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Hydraulic Balancing Valve-SUS

Hydraulic Balancing Valve-SUS

Why use a balance valve(41-05)

Hydraulic balance is necessary to avoid the following problems :

  • Some rooms almost never achieve the desired room temperature or are not cooled sufficiently. This problem especially arises in case of influence of other heat sources.
  • After changing over from low temperature to heating operation, it takes time to heat the parts in the system.
  • Indoor temperature changes, especially in the case of small demand, there is a greater possibility of this situation.
  • Consume more energy

It is unusual if the above problem happens.

Why use a balance valve(41-05)

Hydraulic balance is necessary to avoid the following problems :

  • Some rooms almost never achieve the desired room temperature or are not cooled sufficiently. This problem especially arises in case of influence of other heat sources.
  • After changing over from low temperature to heating operation, it takes time to heat the parts in the system.
  • Indoor temperature changes, especially in the case of small demand, there is a greater possibility of this situation.
  • Consume more energy

It is unusual if the above problem happens.

Hydraulic Balancing Valve-SUS

41-05 Hydraulic Balancing Valve-SUS

 

Thread (2″ and below)

 

Flange (2.5″and above)

1

  Turning Wheel

2

  Turning Indicator

3

  Measuring Connector

Distribution of flow

 

If the drag in some parts of the piping is unbalanced, it will lead to unbalanced distribution of flow. The disposal to this problem is to install a Balance Valve in the piping and use a specific adjusted instrument to balance the drag in the system.

The illustration shows that the pump has to produce a differential pressure at least ΔPtotal to guarantee a sufficient supply to appliance 4. This will, however, inevitably result in an excessive differential pressure at the appliances 1 to 3. Such high a differential pressure will cause overheat or under heat and a waste of energy.

The principle of Balance Valve
 
The principle of balance is to adjust the gap between the core and the seat, for fluid flow through the valve, the gap changes the valve’s resistance, and the flow rate will be adjusted. The balance valve equals to a local part, which resistance can be adjusted. For fluid can not be compressed, there is the flow rate formula.
 

Q

：Flow rate of fluid through the balance valve（m3/h）

Kv

：The balance valve’s resistance modulus, which can be adjusted

ΔP

：Different pressure before and behind the balance valve（bar）


Kv is a modulus of a balance valve. It means, if the differential pressure before and behind a balance valve is 1 bar（1.02 kg/cm2）, the flow rate through the balance valve is Kv（m3/h）. And the valve’s Kv will no changes if the open rate of the valve’s core is not changed. That is, the opening rate of a balance valve determines the valve’s Kv.

The balance valve can be used in following conditions

 

  • The balance of boiler or ice water engine group

 

 

  • The balance of section’s cooling or heating system

 

 

  • The balance between ice water engine group and cooling tower

 

 

  • The balance of heating (or cooling) net in buildings

Dimension

Size

Material

 Connection

L(mm)

H(mm)

C(mm)

DN20

 Stainless Steel

 

 

 
 
 
 
 
 
 

3/4″ Thread

 84

130

70

DN25

 1″ Thread 96 130 70

DN32

1-1/4″ Thread

 110

145

70

DN40

 1-1/2″ Thread 120 150 70

DN50

2″ Thread

 150

160

70
DN65 2-1/2″ Flange 229 285 210

DN80

3″ Flange

 250

300

210

DN100

 4″ Flange 327 330 210

DN125

5″ Flange

 370

355

210

DN150

 6″ Flange 424 370 210

DN200

8″ Flange

 500

500

300

DN250

 10″ Flange 605 540 300

DN300

12″ Flange

 725

560

300

DN350

 14″ Flange 733 655 300

DN400

16″ Flange

 990

825

540

DN450

 18″ Flange 1000 845 540

DN500

20″ Flange

 1100

920

540

 

Note：

※King-Tech reserves the right to make any revisions on the valve model and size without prior notification.

※When making any design drawing, installation drawing or construction drawing, please do get our approved CAD with our signature, or we will not be responsible for any mistake.

Hydraulic Balancing Valve Adjustment

DN20~DN500, there are four types of wheels, similar in structure and function, and all have two scales.

0~10 graduated horizontal line: represents 1 turn.

0~9 tens of numbers: represents 0.1 turn.

Tolerance Chart

 

Specification

 

Class 10K/150LB/PN10 16K/PN16 PN25
Working Pressure

10 bar

16 bar

25 bar
Temperature

-10~100 ℃

-10~100 ℃

-10~100 ℃

※The SB balancing valves have memory part, and the turns of hand wheel can be easily turned back to originally position

Kv Curves

 

  • DN20-SUS

 

 

  • DN25-SUS

 

 

  • DN32-SUS

 

 

  • DN40-SUS

 

 

  • DN50-SUS

 

 

  • DN65-SUS

 

 

  • DN80-SUS

 

 

  • DN100-SUS

 

 

  • DN125-SUS

 

 

  • DN150-SUS

 

 

  • DN200-SUS

 

 

 

  • DN250-SUS

 

 

  • DN300-SUS

 

 

  • DN350-SUS

 

 

  • DN400-SUS

 

 

  • DN450-SUS

 

 

  • DN500-SUS

 

Installation Position

The Hydraulic Balancing valve should be possibly installed at the section of the straight pipe to stabilize the flow through the valve and to ensure the accurate measurement since the Valve has the function of measuring the rate of flow. Avoid installing the valve at the side of water supply, pump outlet and the position of turbulent flow.
 

Recommendation：

The distance between the curved pipe and the branch pipe is at least over 5D and 2D.

The distance between the pump outlet and the branch pipe is at least over 10D and 2D.

※D is the caliber of the Balancing Valve

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