ZTV ZTR

ManualsBrandsSystemair ManualsAir Handling UnitsZTR 15-0,25 3-way valve - DN 15 Kvs 0,25

Revision 12 2015

— 1 —

ZTV/ZTR

Externally threaded 2- and 3-way zone

valves

Valves used for control of hot and cold water in

climate, heating and ventilation systems. They can

also control glycol-mixed water in for example liquid

connected recovery systems. Intended to be used

together with the RVAZ4 actuators.

9 Size DN15…DN25

9 Kvs value 0.25…7.0

9 Media temperature 1…110°C

9 Pressure rating PN16

9 Rangeability better than 50:1

9 No leakage

Function

2-way valve

The valve is open when the stem is in its lowest position

and closed when the stem is in its upmost position.

2-way valve

3-way valve

The 3-way valve is closed between port A and port AB

(the ports opposite to one another) when the stem is in

its highest position. In this position, the valve is also open

between the bottom port B and the common supply port

AB. When the stem is in its lowest position, the 3-way

valve is completely open between port A and port AB and

consequently closed between the bottom port B and the

common port AB.

3-way valve

No leakage in closed position

The valve has O-ring sealing between plug and seat, which

makes it completely tight in closed position. This makes

the valve very energy-efﬁcient.

ystemair Sverige AB

Industrivägen 3 · SE-739 30 Skinnskatteberg

+46 222 440 00 · mailbox@systemair.se

Summary of content (6 pages)

PAGE 1
Revision 12 2015 ZTV/ZTR Externally threaded 2- and 3-way zone valves Valves used for control of hot and cold water in climate, heating and ventilation systems. They can also control glycol-mixed water in for example liquid connected recovery systems. Intended to be used together with the RVAZ4 actuators. 99 99 99 99 99 99 Size DN15…DN25 Kvs value 0.25…7.
PAGE 2
Installation The 3-way valve is of a mixing type and must therefore be mounted in the mixing point. • Before installation of the control valve, ensure that the pipe is clean. Make sure that pipe scale, metal chips, welding slag and other foreign materials are removed. • For maximum efficiency and minimum wear, install the valve in a vertical position with the stem pointing upward. If the valve is mounted with the actuator on the side, more wear is caused to the valve packing box.
PAGE 3
Revision 12 2015 Technical data Application Heating systems, cooling systems, fan-coil units, ventilation systems Pressure rating PN16 Connection, actuator M30 x 1.5 Connection BSP externally threaded according to ISO 228/1 Flow characteristics Equal percentage Max. leakage 0 % of the kvs value Media Hot water, cold water, glycol-mixed water (max. 30 % glycol) Media temperature 1…110 °C (the valve has a max. temperature of 140°C, the RVAZ4 actuators have a max.
PAGE 4
Valve connections for copper tubing Article Description Connection Valve 1885136 Nut and olive 1/2”, K12 CTV10, ZTV15, ZTR15, VTTV15, VTTR15, VTTB 1886274 Nut and olive 3/4”, K15 CTV15, ZTV20 (kvs 2.0-2.5), ZTR (kvs 2.0-2.5), VTTV20 (kvs 2.5), VTTR20 (kvs 2.5), VTTB20 (kvs 2.5) 1884709 Nut and olive 3/4”, K18 CTV15, ZTV20, ZTR20, VTTV20, VTTR20, VTTB20 1886282 Nut and olive 1”, K22 CTV20, ZTV25, ZTR25 188 ...
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Revision 12 2015 Dimensions Measurements in mm unless otherwise specified.
PAGE 6
Pressure drop diagram Pressure drop 0,25 0,001 Flow 0,002 0,003 0,008 0,01 0,005 0,02 0,008 0,01 0,03 0,04 0,05 0,02 0,03 0,08 0,1 0,05 0,2 0,4 0,6 0,08 0,1 0,3 0,4 0,5 Example: calculation of kv value 0,3 0,4 0,5 0,2 0,8 1 2 6,0 7,0 0,8 1 3 2 4 5 3 8 10 5 8 10 20 30 40 50 Pressure drop mVp If the pressure drop is 11 kPa (A) and the flow is 0.8 m3/h (B), the kv value is 2.5 (C). See the markings in the picture to the right.