Danfoss USV-S Data sheet

Data sheet

Balancing valves USV-S

Application / Description

USV-S

USV-S valves are to be used in radiator heating systems to limit the flow in risers or horizontal loops.

USV-S valves are designed for manual hydronic balancing of heating and cooling systems.

USV-S (black knob) is used to limit the flow in heating or cooling installation or can work

separately as manual balancing valves for flow limitation.

USV-S is compact valves in which the operating elements and connections are placed within an arc of 90°, so that in spite of small valve

dimensions, access for installation and operation is optimal. Insulation caps for temperature up to 80 oC or 120 oC are available as accessory.

USV-S is supplied in a set-pack with internal thread.

USV-S in radiator application - vertical riser

USV-S in radiator application - horizontal loop

USV-S can also be used in floor heating systems. To limit the flow, every manifold with constant flow should be used together with USV-S valves.

USV-S in floor heating systems

DEN-SMT/SI

VD.C1.N1.02 © Danfoss 06/2015

1

Data sheet	Balancing valves USV-S

Application / Description The USV-S valves are to be used in systems with (continued) fan coils to limit the flow in order to provide

efficient heat distribution.

USV-S in cooling systems

Ordering	USV-S valve
	Type	DN	kVS	Int. thread	Code No.
			[m3/h]	ISO 7/1
		15	1,6	Rp ½	003Z2231
		20	2,5	Rp ¾	003Z2232
		25	4	Rp 1	003Z2233
		32	6,3	Rp 1¼	003Z2234
		40	10	Rp 1½	003Z2235
		50	16	Rp 2	003Z2236

Accessories and spare parts

Type		Comments/connection	Code No.
Insulation cap	up to 80 °C	DN 15	003L8165
		DN 20	003L8166
		DN 25	003L8167
		DN 32	003L8168
		DN 40	003L8169
		DN 50	003L8164
	up to 120 ° C	DN 15	003L8170
		DN 20	003L8171
		DN 25	003L8172
		DN 32	003L8173
		DN 40	003L8139
		DN 50	003L8138

2	VD.C1.N1.02 © Danfoss 06/2015

DEN-SMT/SI

Data sheet

Technical data

Design

1.Shut-off knob

2.Shut-off spindle

3.Setting spindle

4.Scale disc

5.O-rings

6.Valve cone

7.Valve body

Balancing valves USV-S

Max. working pressure	........................................16 bar	Material of parts in contact with water:
Test pressure............................................................	25 bar	Valve body, spindle, etc.........................................	Brass
Max. differential pressure across		Cone ....................................................................	DZR Brass
the valve (USV-S) ..............................	1,5 bar (150 kPa)	Diaphragm and O-rings......................................	EPDM
Flow temperature ......................	- 20 to 120 °C	Spring.........................................................	Stainless steel

DN
	DANFOSS
	SEBCP.ALLENKEY.001.01
15	2,5
20	3
25	4
32	5
40	5

Port A

Port B

Fig. 8 USV-S

USV-S incorporates a double cone (3.6) able to give maximum stroke limitation, thus achieving flow limitation. It also incorporates shut off function.

Use the following procedure to limit the flow:

•turn the valve knob fully counter clockwise to open the valve. The mark on the knob will now be opposite »0« on the scale .

•turn the valve knob clockwise to the required setting (e.g. for setting 2.2 the knob must be rotated two full turns and then forward to »2« on the scale.

•hold the knob to keep the setting (e.g. 2.2) and using a hexagon socket key turn the spindle fully counter clockwise (until a stop can be felt).

•turn the valve knob fully counter clockwise so that the mark on the knob is opposite »0« on the scale . The valve is now open as many turns from the closed position (2.2) as indicated by the convertion from required flow.

•to annul the setting, turn the hexagon socket key fully clockwise (until a stop can be felt).

Remember, at the same time the knob must be held on its »0« setting.

DEN-SMT/SI

VD.C1.N1.02 © Danfoss 06/2015

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