Danfoss AVTB-RA Data sheet

Data sheet	AVTB-RA, Reverse Acting
	Thermostatic Water Valve

Applications:		AVTB-RA is a reverse acting thermostatic
		temperature controller used to regulate
		the water temperature where cooling is
		required. As the water temperature rises the
		thermostatic controller opens.
		Typical applications could involve:
			•	Injection molding machines
			•	Compressors
			•	Vacuum pumps
			•	Dry cleaning machines
		The thermostatic controller is a three part
		assembly consisting of the valve body, the
		thermostatic element and an adjustment
		assembly.
		Features:
		•	For water
		•	Self-acting
		• Opens on rising temperature
		• Can be fitted in the supply or return
		• Pressure range PN 16 (232 psi/16 bar)

Typical Application:

1.Oil Tank

2.Hydraulic machinery

3.Heat exchangers

4.Cooling water supply

5.Cooling water valve AVTB-RA

	Ordering			Connection	Capillary	Max. Sensor		Temperature
	Information:	Code No.	Model			Temperature	Cv	Range
				(FNPT)	Tube Length
						°F (°C)		°F (°C)
		003N6032RA				130 (55)		32-85	(0-30)
		003N6252RA	AVTB-RA 15	1/2"		190 (90)	2.2	77-150	(20-60)
		003N6272RA				255 (125)		125-190 (50-90)
		003N7032RA			6’ 6”	130 (55)		32-86	(0-30)
		003N7252RA	AVTB-RA 20	3/4"		190 (90)	4.0	70-150	(20-60)
					(2.0 m)
		003N7272RA				255 (125)		125-190 (50-90)
		003N8032RA				130 (55)		32-86	(0-30)
		003N8252RA	AVTB-RA 25	1"		190 (90)	6.4	70-150	(20-60)
		003N8272RA				255 (125)		125-190 (50-90)

VDBJD222 © Danfoss 12/12

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Data sheet	AVTB-RA, Reverse Acting
	Thermostatic Water Valve

Ordering

Accessories

Spare Parts

Information

Code No.

Components

Cap. tube

(Cont.):

Code No.

Components

length ft (m)

003N0075

Thermostatic element

003N0056

Capillary tube gland, 3/4” NPT

32-85°F (0-30°C)

003N0418

Gasket for capillary tube gland

003N0078

Thermostatic element

6’6

77-150°F (20-60°C)

(2)

AVTBWELL

Sensor pocket, 3/4” NPT, brass

Thermostatic element

003N0053

Sensor pocket, 3/4” NPT,

003N0062

125-190°F (50-90°C)

stainless steel

003N4006

For 1/2”

Repair set: Two diaphragms,

1. Include gasket for capillary tube gland

two O-rings, one rubber cone,

003N4007

For 3/4”

one tube of grease and eight

003N4008

For 1”

valve cover crews

003N6100

1/2”

Brass AVT body and

003N7100

3/4”

adjustment knob, less element

003N8100

1”

003N0520

AVT spare handle

Design:

Materials, parts in contact with water:

1.

Handle for temperature

2.

setting

Valve body:

Ms 58, hot-pressed

Spring housing

Other metal parts:

Ms 58

3.

Setting spring

Diaphragms:

EPDM rubber

4.

O-ring

(alt. NBR rubber

5.

Diaphragm

for mineral oils)

6.

Spindle

7.

Valve body

Capillary tube gland:

NBR rubber

8.

Valve cone

9.

Bellows

Valve cone:

NBR rubber

10. Bellows stop

Valve seat:

CR Ni steel

11.

Pressure stem

Sensor:

Cu

12. Temperature sensor

Sensor pocket:

Ms 63

13. Capillary tube gland

Specifications:	Supply temperature range:	-13°F to 266°F (-25°C to 130°C)
	Maximum working pressure:	232 psi (16 bar)
	Maximum differential pressure:	100 psi (7 bar)
	Maximum test pressure:	365 psi (25 bar)

Sizing: Example

Cooling water valve for temperature regulation of a vacuum pump. Regulation of the oil temperature is required. The sensor to be placed horizontally.

Given

•Necessary cooling effect at full load, 34,000 BTU/h

•Required oil temperature: 113°F (45°C)

• Cooling water pressure P1= 28.5 psi (2 bar)

AVTB-RA

•Outlet pressure P3= 0 psi (0 bar)

•Cooling water temperature T1= 77°F (25°C)

•Oulet temperature T2= 84°F (29°C), (ΔT= 7°F (4°C))

VDBJD222 © Danfoss 12/12

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