Free-Ball Float Trap 3N

Free-ball float trap

The drain valve is opened or closed by taking advantage of the change of liquid level of condensate water with the high-precision grinding stainless steel hollow float ball in the valve cavity. This steam trap has a simple structure, mainly consisting of float balls and automatic emptying devices. The sole action elements, namely, the stainless steel hollow float ball is manufactured by high-precision grinding process, and its entire sphere can serve as the sealing face and will not be worn intensively during the work, so it has a longer service life. In addition, there is no wearing part in the valve cavity, with a high reliability. The float ball can freely adjust the openness of the valve opening in response to the change of water level and discharge the condensate water continuously with a subcooled temperature of about 0℃ and higher efficiency.

The automatic emptying devices fall into two types : (within low pressure PN25) consisting of reservoir thermo-sensitive elements and (overheated steam system) consisting of bimetals.

Merits

1. The sole moving component is the high-precision grinding stainless float ball, which can resist erosion.

2. Its simple structure is convenient for maintenance.

3. To drain continuously with low noise, without being affected by the fluctuation of the pressure.

4. To be equipped with automatic emptying devices and it can eliminate air quickly and prevent air blocking and steam locking.

5. Small volume and large displacement.

6. To drain whenever there is water left over so as to quicken the startup speed of the system.

/The materials of primary accessories

Part and component name

Material

Valve body、valve cover

Cast iron、Cast steel、Stainless steel

Free float ball

304/316304/316 Stainless steel

Valve seat

High chrome stainless steel

Automatic air exhaust

Stainless steel、Thermo-sensitive element

Filtrating screen、Cover

Stainless steel

/Diameter of stainless bal

/Material

A,JH3N

B,JH5N

D,JH7N

E,JH9N

F,JH11N

G,JH13N

Cast iron

50

68

110

150

180

200

Cast steel

50

70

120

150

190

220

When the equipment is just started, the low-temperature condensate and air enter the valve cavity at the same time. At this time, open the automatic evacuation device to remove the air, so that the low-temperature condensate can enter the valve cavity smoothly. The liquid level of the condensate in the valve cavity will rise immediately, so that the floating ball will rise. Open the valve hole, so that the condensate can be discharged quickly. The steam in front of the equipment will enter the heating equipment quickly, so that the equipment can be heated quickly and heated up. When the steam or the temperature is lower than When the high temperature condensed water enters the valve chamber, the automatic emptying device starts to expand, the automatic air exhausting device is closed, and the drain valve starts to work normally. At this time, the floating ball in the valve chamber will rise and fall with the level of condensate, which can discharge condensate continuously. Because the valve seat hole of the free floating ball type drain valve is always below the condensate level, forming a water seal, the water vapor is naturally separated, and there is no steam leakage during operation. The minimum working pressure of the valve is 0.01Mpa, from 0.01Mpa to the maximum working pressure range, it is not affected by the fluctuation of temperature and working pressure, and can work continuously. Its minimum supercooling degree is about 0 ℃. Because the valve can automatically and continuously remove the condensate, there is no water accumulation in the heating equipment, which can make the heating equipment achieve the ideal heat exchange efficiency. It is one of the ideal drain valves for heating equipment of production process.

Description of work principle

FREE-BALL FLOAT TRAP

/Technique parameter

Shell

Pressure

 grade

Load

 Leakage

 rate

Used

 medium

Shell

material

Permitted

 backpressure

 rate

Maximum

operating

pressure differential

1.6、

2.5、

4.0、

6.4MPA

≈0%

Steam、

Condensate

water

/304/316

Carbon

 steel

≥80%

4.0MPA

Energy

 saving effect

Minimum

 subcooled temperature

Drainage method

Maximum

 allowable temperature

Air

exhaust

system

Pressure

change range

Excellence

0℃

Continue

 mode

420℃

Automatic

Adaption

/Prime out-form dimensions and weigh

Product

model

(DN)

Calibre

L

Flange

L/

Thread/

welding

H1

H2

W

Weight

(Mpa)

Pressure

change

range

(Mpa)

Nominal

 pressure

JH3N

15~20

25

-

195

215

55

90

95

3.61

0.1-2.5

2.5-4.0

JH3NF

15~20

25

195

215

-

55

90

95

5.5

0.1-2.5

2.5-4.0

/Capacity

Note

1. Please provide operating pressure and operating pressure difference, generating quantity of condensation water, operating temperature, connecting mode and standards in selecting product models.

2.The load of condensation water’s safety coefficient reaches 2 to 3 times in general.

3. Please make sure the drain valve is installed properly, maintained regularly, cleaned up and operates under the normal condition, so as to extend its service life.

4.The steam trap, if equipped with automatic exhaust valve, can have the quantity of condensate water increased by 300Kg/h.