from the motor side.

All single suction smoke exhausters are made with a cantilevered impeller. Depending on the number of the smoke exhauster with detachable or one-piece housings.

By their design, D-20 smoke exhausters are identical with VD fans and differ in the presence of an armor plate along the generatrix of the fan snail and linings at the impeller blades.

Single suction smoke exhausters D-20 can be installed according to one of the installation schemes.

Fans are driven by electric motors. The connection of the fan with the electric motor is carried out through the bearing assembly by means of an elastic pin-sleeve coupling.

Productivity, pressure, power consumption and efficiency of smoke exhausters in all modes are determined by aerodynamic characteristics.

Technical characteristics of the smoke exhauster D-20

Standard sizes of one-sided suction fans VD, for the complete set of smoke exhausters of type D

The fan factory "Ukrventsystema" produces single-inlet HP fans of the following sizes:

• Fan D-20
• Fan D-18
• Fan D-15.5
• Fan D-13.5
• Fan D-12
• Fan D-10
• Fan D-8
• Fan D-6

Hull Position Diagram

The fan volute is manufactured with a turn angle from 0° to 270° every 15°

Technical characteristics of smoke exhausters D-20

Series D smoke exhausters	Estimated t movable environment, C		Characteristics of smoke exhausters				Weight not over, kg
		Size el. engine	Produc- validity Qmin, thousand m³/h	Produc- validity Qmax, thousand m³/hour	Complete pressure Pv min, Pa	Complete pressure Pv max, Pa
D-20 (200 kW 600 rpm) version 3	200	355MLB10	58,0	185,0	2200	2580	5400
D-20 (400 kW 750 rpm) version 3	200	–	50,0	207,0	3400	3950	–

Aerodynamic characteristics of the smoke exhauster D-20

dimensions

smoke exhauster number

A, mm

D, mm

D1, mm

F1, mm

F2, mm

F3, mm

F4 mm

F5, mm

F6 mm

H, mm

Lmax, mm

L, mm

L1, mm

D 20 isp 3

1215

1400

1500

1170

750

1260

840

1260

840

622/1048

–

564

446

smoke exhauster number

L3, mm

S, mm

d, mm

d1, mm

d2, mm

f1, mm.

f2, mm.

h, mm.

n, pcs.

n1, pcs.

n2, pcs.

n3, pcs

n4, pcs

D 20 isp 3

142,5

940

21

21

40/36

140

140

1410

24

20

6

9

4/8

Description

To use any boiler safely, it must be equipped with equipment that will balance the draft. Such devices are called smoke exhausters.

Smoke exhausters of the D-20 series

Boiler smoke exhausters D-20 can be used for all types of boilers, except for electric ones. Smoke exhausters of this series are capable of transporting gas-air media with temperatures up to +250 degrees.

They not only remove combustion products, but also provide one-way traction. Therefore, this equipment is actively used at thermal power plants, in enterprises of the foundry and metallurgical industries, boiler houses of public and private institutions, in greenhouses and private homes. They are also supplied with metallurgical furnaces.

Execution schemes

Exists two versions, which depend on the tool size. They differ from each other in the way the impeller is attached.

• Execution 3 (scheme 3): The wheel is mounted on the motor shaft through the bearing unit

• Execution 5 (diagram 5): The wheel is mounted on the motor shaft through a belt drive

Peculiarities

The boiler smoke exhauster D No. 20 is a radial, one-sided suction fan.

Its structure:

• the outlet pipe is a volute in the form of a spiral casing, where vortex flows are created;

• an impeller that creates a vacuum in the cochlea due to rotation;

• an electric drive with an asynchronous three-phase motor that drives the impeller;

• welded support for electric drive.

Case type - spiral rotary.

The main feature is that the blades of the smoke exhauster are bent forward to ensure direct draft.

Smoke exhausters D-20 are made as the right, and left rotation. Production of the smoke exhauster in corrosion-resistant execution is possible.

Important! Smoke exhausters D-20 are designed for use in temperate climates.

Payment and delivery

Delivery in Moscow and Moscow region

• With an order amount of 25,000 ₽, delivery within Moscow and the Moscow region is carried out by our own vehicles free of charge

• With an order amount up to 25 000 ₽, the cost of delivery is calculated individually

• Delivery is carried out within 1-3 days from the moment your order is ready.

• Pickup is carried out from the warehouse: Moscow, Pakgauznoe highway, 6

Delivery across Russia

Delivery to Kazakhstan, Belarus and countries of the customs union

We deliver ventilation equipment to Kazakhstan, Belarus and the countries of the Customs Union. When sending through transport companies, only transportation from Moscow to your city is paid, the cost of transportation is low, because transport companies carry groupage cargo.

• Free delivery to the TK terminal is carried out regardless of the amount of the order

• Services transport company customer pays

• Upon request, we will select a carrier and calculate the delivery based on price and quality

Hardware warranties

• Warranty for equipment supplied by our organization 12 to 48 months

Connection

Preparing the fan for operation and operating procedure

1. Mounting

1.1 Installation of the fan must be carried out in accordance with the Rules for the design, installation and safe operation general industrial fans.

1.2 Before mounting the fan, it is necessary to carry out an external inspection. In case of detection of damage, defects resulting from improper transportation and storage, putting the fans into operation without agreement with the manufacturer is prohibited. In order to prevent imbalance, it is forbidden to dismantle rotating parts without the consent of the manufacturer.

Connect the motor according to the diagram shown on inside covers of the electric motor terminal box, following all the recommendations of the Electric Motor Operation Manual, as well as the Rules for the Design and Operation of Electrical Installations and sample instructions on labor protection during the operation of electrical installations.

1.3 During installation it is necessary:

• inspect the fan, air ducts (if any);

• make sure that the impeller rotates easily and smoothly (without touching and jamming).

  check the reliability of the connections of the conductive cable to the terminals of the terminal box;

2. Start

2.1 Before starting, make sure that there are start-up protection devices (ROM), check that the thermal relay setting matches the rated current of the motor winding.

It is forbidden to use the fan in the absence of start-up protection devices (ROM), or if they do not correspond to the rated current of the motor winding.

2.2 Before start-up, it is necessary to inspect the fan, air ducts (if any), the installation site, make sure that there are no foreign objects inside and notify the personnel about the fan start-up.
2.3 When starting the fan and during its operation, all actions on the air ducts and near the fan itself (inspection, cleaning) must be stopped.
2.4 Close the throttling device (guide apparatus, damper, valve, etc.);

It is forbidden to start the fan that is not connected to the air duct network or with an open throttling device.

2.5 To check the operability of the mounted fan, a test run is performed. Check the direction of rotation by briefly switching on the motor, if necessary change the direction of rotation by switching the phases at the motor terminals.
2.6 Turn on the engine, after reaching the nominal speed, gradually open the throttling device until the design parameters of the fan are reached; measure the current in each winding of the electric motor: the current should not exceed the nominal value indicated on the nameplate (nameplate) of the electric motor or in its passport.

Do not exceed the rated current of the motor windings Inom for the used mains voltage, indicated on the rating plate of the motor.

2.7 Check fan operation for an hour.

Shut off the motor immediately if there is abnormal knocking or noise, excessive vibration, excessive motor heat, or other signs of abnormal operation. Restart is carried out only after the elimination of the observed problems with the permission of the manufacturer.

In the absence of defects, the fan is switched on to normal operation.

More detailed information about the rules of connection, operation and maintenance fans is indicated in the passport that comes with each device.